Answer: I’m not to sure but possibly T-cell
Explanation:
red dwarfs
white dwarfs
neutron stars
black holes
red dawrf
person above me is wrong
Explanation:
right answer is red dawrf
b. Head, thorax, abdomen
c. Mandible, thorax, legs
Answer:
Head, thorax, abdomen
Explanation:
It is correct
Answer:
2 Barr bodies
Explanation:
A Barr body is an inactive X chromosome. The inactive X chromosome is transcriptionally inactive. They derive their name from Murray Barr who discovered them
The Barr bodies are usually visible in humans with more than one X chromosome at interphase during cell division.
For a human male with the chromosome XXXYY, there will be 2 Barr bodies since he has 2 extra X chromosomes.
2. Proteins are usually phosphorylated at amino acids that have hydroxyl group-containing side chains.
3. Phosphorylation always decreases the activity of the enzyme.
4. Proteins are usually phosphorylated at the N terminus of the chain.
5. Phosphorylation of proteins is catalyzed by phosphatases.
Answer:
Proteins are usually phosphorylated at amino acids that have hydroxyl group- containing side chains. Other statements are false. Thus, Option 2 is only true.
Explanation:
Proteins are usually phosphorylated at amino acids that have hydroxyl group- containing side chains which are Serine, Threonine and Tyrosine. Thus, the statement is true.
Phosphorylation can enhance or inhibit the activity of an enzyme but cannot activate enzymes. Therefore, the statement is false.
Phosphorylation can enhance or inhibit the activity of an enzyme but cannot activate enzymes. Thus, phosphorylation does not always decreases the activity of an enzyme.
Phosphorylation at the termini I.e., N terminus of a protein chain is relatively rare and usually involves other types of modification.
Phosphorylation of proteins is catalysed by enzymes called protein kinases. Thus, this statement is also false.
To know more about Phosphorylation,
Phosphorylation of proteins can either activate or inhibit protein function, depending on the specific context and the protein involved. Proteins are usually phosphorylated at amino acids that have hydroxyl group-containing side chains, such as serine, threonine, and tyrosine.
Phosphorylation is a common post-translational modification of proteins, where a phosphate group is added to specific amino acid residues. It is catalyzed by enzymes called kinases, which transfer a phosphate group from ATP to the target protein. Proteins can be phosphorylated at various amino acids, including serine, threonine, and tyrosine. This modification plays a crucial role in regulating protein function and cellular processes.
Contrary to statement 1, phosphorylation does not always activate enzymes. It can have diverse effects on protein activity, stability, localization, and interactions with other molecules. Depending on the specific context and the protein involved, phosphorylation can either activate or inhibit protein function.
Statement 2 is true. Proteins are usually phosphorylated at amino acids that have hydroxyl group-containing side chains, such as serine, threonine, and tyrosine.
Statement 3 is false. Phosphorylation does not always decrease the activity of the enzyme. It can have both activating and inhibitory effects on protein function.
Statement 4 is false. Proteins are not usually phosphorylated at the N terminus of the chain. Phosphorylation can occur at various amino acids throughout the protein sequence.
Statement 5 is false. Phosphorylation of proteins is catalyzed by enzymes called kinases, not phosphatases. Phosphatases are responsible for removing phosphate groups, reversing the phosphorylation.
Learn more about phosphorylation of proteins here:
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b.a higher surface area/volume ratio than the parent cell
c. more DNA in its nucleus than the parent cell
d.less DNA in its nucleus than the parent cell
The surface area to volume ratio will be higher as compared to the parent cell after cell division. Hence, option B is correct.
Further Explanation:
Cellular division is known to be the process through which the parental cell segregates into two or more daughter cells. This process generally occurs as a segment of a larger cell cycle. It comprises of 2 main stages, interphase and M-phase. Interphase is further segregated into:
M phase or mitotic phase is the next stage after interphase and is segregated into 4 phases:
During cellular division, the cell segregates into 2 daughtercells and as the cell becomes larger, the volume elevates rapidly as compared to its surface area. Hence, option B is correct. The reduction in the cell’s ration of the volume to surface area makes it difficult for the cell to transport the required substances in and move out the waste products quickly enough for the cell to survive.
Learn More:
Answer Details:
Grade: High school
Subject: Biology
Chapter: Cell Division
Keywords:
Cell division, cellular division, interphase, cell cycle, metaphase, M phase, G1 phase, prophase, G2 phase, telophase, S phase, anaphase, surface area, volume, ratio.
OPTION A.
After cell division, each daughter cell has a higher surface area/volume ratio than the parent cell. This is due to the division resulting in two smaller cells with same DNA content. This increased ratio is beneficial for the exchange of material across cell membrane.
After cell division, each daughter cell has a higher surface area/volume ratio than the parent cell. When a cell divides, it splits into two smaller cells, reducing the volume but not reducing the surface area in the same proportion. This results in each daughter cell having a larger surface area relative to its volume. This increased ratio is important because it allows for more efficient exchange of nutrients and waste products across the cell membrane.
The amount of DNA in each daughter cell is the same as in the parent cell because during cell division, the DNA is copied and then distributed evenly between the two resulting cells. Therefore, option c and d are incorrect.
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