list three differences between gram positive and gram negative bacteria besides the color difference when they are stained.
Answers
Gram-positive cells retain the purple stain after the gramme staining technique. Gram-negative cells do not retain the purple stain after the gramme staining technique.
What distinguishes bacterial stains that are Gram positive from those that are Gram negative?While Gram negative bacteria have an outer lipid membrane and a thin peptidoglycan layer, Gram positive bacteria have a thick peptidoglycan layer.
What distinguishes the cell walls of Gram positive and Gram negative organisms?Thick layers of peptidoglycan make up the cell wall of gram-positive bacteria. In contrast, gram-negative bacteria have a cell wall made of very thin peptidoglycan layers. A gram-positive cell retains the purple stain after the gramme staining process.
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Related Questions
Aluminum is in group 3 and period 3 on the periodic table. Fluorine is in group 7 and period 2 on the periodic table. What is the correct formula for a compound of aluminum and fluorine?
Al3F
AlF3
AlF2
Al2F
Answers
The correct formula for a compound of aluminum and fluorine in the periodic table is AlF3. Option 2 is the answer.
What is the periodic table?The modern periodic table consists of 118 elements, organized into rows (called periods) and columns (called groups) based on their electron configurations and chemical properties. The elements are arranged such that elements with similar properties are located in the same column, while elements in the same row have the same number of electron shells.
Aluminum has three valence electrons and can lose them to form a 3+ cation, while fluorine has seven valence electrons and can gain one electron to form a 1- anion.
In order to form a neutral compound, three fluoride ions (F-) are needed to balance the charge of one aluminum ion (Al3+). Therefore, the correct formula is AlF3.
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Evaporation of sweat cools the skin because A. Liquids reduce the average kinetic energy of a surface by slowing down molecular movement. B. Liquid water is always at a lower temperature than solid substances under the same conditions. C. The molecules with the highest energy of evaporate first, lowering the temperature of the sample. D. The movement of the molecules during evaporation lowers the skin’s temperature.
Answers
The answer is option C.
Translation is the process of:
a. mRNA being decoded into proteins
b. DNA being copied into mRNA
c. DNA being duplicated
d. mRNA is being copied into DNA
Answers
Answer:
A
Explanation:
Because Translation refers to the process of creating proteins from an mRNA template.
what would be the affect on pcr reaction, if primers are not added in the reaction?
Answers
Answer:
In absence of the primer the reaction lacks a primer template junction, and thus a free 3′-hydroxyl group will cause the reaction to fail.
Explanation:
In the PCR reactions primers are used to bind to ssDNA template hybridize itself and define the segment or part of the sample that will be amplified. This hybridize template makes the primer template junction.
If primers not added this junction would not be created then the enzyme DNA polymerase cannot make new DNA due to there is no free 3′-hydroxyl group which is essential to bind with the first deoxynucleotide.
Thus, In absence of the primer the reaction lacks a primer template junction, and thus a free 3′-hydroxyl group will cause the reaction to fail.
Type the correct answer In each box.
Use numerals Instead of words.
A force of 25 newtons moves a box a distance of 4 meters In 5 seconds. 5
The work done on the box Is
Nm, and the power S
Nm/S.
Reset
Next
Answers
Refer to the answer below for the question:
Force = 25 N
Distance = 4 m
Time = 5 s
WorkThe formula for work done is,
Work (W) = F x s
where,
F = force applied
s = displacement of the object
Therefore, the work done by the box will be,
Work = 25 N x 4m = 100 Nm
PowerThe formula for power is,
Power = W / Δt
where,
W = work done
Δt = time taken to do the work
Therefore, the resultant power required to move the box will be,
Power = 100 Nm / 5 s = 20 Nm/s.
Hence the answers are, work = 100 Nm and power = 20 Nm/s.
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3. How many strands of DNA make up the DNA molecule?
1
2
3
4
Answers
Short Answer: 2
How are extrusive rocks formed?
Magma gets trapped inside Earth and cools to rock.
Volcanoes apply force to solid rocks and eject them.
Magma gets forced to Earth’s surface and cools to rock.
Volcanoes trap lava inside Earth, where it cools to rock.
Answers
Extrusive rocks formed when Magma gets forced to Earth’s surface and cools to rock.
What is Extrusive rocks?Extrusive rocks are volcanic rocks that are formed from molten magma that has cooled and solidified on the Earth's surface. Examples of extrusive rocks include basalt, andesite, rhyolite, and obsidian. These rocks are formed when magma is forced to the surface by gas pressure or by an explosive eruption. Extrusive rocks have a fine-grained texture as a result of their rapid cooling process, as opposed to intrusive rocks which cool slowly over a long period of time and have a coarse-grained texture.
Therefore, Extrusive rocks formed when Magma gets forced to Earth’s surface and cools to rock.
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Answer: C
Explanation:
to study the details of protein molecules on the surface of a cell a biologist wouldmost likely use a
Answers
Scanning electron microscope (SEM) can be used to study the details of protein molecules present on the surface of a cell. These give a three-dimensional structure of the molecules. Thus, the correct option is A.
What is Scanning Electron Microscope (SEM)?Scanning electron microscope (SEM) is a type of electron microscope, designed to directly study the surfaces of solid objects, that utilizes a beam of focused electrons of relatively low energy is scanned in a regular manner over the specimen to be observed.
Scanning electron microscopes use an electron beam to study samples with a resolution. The electrons are emitted from a filament and collect into a beam in the electron source. The beam is focused on the sample by a set of lenses in the column.
Therefore, the correct option is A.
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Your question is incomplete, most probably the complete question will be:
To study the details of protein molecules on the surface of a cell a biologist would most likely use a:
a. scanning electron microscope
b. transmission electron microscope
c. compound light microscope
d. dissecting microscope
An air temperature of -18C is equal to
Answers
Answer:
-0.4 F
255.15K
Explanation:
In addition to loss of muscle mass, which is a symptom of inadequate calorie intake?
Answers
In addition to loss of muscle mass, inadequate calorie intake can lead to loss of bone density and an increased risk of fatigue, illness, injuries and poor recovery.
Why is it important to consume adequate calories?When your consumption of calories is not adequate, your body will not get all the necessary nutrients.It slows down the metabolism so as to conserve energyCalorie restriction can lead to reduce in leptin, a hormone that regulates appetite.Lower levels of leptin can lead to increase in hunger thus a person overeats. This results in increase in body weight.Low-calorie dieting increases stress and results in the release of the stress hormone (cortisol). Due to response to stress, the body conserves energy and the metabolism slows to combat the risk of starvation. Therefore, it is important to consume appropriate amount of calories and nutrients.Learn more about calorie intake here:
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What is a segment of DNA that codes for a specific trait
Answers
Answer:
Gene.
Explanation:
A gene is a segment of a DNA molecule that codes for a particular protein and determines the traits of the individual.
Which statement BEST explains the role of DNA in the growth and specialization of an organisms?
Question 2 options:
A.DNA stores genetic information
B.DNA directly controls your body.
C.DNA controls which proteins are produced in each cell for different functions.
D.DNA creates all the same proteins in each cell of the organism's body.
Answers
C.DNA controls which proteins are produced in each cell for different functions.
different genes can be activated or inactivated that's why even though the cells that line your stomach contain the gene for ACTH synthesis they don't synthesize it
At the end of this process in this cell, each DNA strand is...
Completely built new with a different code
Is one half the original DNA and one half new DNA with the same code as the original strand preserved
Is one half the original DNA and one half new DNA with a different code
Answers
Answer:
Is one half the original DNA and one half new DNA with the same code as the original strand preserved
Explanation:
I am assuming the process is DNA replication.
The process of DNA replication:
step 1- the DNA double helix unwinds using an enzyme called dna helicase. Proteins hold the strands apart from each other forming a Y shape called the replication fork.
step 2- At the replication fork, enzymes called DNA polymerase move along each of the DNA strands adding complementary bases to the nitrogen bases using base pairing rules.
step 3- DNA polymerases add nucleotides to a growing double helix until all the DNA is copied
result- 2 new DNA molecules, each made of one original strand and one copied strand
In both prokaryotes and eukaryotes, DNA replication happens
Group of answer choices
only to telomeres.
around the histones.
in the nucleus.
before cell division.
Answers
DNA replication happens before cell division in both prokaryotes and eukaryotes.
DNA replication represents a key step in the cycle of every cell, irrespective of whether they are prokaryotes or eukaryotes. The process happens during the interphase of the cell cycle - the S phase to be specific.
After DNA replication, cells generally proceed to the G2 phase where protein is synthesized before entering the mitotic phase of the cell cycle where division takes place.
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In both prokaryotes and eukaryotes, DNA replication happens before cell division.
When does the cell divideIn both prokaryotes and eukaryotes, DNA replication occurs before cell division. DNA replication is the process by which a cell duplicates its DNA, creating an identical copy of the genetic material. It is a crucial step in the cell cycle to ensure that each daughter cell receives a complete set of genetic information.
In prokaryotes, which are organisms without a nucleus, DNA replication occurs in the cytoplasm. The circular DNA molecule present in prokaryotes, called the bacterial chromosome, is replicated before the cell divides through a process called binary fission.
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What is the significance of Pasteur's experiment to test the germ hypothesis?
a) it proved that heat can sterilize a broth
b) it demonstrated that cells can arise spontaneously
c) it demonstrated that some cells are germs
d) it demonstrated that cells can arise only from other cells
Answers
The significance of Pasteur's experiment was that it demonstrated that cells can arise only from other cells, thus disproving the theory of spontaneous generation. This was a key piece of evidence in support of the germ hypothesis, as it showed that certain cells (i.e. germs) were responsible for causing diseases rather than them arising spontaneously.
Additionally, the experiment also proved that heat can sterilize a broth, which is a critical technique in modern microbiology for preventing contamination and ensuring sterile conditions.
The significance of Pasteur's experiment to test the germ hypothesis is that it demonstrated that cells can arise only from other cells (option d). This experiment disproved the concept of spontaneous generation and supported the idea that microorganisms come from existing microorganisms, which is a crucial foundation in understanding germ theory and sterilization techniques.
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How do basaltic rocks differ from granitic rocks?
Basaltic rocks are more dense and cool more quickly than granitic rocks.
Basaltic rocks are less dense and cool more quickly than granitic rocks.
Granitic rocks are more dense and cool more quickly.
Granitic rocks and basaltic rocks both are very dense and cool quickly.
Answers
Answer:
a Basaltic rocks are more dense and cool more quickly than granitic rocks.
if you drop a human cell into pure water in a petri dish, water molecules will pass into the cell membrane, causing the cell to swell or sometimes even burst if it has no active mechanism to expel the water. what process is happening here?
Answers
The process is happening when we drop a human cell into pure water in a petri dish, water molecules will pass into the cell membrane is osmosis.
Osmosis is the spontаneous net movement or diffusion of solvent molecules through а selectively permeаble membrаne, in the direction thаt tends to bаlаnce the solute concentrаtions on the two sides, from а region of high wаter potentiаl (region of lower solute concentrаtion) to а region of low wаter potentiаl (region of higher solute concentrаtion).
In the case above, a human cell isа region of high wаter potentiаl and pure water is а region of low wаter potentiаl. It makes water molecules will pass into the cell membrane, causing the cell to swell or sometimes even burst if it has no active mechanism to expel the water.
Your question is incomplete, but most probably your full options were
a. metabolism
b. diffusion
c. osmosis
d. cellular respiration
Thus, the correct option is D.
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Florida orange growers often have hundreds of trees in their orchard, similar to those shown here. Florida temperatures can be
mostly tropical or temperate. However, even areas of southern Florida can be exposed to freezing temperatures in the winter.
Suppose that an extreme frost affected an area where the orange orchard is growing. Predict the impacts of this event on the
orange trees. Select ALL that apply.
A)
The trees will undergo mutations that enable them to survive harsher and
colder winters in the future.
B)
This could result in a population bottleneck, where few trees survive,
resulting in lowered genetic diversity
C)
The trees will undergo artificial selection which results in only trees that
are better adapted to freezing temperatures
D)
Trees with the ability to survive the freezing temperatures will reproduce
and create offspring with similar genetic makeup.
E)
The trees in the orchard may all be of similar genetic origin, resulting in a
common tolerance or susceptibility to the freezing weather.
Answers
Answer:B,D,E
Explanation: ur welcome
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The possible impacts include common tolerance or susceptibility, population bottleneck and similar genetic makeup (Options B, D and E).
Common tolerance is due to the selection of trees that are tolerant to these environmental conditions.Population bottleneck is a consequence of the decrease in genetic variability as a consequence of selection.Similar genetic makeup is due to the reduction in genetic variation of the original population.In conclusion, the possible impacts include common tolerance or susceptibility, population bottleneck and similar genetic makeup (Options B, D and E).
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How are crickets similar to other organisms we consume?
please give a really good explanation.
Answers
Answer:
Crickets give you more iron, vitamins, and fiber than another meat. They contain 2 to 3 times more protein than a beef steak.
Explanation:
According to study, the protein in skinless chicken breasts and crickets are similar. This is due to each cricket's protein content, which ranges from 58 to 65 percent.
What crickets similar to other organisms we consume?Crickets provide two to three times as much complete protein per pound as a beef steak.
Eat more crickets to get more iron, minerals, and fiber in your diet. Furthermore, compared to a cow steak, a cricket steak offers a significant environmental benefit.
Warm, damp, shady settings are ideal for cricket growth. Closets, barns, sheds, and patios in the backyard work well for raising them as long as.
You can keep the temperature between 60 and 90 degrees Fahrenheit (ca. 32 °C) (the closer to 90, the quicker they'll breed) and a high humidity level. They provide two to three times as much protein as a beef steak.
Therefore, Crickets give you more iron, vitamins, and fiber than another meat.
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Select the correct answer.
George is a principal scientist in a research organization. He studies the cell culture and genetics of the plants, and he is trying to develop technology that will improve plant production and solve other agriculture related concerns. Which branch of agricultural science is he studying?
A.
greenhouse technology
B.
hydroponics
C.
aeroponics
D.
biotechnology
E.
tissue culture
Answers
Answer:
D
Explanation:
Answer:
your answer is E. tissue culture 100% sure
Explanation:
plato
How does a cell wall compare to a cell membrane?
The cell wall determines which materials can move in and out of plant cells, and the cell membrane provides structural support for animal cells only.
The cell wall provides structural support for plant cells, and the cell membrane determines which materials can move in and out of both plant and animal cells.
The cell wall provides structural support for animal cells, and the cell membrane determines which materials can move in and out of plant cells only.
The cell wall determines which materials can move in and out of both plant and animal cells, while the cell membrane provides structural support for plant cells only.
Answers
Answer:
the 2 pne pretty sure its that
Which structure is derived from the same embryonic source as the dorsal root ganglia?
Answers
The chromaffin cells of the adrenal medulla and the dorsal root ganglia are derived from neural crest cells.
Chromaffin cells (CCs) of the adrenal gland and the sympathetic fearful gadget produce the catecholamines (epinephrine and norepinephrine; EPI and NE) had to coordinate the bodily "fight-or-flight" response to worry, strain, workout, or warfare.
Chromaffin cells of the adrenal medulla are innervated through the splanchnic nerve and secrete adrenaline (epinephrine), noradrenaline (norepinephrine), a few dopamine, enkephalin and enkephalin-containing peptides, and some other hormones into the blood circulation.
Chromaffin cells make epinephrine (adrenaline) and norepinephrine (noradrenaline). they're located in the adrenal glands or in agencies of nerve cells known as ganglia.
The chromaffin cells are derived from neural crest cells and especially differentiated into varieties of cells, epinephrine (E) (adrenaline)-storing and norepinephrine (NE) (noradrenaline)-storing cells.13-Mar-2012
Chromaffin cells (CCs) of the adrenal gland and the sympathetic worried device produce the catecholamines (epinephrine and norepinephrine; EPI and NE) needed to coordinate the physical "fight-or-flight" response to fear, stress, exercise, or conflict.
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PLZ HELP I WILL GIVE 25 POINTS AND BRAINLIEST!
Answers
Answer: C
Explanation:
complete mitosis in shorter time
I really need to know this pls help me
Answers
If pyruvate processing is blocked, what will happen to the levels of oxaloacetate and citrate in the citric acid cycle?.
Answers
There will be an increase in oxaloacetate and a decrease in citrate.
What happens if a cell doesn't have enough oxaloacetate?Since pyruvate cannot produce oxaloacetate, it is diverted to alternative pathways instead, which result in the production of lactic acid and alanine. Oxaloacetate is necessary for the urea cycle and gluconeogenesis to occur.
The citric acid cycle's importance of oxaloacetate is explained.Response and Justification: One of the crucial intermediates of the Krebs cycle is oxaloacetate. It reacts with acetyl-CoA to produce citrate as a byproduct.
When the citric acid cycle is complete, what happens to the malate or oxaloacetate?Malate is dehydrogenated to create the new oxaloacetate required for the cycle's final reaction, which allows acetyl coA to enter.
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Can someone help me
Answers
But it looks like some type of euglenoid because it has an eyespot and a flagellum which is something that most plant cells don’t have
a jellylike fluid inside the cell in which the organelles are suspended is called?
Answers
The jelly-like fluid that fills the cell in which the organelles are suspended is known as cytoplasm.
What is cytoplasm?
The term "cytoplasm" refers to the area in a cell where organelles are suspended. It's a mixture of water, salt, and organic molecules. The organelles and cytosol, a jelly-like substance that fills cells, make up the cytoplasm.
The cytoplasm is where metabolic processes occur, and it can be divided into two parts: cytosol and organelles.
The cytosol is a clear, gel-like substance that makes up the bulk of the cytoplasm. It contains salts, ions, and enzymes that assist in metabolic activities. The cytosol has a variety of functions, including protein synthesis, waste removal, and metabolic processing of nutrients.The organelles, such as mitochondria, endoplasmic reticulum, and ribosomes, are suspended in the cytosol. They are the "organs" of the cell, each with its unique function. Mitochondria generate most of the chemical energy needed to power the cell's biochemical reactions. The endoplasmic reticulum serves many roles in the cell including calcium storage, protein synthesis and lipid metabolism. Ribosomes are the site of protein synthesis in the cell.Learn more about cytoplasm here: https://brainly.com/question/174023
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20 características de la giardia lamblia
Answers
Answer:
434234
Explanation:
Arrange the following items in the correct order
1.
2.
3.
4.
5.
RNA polymerase finds promotor
RNA polymerase adds new nucleotides
RNA polymerase unwinds strand
transcript is released
RNA polymerase reaches termination site
SUBMIT
Answers
Answer:
1.) RNA polymerase find promotor
2.) RNA polymerase unwinds strand
3.) RNA polymerase adds new nucleotides
4.) RNA polymerase reaches termination site
5.) Transcript is released
The correct order is 1. RNA polymerase unwinds the strand, 2. RNA polymerase finds promoter, 3. RNA polymerase adds new nucleotides, 4. The transcript is released, 5. RNA polymerase reaches the termination site.
The process of transcription involves the synthesis of RNA from a DNA template.
RNA polymerase unwinds strand: RNA polymerase recognizes the DNA strand that needs to be transcribed and unwinds the double helix, separating the two DNA strands.
RNA polymerase finds promoter: RNA polymerase searches for and binds to a specific DNA sequence called the promoter, which marks the starting point for transcription.
RNA polymerase adds new nucleotides: Once bound to the promoter, RNA polymerase begins moving along the DNA strand, reading the template strand and adding complementary RNA nucleotides. This process is known as elongation.
The transcript is released: As RNA polymerase moves along the DNA template, it continues adding nucleotides to the growing RNA molecule. Eventually, it reaches a termination site on the DNA, signaling the end of the gene or region being transcribed. At this point, the RNA polymerase releases the completed RNA transcript.
RNA polymerase reaches the termination site: The termination site is a specific DNA sequence that signals the end of transcription. Once RNA polymerase reaches this site, it detaches from the DNA template, and the RNA transcript is released.
Thus, the correct order is 1. RNA polymerase unwinds the strand, 2. RNA polymerase finds promoter, 3. RNA polymerase adds new nucleotides, 4. The transcript is released, 5. RNA polymerase reaches the termination site.
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Chimpanzee communication involves different combinations of sounds. What are some examples of these sounds?.
Answers
Different combinations of sounds, including grunts, pants, and hoots, are used by chimpanzees to communicate. Chimps communicate with other chimps by making simple gestures like waving their hands in their general direction or reaching out their hands pleadingly for assistance.
They then rely on the other animal's intelligence to assess the situation and respond. Even some chimpanzees learn to create their own unique signals. A "woo" is unmistakably a response to a threat, but panted grunts are typically submissive greetings. A chimpanzee's grunt almost always denotes the presence of food. And a recent study found that chimpanzees can put these sounds together in different ways to create "sentences" that have varied meanings.
Thus, we can conclude that chimpanzees employ a variety of sound combinations, such as grunts, pants, and hoots, to communicate.
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