The cross bridge cycle is a series of molecular events that occur after excitation of the sarcolemma. What is a cross bridge? Bridge View Available Hint(s)A. Calcium bound to troponinB. Amyosin head bound to actinC. ATP bound to a myosin headD. Troponin bound to tropomyosin
Answers
The cross-bridge cycle is a series of molecular events that occur after the excitation of the sarcolemma. A cross-bridge refers to B. Amyosin head bound to actin.
What is a cross-bridge?A cross-bridge is the term used to describe the attachment of the myosin head to the actin filament of a sarcomere. The "power stroke" or movement of the actin filament over the myosin filament is caused by this attachment. When the muscle contracts, these cross-bridges are created in the myosin filaments and actin filaments of the sarcomere, which pulls the filaments closer together.
However, Calcium bound to troponin and Troponin bound to tropomyosin are components of the mechanism that allow actin and myosin to interact in a controlled manner through the regulation of calcium ions, which enables muscle contraction to occur.
ATP is the energy currency of the body and, during the cross-bridge cycle, it is hydrolyzed by the myosin head in order to generate the energy needed to drive movement. The Sarcolemma is the cell membrane of striated muscle fibres, which encloses the fibre's cytoplasm or sarcoplasmic reticulum.
Hence, the correct option is B. Amyosin head bound to actin.
To know more about Sarcolemma:
https://brainly.com/question/13941696
#SPJ11
Related Questions
the cis to trans conversion of retinal when photopigments respond to light is called:
Answers
The cis to trans conversion of retinal when photopigments respond to light is called isomerization.
What is isomerization?Isomerization is a chemical process that converts one isomer into another without altering the overall atomic composition. Isomerization may be a physical process such as changing the position of a molecule within a crystal lattice or a chemical process in which the chemical structure of a molecule is rearranged. It is generally referred to as a chemical reaction involving a structural modification that occurs spontaneously or catalytically.
Isomerization is a natural process that occurs in a variety of biological systems, including retinal when photopigments react to light. When retinal absorbs light, the retinal molecule undergoes a cis-to-trans isomerization. The conformation of the molecule alters from a bent, unstable conformation to a straight, more rigid one, resulting in the activation of an ion channel in the cell membrane. This, in turn, results in the generation of a visual signal that is sent to the brain, and the sensation of light is perceived.
To know more about photopigments visit:-
https://brainly.com/question/33441269
#SPJ11
A scientist is conducting research about all the plants and wildlife in the Mojave Desert as well as the desert’s resources, such as water and soil. The scientist is studying
Answers
Answer:
An ecosystem
Explanation:
Answer:
D. an ecosystem
Explanation:
Just took the test and got a 100% on edge2020 :)))
Which of the following is NOT true regarding the G-protein coupled receptor family?
A. Since they lack intrinsic enzymatic activity, they must couple with other transmembrane
receptors in order to function
B. Although the amino acid sequences can be quite different, they have a roughly similar
arrangement of transmembrane domains
C. They interact with heterotrimeric, GTP-binding proteins which couple the receptor to
different target enzymes
D. Receptors can be grouped into families using either functional or structural similarities.
Answers
Option A is NOT true regarding the G-protein coupled receptor family.
What are G-protein coupled receptors?
G-protein coupled receptors (GPCRs) are a diverse family of transmembrane receptors that respond to a wide range of external stimuli by activating intracellular signaling pathways.
A G protein-coupled receptor is a transmembrane protein with seven transmembrane domains that extend through the lipid bilayer of the cell membrane (7TM).
These are common cell membrane receptors that interact with G proteins, making up the G-protein coupled receptor family.
As a result, it activates an intracellular signal transduction pathway that eventually leads to a cellular response.
The correct option that is not true is Option A.
Since GPCRs have intrinsic enzymatic activity, they can function independently of other transmembrane receptors.
#SPJ11
Learn more about G-protein:
https://brainly.com/question/10058019
What are the 3 questions that MUST be asked when deciding what kingdom an organism falls into?
Answers
bro u dont need to ask questions, its so simple.
Here are the classifications:
Kingdom Animalia- Animals
Kingdom Fungi- Mushrooms
Kingdom Plantae- plants
Kingdom Monera- prokaryotes (Archaebacteria)
Kingdom Protista- eukaryotes (Eubacteria)
periodic pulsatile secretion of gnrh appears to be important in
Answers
Periodic pulsatile secretion of gonadotropin-releasing hormone (GnRH) appears to be important in regulating the reproductive system and the secretion of reproductive hormones.
GnRH is a hormone produced in the hypothalamus of the brain.
It plays a crucial role in the regulation of the reproductive system by controlling the release of other hormones involved in reproduction, such as luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from the pituitary gland.
The pulsatile secretion of GnRH is necessary for proper functioning of the reproductive system.
The pulsatile pattern refers to the intermittent release of GnRH in a rhythmic manner, with episodes of high concentration followed by periods of low concentration.
This pulsatile secretion of GnRH is essential for the regulation of the menstrual cycle in females and the production of sperm and testosterone in males.
It stimulates the pituitary gland to release LH and FSH in a pulsatile manner, which in turn stimulates the ovaries in females or the testes in males to produce sex hormones and regulate the development and maturation of eggs, sperm, and reproductive tissues.
The pulsatile secretion of GnRH is tightly controlled by feedback mechanisms, including the levels of sex hormones (such as estrogen and testosterone) in the bloodstream.
These feedback mechanisms help maintain a delicate balance and fine-tune the reproductive processes in response to various internal and external factors.
In summary, the periodic pulsatile secretion of GnRH is crucial for the regulation of the reproductive system, including the release of reproductive hormones and the coordination of reproductive processes in both males and females.
To know more about gonadotropin-releasing hormone refer here:
https://brainly.com/question/29297221#
#SPJ11
Why are changes in nucleosome spacing important in changing gene expression?Select the two correct answers.When DNA is unmethylated and histones are acetylated, nucleosomes are spaced in the open configuration and transcription can occur.When DNA is methylated and histones are deacetylated, nucleosomes are relatively close together and transcription is suppressed.Nucleosome spacing depends on maternal and paternal imprinting and influences organismal adaptability to environmental stress.When DNA is phosphorylated or methylated and histones are acetylated, transcriptional activity is stimulated at specific DNA regions.
Answers
When DNA is unmethylated and histones are acetylated, nucleosomes are spaced in the open configuration and transcription can occur. When DNA is methylated and histones are deacetylated, nucleosomes are relatively close together and transcription is suppressed. Therefore, changes in nucleosome spacing can directly affect the accessibility of DNA to transcription factors and other regulatory proteins, ultimately impacting gene expression.
Gene expression is the process through which a gene's information is used to create a functioning gene product, allowing it to produce end products like proteins or non-coding RNA and ultimately have an impact on phenotypes. However, in non-protein-coding genes like transfer RNA (tRNA) and small nuclear RNA (snRNA), the end result is a functional non-coding RNA instead of a protein. The core tenet of molecular biology, which Francis Crick first proposed in 1958 developed in his 1970 article and was later enlarged by the findings of reverse transcription and RNA replication, summarises gene expression.
To know more Gene expression
https://brainly.com/question/15159232
#SPJ11
What do viruses need to reproduce? (Or can they reproduce all by themselves)?
Answers
Answer:
virus can direct the cell machinery to produce more viruses.
Explanation:
They cant asecualy reproduce
Which chromosomal change is represented?
deletion
translocation
inversion
insertion
Answers
The type of chromosomal change which is represented in the diagram given is deletion. The correct option is A.
What is deletion?In genomics, a deletion is a type of mutation that involves the removal of one or more nucleotides from a segment of DNA.
A deletion can result in the loss of any number of nucleotides, ranging from a single nucleotide to an entire chromosome.
Because an insertion or deletion causes a frame-shift that alters the reading of subsequent codons.
This alters the entire amino acid sequence that follows the mutation, insertions and deletions are usually more harmful than a substitution that only changes one amino acid.
Thus, the correct option is A.
For more details regarding mutation, visit:
https://brainly.com/question/13923224
#SPJ1
Your question seems incomplete, the missing image is attached below:
What Diseases are caused by DNA mutations? What is the depth of that Disease? Where was this information from/Source? Thank you!
Answers
Answer: But the mutations we hear about most often are the ones that cause disease. Some well-known inherited genetic disorders include cystic fibrosis, sickle cell anemia, Tay-Sachs disease, phenylketonuria and color-blindness, among many others. All of these disorders are caused by the mutation of a single gene.
online
Explanation:
BRAINLESS
Which of the following is NOT an example of a vascular plant?
O Redwood Trees
O Gerber Daisy
O Aloe Plant
O Mountain Moss
Answers
b) The correlation coefficient for all of the data (r) was calculated as 0.85. What type
of correlation does this show? Explain. (2 points)
DELL
Answers
A strong correlation between independent and dependent variables is indicated by a coefficient of correlation of 0.85.
What type of correlation is this?Correlation coefficients serve as measures of how strongly two variables are related linearly. Positive relationships are shown by correlation coefficients greater than zero. A value less than zero denotes an negative association. Lastly, a value of 0 denotes that there is no correlation between the two variables, x and y.
On dividing the covariance by the sum of the standard deviations of the two variables, one may calculate the correlation coefficient. Here, the given correlation value of the data is 0.85. So, the more severe (closer to -1 or 1) the correlation coefficient, the stronger the association. This also signifies that a correlation that is close to zero denotes the independence of the two variables, i.e., that neither variable tends to drop nor rise as the other does.
To know more about correlation coefficient, visit:
https://brainly.com/question/12400903
#SPJ1
The roof of an eco-house is covered with soil. Covering the roof with soil decreases the thermal conductivity of the roof. What are the two of the choices listed below are advantages of having a roof with a lower thermal conductivity?
1) Less energy is needed to heat the house.
2) The rate of energy transfer by conduction is greater.
3) The roof is a better insulator.
4) The roof is less likely to leak.
5) Weather will have a greater effect on the temperature of the house.
Answers
Answer:
To understand how insulation works it helps to understand heat flow, which involves three basic mechanisms -- conduction, convection, and radiation. Conduction is the way heat moves through materials, such as when a spoon placed in a hot cup of coffee conducts heat through its handle to your hand. Convection is the way heat circulates through liquids and gases, and is why lighter, warmer air rises, and cooler, denser air sinks in your home. Radiant heat travels in a straight line and heats anything solid in its path that absorbs its energy.
Most common insulation materials work by slowing conductive heat flow and convective heat flow. Radiant barriers and reflective insulation systems work by reducing radiant heat gain. To be effective, the reflective surface must be in contact with an air space.
Answer:
Explanation:
A thick layer of material with a low thermal conductivity reduces the rate of heat transfer from the ceiling into the roof space.
A. What are conidiospores (conidia) and sporangiospores (sporangia)? B. How can you differentiate visually between conidia and sporangia?
Answers
A. Conidiospores (conidia) and sporangiospores (sporangia) are types of asexual spores produced by fungi for reproduction. Conidiospores are unicellular or multicellular spores produced by conidiogenous cells on the hyphae, while sporangiospores are produced within a sac-like structure called sporangium.
Conidiospores (conidia) are spores formed externally on the hyphae without any protective covering. They are produced by a process called conidiogenesis, in which conidiogenous cells give rise to the conidiospores. They can vary in shape, size, and color.
Sporangiospores (sporangia), on the other hand, are formed within a sporangium. The sporangium is a sac-like structure that contains and protects the spores. Once the sporangium ruptures, the sporangiospores are released into the environment to germinate.
To differentiate visually between conidia and sporangia, you can look for the presence of a protective structure. Conidia are formed externally on the hyphae without any covering, while sporangiospores are enclosed within a sporangium. Additionally, you can observe differences in their shapes, sizes, and colors.
To know more about spores, visit;
https://brainly.com/question/1022692
#SPJ11
Give an example of physical weathering.
Answers
Answer:
Ice wedging.
Explanation:
Ice wedging causes many rocks to break.
which feature of the genetic code ensures that translation of a single mrna sequence will always result in the same amino acid sequence?
Answers
The feature of the genetic code that ensures that the translation of a single mRNA sequence will always result in the same amino acid sequence is the codon-anticodon pairing.
Codons and anticodons match up during protein synthesis to create the polypeptide chain. There are 20 amino acids in proteins, and 64 different codons exist in the genetic code. The genetic code is read in a 5′ to 3′ direction. The first nucleotide in the codon is located on the 5′ end of the mRNA, whereas the last nucleotide is located on the 3′ end of the mRNA.
The genetic code is degenerate, which means that more than one codon corresponds to the same amino acid. The only exceptions are methionine and tryptophan, which have just one codon that codes for them. As a result, the codon-anticodon pairing guarantees that a single mRNA sequence will always result in the same amino acid sequence.
To know more about translation:
https://brainly.com/question/29712965
#SPJ11
Which of the following is NOT a characteristic of bipedalism? More anterior foramen magnum All of these are characteristics of bipedalism Short, wide pelvis Angled femur C-shaped vertebral column
Answers
The option "C-shaped vertebral column" is NOT a characteristic of bipedalism.
Bipedalism refers to the ability of an organism to walk or move on two hind limbs. It is a characteristic feature of humans and certain other primates. Bipedal locomotion is achieved by balancing the body weight over the feet while alternating leg movements.
Here are some key points about bipedalism:
Evolutionary Advantage: Bipedalism is considered a significant evolutionary adaptation. It frees the hands for other activities, such as tool use, carrying objects, and manipulating the environment. It also provides an elevated viewpoint, allowing for better observation and communication.Skeletal Adaptations: Bipedal locomotion involves specific adaptations in the skeleton. Humans have a distinctive S-shaped spine that helps maintain balance, an elongated and centrally positioned pelvis for stability, and an arched foot with a spring-like structure for shock absorption.Energy Efficiency: Bipedal walking is generally more energy-efficient compared to quadrupedal (four-legged) locomotion. It allows for efficient long-distance travel and endurance, enabling humans to cover large distances and engage in activities like hunting and foraging.Human Bipedalism: Humans exhibit habitual bipedalism, meaning they primarily rely on walking on two legs as their primary mode of locomotion. Other primates, such as chimpanzees and gorillas, can walk upright for short distances but primarily use quadrupedal locomotion.Variations in Bipedalism: Bipedalism can vary among individuals and populations. Factors such as leg length, body proportions, muscle strength, and cultural practices can influence variations in walking style and efficiency.Fossil Evidence: Fossil evidence suggests that bipedalism originated in early hominins, our ancestors, around 4-6 million years ago. The development of bipedalism is thought to have been influenced by factors like changing environments, habitat transitions, and the need to free the hands for tool use.To know more about Bipedal locomotion, visit
https://brainly.com/question/28286095
#SPJ11
Environmental factors can influence natural selection because they can increase or decrease and what can they increase or decrease in
Answers
Environmental factors can influence natural selection because they can increase or decrease and what can they increase or decrease in the amount of genetic variation in a population.
What is natural selection?Populations of living things adapt and change through a process called natural selection. A population's members are naturally varied, which means that they are all distinctive in some ways. Because of this variety, some people have characteristics that suit their surroundings more than others.
Four requirements must be met for natural selection to take place: reproduction, inheritance, variety in physical traits, and variation in the number of children produced by each person.
Reproduction:
A population must procreate to produce a new generation in order for natural selection to affect it. Over many generations, people who have the characteristics that are most compatible with their environment tend to breed more than people who don't.
Heredity:
Since the genes of the parents combine to form the DNA of their offspring, heredity and reproduction go hand in hand. Natural selection must operate if parents with favourable qualities pass those traits on to their kids.
Variation in Characteristics:
Only when individuals within a community differ in their personal features can natural selection take place. For instance, different people must have varied colors in order to research natural selection on color within a population. There wouldn't be any traits for nature to "select" over others in the absence of variety in traits.
Fitness Variation:
Compared to its popular notion, fitness has a more technical meaning. Fitness in the context of evolution refers to an organism's capacity for maximum survival and reproduction. Natural selection cannot take place in a population unless its individuals have varying levels of fitness. Some people must have characteristics that make it easier for them to survive and procreate more frequently than others. Otherwise, natural selection cannot act to increase the number of people with advantageous features and decrease the number of people with undesirable qualities.
For more information regarding natural selection, visit:
https://brainly.com/question/23929271
#SPJ1
Organisms resemble their most recent ancestors more closely than distant ancestors.
*
1 point
True
False
Answers
Answer:
True
Explanation:
Question #8 Fill in the Blank Complete the following sentence. If a grower's greenhouse has been successful in the management of challenging species that often defeat professional growers, this can lead to specialization in producing for other growers.
Answers
The successful management of challenging species that often defeat professional growers can lead to specialization in producing those crops for other growers.
This specialization can occur because the grower's experience and expertise in effectively managing the challenging growers valuable knowledge and techniques that can be shared with other growers. As a result, these growers can also benefit from the successful management strategies and improve their own crop production.The following sentence can be completed as: If a grower's greenhouse has been successful in the management of challenging species that often defeat professional growers, this can lead to specialization in producing those crops for other growers. The successful management of challenging species that often defeat professional growers can lead to specialization in producing those crops for other growers. Successful management means that the grower was able to develop the right conditions and implement the appropriate measures to prevent the plant's growth issues, whether related to pests, diseases, or environmental factors that might affect it.
learn more about growers here:
brainly.com/question/32274037
#SPJ11
What would happen if the water table rose above the ground surface?
Answers
Cells from different parts of an organism have varying
and
Answers
The study of the cell is called cell biology. There are two types of cells on the basis of the number and these are unicellular and multicellular.
The question is incomplete. kindly provide the full question so that we can able to assist you.
What is cell division?The formation of new cells from the preexisting cell is called cell divisionThe number of the chromosome may or may not be the same as compared to the parent cellHence, kindly provide the proper information.
Hence, for information, refer to the link:-
https://brainly.com/question/787658
HELP ASAP!!
Which option describes the particles of water as the liquid water actively boils?
A:The particles will have the same average kinetic energy and a decrease in temperature during boiling
B: The particles will lose kinetic energy and increase temperature during boiling.
The particles will lose kinetic energy and increase temperature during boiling.
C: The particles will have the same average kinetic energy and the same temperature during boiling.
The particles will have the same average kinetic energy and the same temperature during boiling.
D: The particles will lose kinetic energy and decrease temperature during boiling
Answers
Option C: The particles will have the same average kinetic energy and the same temperature during boiling.
What is the boiling point?
The boiling point of a substance is the temperature at which this substance can break into the boil.
When talking about water, its boiling point is always 100ºC to atmospheric normal pressure.
So, when water reaches 100ºC it starts boiling as we can see in the graph, where the curve reaches stability -the plateau-.
What is the evaporation point?The evaporation point is the moment at which articles can change from liquid to gas state after acquiring enough kinetic energy to escape from water surface.
The change of state can occur
on liquid water surface ⇒ evaporation on liquid water body ⇒ boiling
Evaporation is a superficial change. Water does not need to be at its boiling point for molecules to evaporate. Superficial molecules just need to gain enough kinetic energy to do it.
Evaporation velocity depends on temperature. More temperature, more velocity.
According to this information, the correct option should be option C: The particles will have the same average kinetic energy and the same temperature during boiling.
A: The particles will have the same average kinetic energy and a decrease in temperature during boiling ⇒ No, there is no decrease in temperature
B: The particles will lose kinetic energy and increase temperature during boiling ⇒ No, there is no decrease in kinetic energy
D: The particles will lose kinetic energy and decrease temperature during boiling ⇒ No, there is no decrease in kinetic energy or temperature
You will learn more about boiling point and evaporation at
https://brainly.com/question/17610340
https://brainly.com/question/15164572
#SPJ1
Charles Darwin outlined the theory of evolution in
his 1859 book on the Origin of Species.
Which statement best explains how the theory has
changed since 1859?
A. )The theory of evolution has been merged with
Aristotle's theory that organisms are created in a
permanent form.
B. )The theory of evolution has been amended by
Wallace's theory that genetic traits are changed
through use and disuse.
C. )The theory of evolution has been abandoned as
new evidence from Lamarck has proved that the
main concept of the theory is incorrect.
D. )The theory of evolution has been revised as
some of Darwin's predictions are proved correct
by new biological and genetic discoveries.
Answers
Answer:
D.) The theory of evolution has been revised as some of Darwin's predictions are proved correct by new biological and genetic discoveries.
Explanation:
took test
The statement that explained the theory has changed is option d. new biological and genetic discoveries.
Theory of evolution?It should be produced by natural selection should be first formulated in the book of Charles Darwin in the year 1859. In this, it shows how the organism should evolve over the generations via the inheritance of physical or behavioral traits.
So based on this, the evolution theory should be revised since the predictions are somewhat true via new biological and genetic discoveries.
Learn more about evolution here; https://brainly.com/question/4346822
In which ways might ocean currents be like streams and rivers on land
Answers
Answer:
Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface.
Ocean currents in different ways might be like streams and rivers on land they sweep along the predictable paths. Ocean currents flow at the surface, and flow deep within the waterbodies.
What are Ocean currents?Ocean currents act much like similar to a conveyer belt. Ocean currents transport warm water and precipitation of water from the equator towards the poles and cold water from the poles back to the tropics of the globe. Thus, the currents which regulate global climate, helping to counteract the uneven distribution of solar radiations reaching to the Earth's surface.
Ocean currents flow like that of vast rivers, sweeping along with the predictable paths. Some of the ocean currents flow at the surface and others flow deep within the water. Some ocean currents flow for very short distances, however others cross entire ocean basins and even circle the globe.
Learn more about Ocean currents here:
https://brainly.com/question/21654036
#SPJ2
What is herd immunity, and why are vaccines important for achieving herd immunity?
Answers
Answer:
Herd immunity is a form of indirect protection from infectious disease that can occur with some diseases when a sufficient percentage of a population has become immune to an infection, whether through vaccination or previous infections, thereby reducing the likelihood of infection for individuals who lack immunity.
Explanation:
Vaccines create immunity without causing illness or resulting complications. Herd immunity makes it possible to protect the population from a disease, including those who can't be vaccinated, such as newborns or those who have compromised immune systems.
Which one is not matter?
(a) Electricity
(b) Paper
(c) Water
Answers
Answer:
A) electricity
Explanation:
Matter is something that occupies space and has mass
A cell with two pairs of each set of chromosomes is called a diploid cell. These cells are typically found throughout the body tissues and are called [ germ / somatic ] cells.
Answers
Answer:
somatic
Explanation:
What is an Example of Structural Adaptation for Reproduction with Plants?
Flexible Stems
Spines Development
Deep Root Systems
Ballistic Seed-Dispersal
Answers
Answer:
An example of structural adaptation for reproduction with plants is c. Deep root systems.
Deep root systems are a structural adaptation that allows plants to access water and nutrients from deeper layers of soil, increasing their chances of survival in dry or nutrient-poor environments. These deep roots also allow the plant to establish itself firmly in the soil, increasing its chances of reproducing successfully.
Option a. Flexible stems, b. Spines development and d. Ballistic seed-dispersal are not structural adaptations related to reproduction, but other strategies that plants use to survive in different environments. Flexible stems allow plants to bend and sway in the wind without breaking, spines development protect plants from herbivores and Ballistic seed-dispersal is a way for plants to scatter their seeds away from the parent plant.
give me brainiest
An element has an atomic number of 51 and 71 neutrons. Give the name of the
element, the number of protons, the number of electrons and the mass number
Answers
Answer:
The element is Antimony
Explanation:
Number of Protons - 51
Number of Electrons - 51
Mass number - 121.76 u
The chrysanthemums shown in the photo produce their
blooms in the fall.
Which term best describes this kind of plant?
A. Nonflowering plant
B. Day-neutral plant
C. Long-day plant
D. Short-day plant
Answers
Answer:
Solution A. The phrase that best describes this kind of plant is non-flowering plants.
without flowers plants.
Mosses, liverworts, hornworts, lycophytes, and ferns are among the non-flowering plants that reproduce through spores. Conifers and gymnosperms are non-flowering plants that still set seed.
There are no grains, fruits, or flowers on non-flowering plants. Typically, spores are used to create them. They contain cryptogams and gymnosperms. However, a group of plants known as gymnosperms do produce seeds.
According to the options, the distinction between flowering and non-flowering plants is that the former "produce cones, while the latter do not. " ".
This is demonstrated by the fact that flowering plants produce seeds from their flowers, whereas non-flowering plants only produce cones.
Another difference between the two is that flowering plants use pollination while non-flowering plants use dispersal.
Option A) "Nonflowering plants" is the phrase that best describes this kind of plant. ".