Answer:
S phase
Explanation:
In the eukaryotic cell cycle, chromosome duplication occurs during "S phase" (the phase of DNA synthesis) and chromosome segregation occurs during the "M phase" (the mitosis phase). During S phase, any problems with DNA replication trigger a ‘'checkpoint" — a cascade of signaling events that put the phase on hold until the problem is resolved. The S phase checkpoint operates like a surveillance camera; we will explore how this camera works on the molecular level. The last 60 years of research in bacterial species (specifically, Escherichia coli) and fungal species (specifically, Saccharomyces cerevisiae), have continually demonstrated that several major processes during DNA replication are evolutionarily conserved from bacteria to higher eukaryotes.
Amongst the array of proteins at the replication fork, DNA polymerases are central to the process of replication. These important enzymes can only add new nucleoside triphosphates onto an existing piece of DNA or RNA; they cannot synthesize DNA de novo (from scratch), for a given template. Another class of proteins fills this functional gap. Unlike DNA polymerases, RNA polymerases can synthesize RNA de novo, as long as a DNA template is available. This particular feature of de novo synthesis is similar to what happens during mRNA transcription.
I hope this helps and answers your question I hope this is the answer you were looking for! Have a great day!
We have to add s phase in the process of cell cycle at which the enzyme DNA polymerase have the significant role.
What is cell cycle?Cell cycle is the process of regenerating new cells by dividing the existing cell through several stages namely prophase, telophase, s-phase etc. Both prokaryotes and eukaryotes undergo cell division and produce the identical daughter cells.
Between G1 phase and G2 phase, the cell cycle's S phase (also known as the "synthesis phase") is when DNA replication occurs. [1] Since precise genome duplication is essential for effective cell division, the S-phase mechanisms are strictly regulated and highly conserved.
One nucleotide at a time, DNA polymerase adds nucleotides to the three prime (3')-end of a DNA strand. DNA polymerases are necessary to replicate the cell's DNA during cell division in order for a copy of the original DNA molecule to be transferred to each daughter cell. Genetic information is transmitted in this manner from one generation to the next.
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Imagine a chromosome that has alleles ""r"" and ""g"" on it. The homologous chromosome has different versions of these genes and contains the ""r"" and ""g"" versions. What are the possible gamete combinations that can occur?.
Imagine a chromosome that has alleles ""r"" and ""g"" on it. The homologous chromosome has different versions of these genes and contains the ""r"" and ""g"" versions. The possible gamete combination that can occur is RrGg.
In the field of science, homozygous chromosomes can be described as chromosomes that have the same alleles for a gene, On the other hand, heterozygous chromosomes have different alleles for a gene.
According to the question above, the homologous chromosomes have different versions of the genes. This means that one of the chromosomes would have 'R' allele and the other 'r'. Similarly, there will one 'G' allele and the other will be 'g' allele.
The gamete combination for such chromosomes will be RrGg.
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Some internal environmental factors may interfere with the ability of an enzyme to function efficiently. Explain why changing the shape of an enzyme could affect the ability of the enzyme to function.
Answer:
internal environmental factors affect the ability of an enzyme to function efficiently.
Explanation:
if the shape changes, it will not fit with the same substrate.the enzymes no longer fits with the molecule with which it is interacted before.shape determines function.
Which of the following is not true about cells?
Which of the following is not true about cells?
All living cells always come from other living cells.
All living thing begins life as a single cell.
It takes many cells to make a living organism.
The cell is the basic unit of the structure and function of life.
Answer:
all living thing begins life as a single cell is false statement
What three different types of atoms, or elements, are present in monosaccharides?
Like all carbohydrates, a monosaccharide consists of three chemical elements: carbon, hydrogen, and oxygen. It is the simplest type of carbohydrate molecule and often serves as the basis for forming more complex molecules. Monosaccharides include aldoses, ketoses, and their derivatives.
I NEED HELP THIS IS TIMED
Select from the drop-down menus to label the a, b, and c parts of the bony fish.
Answer: WHat are the choices
Explanation:
Anyone know? The correct answer!!
Answer:
Carbon dioxide water and energy
Among deaf people, neurons in the temporal lobe that might normally process auditory stimuli take on new functions. this best illustrates?
Among deaf people, neurons in the temporal lobe that might normally process auditory stimuli take on new functions. This best illustrates plasticity.
Neurons are also called nerve cells. These are the longest cell of the body that functions to relay signals all across the body. The structure if a neuron comprises of a cell body, dendrites, axon and axon terminal.
Plasticity of the brain is its ability to modify or re-build its connections. This is a common functions observed in the brain during its development. The experiences, learning, memory retention, etc. are the activities that aid in the brain plasticity.
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I don’t know why it’s blurry like that but I need help
Answer:
It is Quantitative
Explanation:
Because we're talking about the measurement and it is telling you that the seed is 2mm long. :)
What type of channel opens in response to an action potential arriving at the axon terminal and functions to allow synaptic vesicles to release neurotransmitters?.
Voltage gated Ca2+ channels opens in response to an action potential arriving at the axon terminal and functions to allow synaptic vesicles to release neurotransmitters.
Voltage-gated calcium channels are found in the cell membranes of nerve cells and are responsible for regulating the flow of calcium ions into the cell. These channels open in response to an action potential arriving at the axon terminal, and function to allow synaptic vesicles to release neurotransmitters.
Calcium ions are important for many cellular processes, including muscle contraction, secretion of hormones, and cell signaling. When an action potential reaches the axon terminal, it causes the voltage-gated calcium channels to open, allowing calcium ions to flow into the cell. This influx of calcium ions causes the synaptic vesicles to release their neurotransmitters into the synapse, where they can bind to and activate post-synaptic receptors.
The voltage-gated calcium channels are critical for proper nerve function, and any dysfunction of these channels can lead to serious problems. For example, if the channels do not open properly in response to an action potential, the synaptic vesicles will not be able to release their neurotransmitters, and the nerve cell will be unable to communicate with other cells. This can lead to serious problems, such as paralysis.
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Simple cuboidal epithelia are usually found in areas where secretion and absorption occur. True or false?.
The statement is true that simple cuboidal epithelia are usually found in areas where secretion and absorption occur.
Simple cuboidal epithelia consists if a single layer of cells that are almost equal in length and breadth. The layer consists of various glands and ducts that aid in the process of secretion and absorption. Besides, it also acts to protect the skin and other organs by lining them.
Secretion is the process of releasing some substance from any gland or organ inside the body. It is not necessary that the substance to be secreted is synthesized in the same organ from where it is secreted. The various secretions inside human body are; mucus, digestive juices, hormones, etc.
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In familial hypercholesterolemia, individuals with two abnormal alleles die of heart attacks in childhood, those with only one abnormal allele typically die as young adults, and those with two normal alleles have normal life expectancies. This exemplifies __________.
In familial hypercholesterolemia, individuals with two abnormal alleles die of heart attacks in childhood, those with only one abnormal allele typically die as young adults, and those with two normal alleles have normal life expectancies. This exemplifies C. incomplete dominance
In the field of genetics, the phenomenon of incomplete dominance can be described as the one in which the dominant allele does not have the ability to completely mask the recessive allele. As a result, an intermediate species is formed that is different from both the homozygous dominant and homozygous recessive types.
In familial hypercholesterolemia, incomplete dominance is shown by young adults who have one healthy and one abnormal allele. As a result, these young adults are able to survive till a young age. On the contrary, the individuals with both abnormal alleles die during childhood and those with both normal alleles live a normal life.
Although a part of your question is missing, you might be referring to this question:
In familial hypercholesterolemia, individuals with two abnormal alleles die of heart attacks in childhood, those with only one abnormal allele typically die as young adults, and those with two normal alleles have normal life expectancies. This exemplifies __________.
A. penetrance
B. codominance
C. incomplete dominance
D. complete dominance
E. pleiotropy
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(f) A man has a head injury.
He staggers and sways as he walks.
Suggest which part of his brain has been damaged.
Answer:
CerebellumThe cerebellum is primarily responsible for muscle control, including balance and movement. It also plays a role in other cognitive functions such as language processing and memory.
Which factors could cause emphysema?
i. air pollution
ii. genetic predisposition
iii. tobacco smoke
a. i and ii only
b. i and iii only
c. ii and iii only
d. i, ii and iii
The factors that can cause emphysema are air pollution, genetic predisposition and tobacco smoke. The correct option is d.
What is emphysema?Emphysema is a type of lung disease that causes shortness of breath. The air sacs in the lungs (alveoli) are damaged in people with emphysema.
The inner walls of the air sacs weaken and rupture over time, resulting in larger air spaces rather than many small ones.
Emphysema is usually caused by long-term exposure to irritants that damage your lungs and airways.
People who are born with a genetic mutation that causes an alpha-1 antitrypsin deficiency are predisposed to an early form of emphysema as well as liver cirrhosis.
Thus, the correct option is d.
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83. a factor x assay has the following results: 1:10 dilution: 50% 1:20 dilution: 77% 1:40 dilution: 127% these results indicate the presence of: a. factor deficiency b. clotted sample c. inhibitor d. bad draw
These results indicate the presence of Inhibitor.
Enzyme inhibitors are substances that alter the enzyme's catalytic capabilities. As a result, they reduce the enzyme's ability to catalyze reactions or, in extreme circumstances, completely halt them. These inhibitors function by obstructing or changing the active site. For instance, lactose is the name of the sugar present in milk.
Active Site- The term "active site" describes the particular area of an enzyme where a substrate attaches and catalysis or a chemical reaction takes place. When an enzyme reacts with a protein, a structural component of the protein controls whether it is functional or not.
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A biologist discovers a new signal transduction pathway in fruit flies that involves a protein kinase cascade. As part of a grant proposal he writes to obtain funding for further work on this pathway, the biologist proposes research to look for phosphatase enzymes. Why?.
NEED HELP ASAP
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place the following in increasing order: bacterium, atomic nucleus, red blood cell,cellular nucleus,thickness of plasma membrane, carbon atom
NO LINKS PLEASEE
Answer: bacterium, nucleus, secretory granule, red blood cell, human ovum, eukaryotic cell, thickness of plasma
Explanation:
Which geographic distribution is a result of a limit of resources and equally separated individuals where they keep their own space?
A. clustered
B. random
C. clumped
D. uniform
A uniform distribution is a result of limit of resources and equally separated individuals where they keep their own space.
What is an uniform distribution?Basically, an uniform distribution refers to the natural arrangement and apportionment of the various forms of animals and plants in the different regions and localities of the earth. The basic types of population distribution within a regional range are uniform, random, and clumped distribution.
The individuals of a population are spaced in different ways which is called dispersion patterns but in an uniform dispersion, the individuals are evenly spaced. Therefore, the uniform distribution is a result of limit of resources and equally separated individuals where they keep their own space. Therefore, the Option D is correct.
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What term describes a developing organism between the three and eight weeks following conception in humans?
The term that describes a developing organism between the three and eight weeks following conception in humans is Embryo.
An embryo is the first stage of a multicellular organism's development. Embryonic development is the phase of the life cycle that starts right after the male sperm cell fertilizes the female egg cell in sexually reproducing animals. The consequence of the union of these two cells is a single-celled zygote that divides numerous times to give rise to blastomere cells.
The term "embryo" usually refers to a developing human until the ninth week after conception, at which point the term "embryo".The term "embryo" can refer to any early developmental or life cycle stage that occurs before birth or hatching in other multicellular animals.
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PLEASE ANSWER SOON BIO HW, real answers only thanks
The reactants of hydrolysis are triglycerides, polypeptides, DNA and RNA, and polysaccharides
The products of hydrolysis are fatty acids, glycerol, monosaccharides, nucleotides, and amino acids.Understanding the reactants and products of hydrolysis.It follows that whenever water molecule reacts with a macromolecule, the water molecule breaks and its bond splits to form a union with another chemical species. These species which are mentioned above are macromolecules which are also reactants involved in hydrolysis.
Generally, in hydrolysis, smaller molecules are generated from large and complex molecules by breaking the bonds that join them.
Hydrolysis is if economic importance simply because it helps in digestion of food substances.
In conclusion, the macromolecules such as polypeptides, polysaccharides and others are involved in hydrolytic reactions.
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Help please. Image is attached , Thanks!
Answer:
9. 2,240
10.272
11.6%
12.40g
13.24g
Explanation:
serving size is one oz so take serving size x how many ounces your told to eat= answer
Skeletal and cardiac muscle cells store calcium in extensive networks of which organelle?.
Skeletal and cardiac muscle cells store calcium in extensive networks of smooth ER.
Cardiac muscles are those that build up the heart. These muscles have the ability of auto-rhythmicity. Thus means that they can perform movements on their own. Cardiac muscles are also called involuntary muscles, because they do not move according to the wish of the individual.
Smooth ER is the one that does not have ribosomes attached on its surface. It acts as a reservoir for storing the calcium ions inside the cell. These calcium ions are transported to the cell organelle by active transport and release by the signals of hormones.
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If heavy exercise produces lots of co2 in the body, will the blood become more acid or more basic?.
Answer: Acidic
Explanation: The pH of the blood is normally 7.35 to 7.45 – a narrow range. During exercise, the concentration of carbon dioxide in the blood and respiring tissues increases. This could lower the pH (making the blood more acidic). I hope this helps <3
Using cause and effect statement explain the cause of limited cell size
Answer: Cell size is limited due to the inability of very large cells to provide nutrients and water and remove wastes in an efficient manner. The size of a cell is limited by the relationship of the cell's outer surface area to its volume or its surface area-to-volume ratio. Thus,
Explanation:
Large cells can't efficiently supply nutrients, water, and wastes. Surface area-to-volume ratio limits a cell's size.
What causes limited cell size?
The surface volume ratio is the one and only factor that regulates the maximum size of the majority of the cell. The nucleo-cytoplasmic ratio, which controls the range of control of the metabolic ratio and the ratio of surface to volume, places a ceiling on the size of the cell. This ceiling is set by the nucleo-cytoplasmic ratio.
Because they are so little, cells are able to make the most of the surface area to volume ratio they possess. When compared to larger cells, smaller cells have a higher ratio, which means that they are able to transport a greater number of molecules and ions across the cell membrane for each unit of cytoplasmic volume. The reason that cells are so little is because they have to be able to quickly take in nutrients and release waste products.
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Endocytosis is the process of taking vesicles into the cell using?
Answer: Endocytosis
Explanation: the process of capturing a substance or particle from outside the cell by engulfing it with the cell membrane, and bringing it into the cell. Exocytosis describes the process of vesicles fusing with the plasma membrane and releasing their contents to the outside of the cell.
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Cellular respiration is an exothermic reaction and photosynthesis is an endothermic reaction. How does the required activation energy compare for these two reactions?
Photosynthesis needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Cellular respiration needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Photosynthesis needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Cellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Answer:
I think it is either a or c
Explanation:
According to the passage, when lymph nodes swell, it is often a sign that
A
B
C
D
your skin fought off pathogens that tried to enter your body.
BACK
your body is fighting against germs that it thinks are invaders.
your level of lymph is low and so the body is working hard.
your body is not producing enough lymphocytes.
Answer:lymph nodes are located in several parts of body to help fight against pathogens.
Explanation:
they contain immune cells that can help fight infection by attacking or destroying germs that are carried in through the lymph fluid.
how do i mark people brainlest
Answer:
Explanation: If two people had given you an answer to your question, then there is a option to mark ONE of them as brainliest. Click on the option “mark as brainliest” near the answer u like most. If only one person gave a answer then after some time u will receive a notification that u can mark their answer an brainiest. In which u just repeat the step of clicking on “mark as brainiest”
You start with 100 units of protein activity and 100 grams of total protein. After the first centrifugation step, you have 15% less activity and 80% less total protein. What is your fold-purification of the target protein?.
Fold-purification of the target protein is mathematically given as
Fold= 4.25
This is further explained below.
What is your fold-purification of the target protein?.Generally, the equation for Specific activity is mathematically given as
x= Activity (units)/Protein (mg)
Therefore
X= 100/100000
X= 0.001
After centrifugation
X'= 85/20000
X'= 0.00425
Generally, the equation for Fold is mathematically given as
[tex]Fold= \frac{x'}{x}[/tex]
Fold= 0.00425/0.001
Fold= 4.25
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During photosynthesis, where do sugars like glucose eventually form in a plant cell?
Choose 1 answer:
(Choice A)
Chloroplast; thylakoid membrane
(Choice B)
Mitochondrion; stroma
(Choice C)
Chloroplast; grana
(Choice D)
Chloroplast; stroma
Answer:
(Choice C)
Chloroplast; grana
Explanation:
in determining their composition, they were told they are polypetides formed into sphercal shapes which were mostly soluble in water. they concluded that these antibodies were
In determining their composition, they were told they are polypetides formed into sphercal shapes which were mostly soluble in water. they concluded that these antibodies were globular protiens.
What is globular protiens?The term "globular protein" is fairly old (dating likely from the 19th century) and is now somewhat obsolete given the hundreds of thousands of proteins and more sophisticated and descriptive structural motif vocabulary. Only by using ultracentrifuges or dynamic light scattering techniques can the globular nature of these proteins be identified without the use of contemporary methods.
By virtue of the protein's tertiary structure, the spherical structure is induced. Apolar (hydrophobic) amino acids are bonded inside the molecule, whereas polar (hydrophilic) amino acids are bound outside. This allows for dipole-dipole interactions with the solvent, which explains why the molecule is soluble.
The free energy released when a protein folds into its native shape is relatively low, which makes globular proteins only weakly stable.
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