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ycow [4]
3 years ago
12

What are B memory cells?and why are they important?

Biology
2 answers:
amm18123 years ago
8 0

Answer:

B memory cells are a B cell sub-type that are formed within germinal centers following primary infection.

B cells are important in immune responses against intra-cellular bacterial and viral infections.

Explanation:

B memory cells are formed from B lymphocytes. They are generated in germinal centers.

B cells remain relatively stable for at least 50 years in our body.

B cells have long lifespan, other features also include high sensitivity to low antigen doses, proliferation is fast and strong. B memory cells differentiates fastly into plasma cells. High affinity antibodies are produced from these plasma cells during its secondary response.

grandymaker [24]3 years ago
5 0
B lymphocytes are the cells of the immune system that make antibodies to invading pathogens like viruses. They form memory cells that remember the same pathogen for faster antibody production in future infections.
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Black Boy is a memoir that was written by the author Richard Wright in which he describes in detail what it was like for him growing up in the South as well as moving to Chicago in order to start his career. In this memoir he associates the bitterness and pain he feels over being abandoned by his father with the pain he feels when he is hungry

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which example of a missense mutation in a protein-encoding gene would most likely be a neutral mutation?
KATRIN_1 [288]

An example of a missense mutation in a protein-encoding gene would most likely be a neutral mutation is option B: replacement of a polar amino acid with another polar amino acid at the protein's surface.

A frequent and well-known example of a missense mutation is the blood condition sickle-cell anemia. Missense mutations exist in the DNA at a single location in sickle-cell anemia patients. A different amino acid is required in this missense mutation, which also alters the overall structure of the protein. Similarly, replacement of a polar amino acid by another polar Ami no acid at the protein's surface is a missense mutation causing change in a single site.

A neutral mutation is one whose fixation is unrelated to natural selection. Therefore, the independence of a mutation's fixation from natural selection can be used to define the selective neutrality of a mutation.

To know more about mutations, refer to the following link:

brainly.com/question/20407521

#SPJ4

Complete question is:

Which example of a missense mutation in a protein-encoding gene would most likely be a neutral mutation?

a) Replacement of a polar amino acid with a nonpolar amino acid at the protein's outer surface

b) Replacement of a polar amino acid with another polar amino acid at the protein's surface

c) Replacement of a polar amino acid with another polar amino acid in the protein's interior

d) Replacement of a polar amino acid with a nonpolar amino acid in the protein's interior

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