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kap26 [50]
2 years ago
11

A B-cell uses its surface antibodies as receptors to attach to specific antigens before they are taken in. By what mechanism doe

s a B cell engulf an antigen
Biology
1 answer:
madam [21]2 years ago
6 0

Answer:

\huge\boxed{\sf Endocytosis}

Explanation:

B-cells engulf an antigen by endocytosis.

<u>Endocytosis:</u>

The process by which cell takes up external materials by fusing them with plasma membrane is called endocytosis.

After engulfing the antigen, B-cells become sensitive to the pathogen.

\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
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In a praticular breed of cattle, a black coat is dominant over a red coat. If a cow with a red coat is crossed with a black bull
steposvetlana [31]
You are correct :) Red coat's genotype would be tt and the black bull's genotype would be Tt. You put those in a punnett square, and you'd get 2 tt's and 2 Tt's. Hope this helps! :D
6 0
2 years ago
To which organelle does a C-terminal signal peptide sequence of the four amino acids KDELdirect peptides?
Fofino [41]

Answer:

Endoplasmic reticulum.

Explanation:

Protein synthesis, sorting and transport is the important mechanism for the synthesis of protein in the body and the transport of the protein to its specific site or organ. The protein must reaches to its final destination for its proper functioning.

KDEL ( K- leucine, D is aspartic acid, E is glutamic acid and L is lysine ) is the stretch of a specific amino acid that are responsible for the protein molecule to target at its specific site. KDEL is specific for the transport of peptides to the endoplasmic reticulum.

Thus, the correct answer is option (A).

7 0
3 years ago
When you exercise you generate excess heat and your body temperature rises. blood vessels dilate in the skin, warm blood flows c
zalisa [80]

Answer:

The  correct answer is negative feedback.

Explanation:

Negative feedback is considered the mechanism that frequently regulates biological reactions in the body. Negative feedback helps reduce the stimulation of some processes, such as controlling the temperature.

It can be seen that negative feedback works by redirecting some processes that go to one point directs a degree of that process to a different location.

In this case, on the temperature, the feedback is responsible for putting the system to work from the moment it starts to sweat using the different processes to regulate the temperature. This process uses help from enzymes and body pathways.

<em>I hope this information can help you. </em>

3 0
3 years ago
I don't know how to edit my original question, so I am resubmitting it. I have attached a photo with my question. I had it attac
Mumz [18]

Answer:

The correct answer is -

A: Prophase  (top left)

B: Cytokinesis  (top middle)

C :Interphase  (top right)

D :Telophase  (bottom left)

E: Metaphase  (bottom middle)

F: Anaphase (bottom right)

Explanation:

A. prophse - the first stage of mitosis, in this pahse the chromatin which is DNA and proteins, condenses in nucleus.

B. Cytokinesis  - It is the physical sepration or dividion of cytoplasm of the parental cell.

C. Interphase - This phase have no change in cell except its size as it grows and enlarges itself.

D. Telophase - formation of a nuclear membrane around chromosome set to separate the genetic material from the cytoplasm.

E. Metaphase - visible chromosomes, removal of nucleus and chromosomes present in cytoplasm.

F. Anaphase - replicated chromosomes are separated and move towards opposite poles.

7 0
3 years ago
The humpback whale can be seen off the coast of Alaska during the summer months, but is found as far south as California and Haw
nydimaria [60]
Question : T<span>he humpback whale can be seen off the coast of Alaska during the summer months, but is found as far south as California and Hawaii during the winter. Why would the humpback whale most likely spend the summer months off the coast of Alaska?

Answer : The humpback whale likes being in the cold like all other fishes.
The humpback whale is usually found around the coast of Alaska because it is a little colder over there. Then in winter it is found around Hawaii and California because the pacific ocean cools down and is not so hot anymore!

-procklown
</span><span>
</span>
7 0
3 years ago
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