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Pie
3 years ago
5

Cytotoxic T cells recognize and kill host cells infected by viruses. They recognize these cells by the foreign antigen displayed

on the host cell’s:_________.
A. MHC I molecules
B. MHCII molecules
C. toll like receptors
Biology
1 answer:
xenn [34]3 years ago
5 0

Answer:

The correct answer is - A. MHC I molecules

Explanation:

Major histocompatibility complexes (MHCs) are presented to different T cells to identify the antigen on the host or infected cell. There are two MHCs - class I and class II. The class I MHC presents to cytotoxic T cells while MHC II to helper T cells.

A cytotoxic T cell only binds to the infected cell displays the foreign antigen such as viruses on the infected cell surface in order to recognize and kill the cells.

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What did the structure of DNA’s double helix suggest about DNA’s properties? Select all that apply.
givi [52]

Completed part of the questionErrors in copying can result in changes in the DNA sequence that could be inherited by future generation.

Answer:

DNA stores genetic information in the sequence of its bases

DNA can be replicated by making complementary copies of each strand

Errors in copying can result in changes in the DNA sequence that could be inherited by future generation.

Explanation:

<u>the  fact that DNA is located in the Nucleus is not related to double strands.</u>

<u>the DNA csn change is not relevant ,</u>

<u> therefore the above 3 options are the correct answers.</u>

7 0
3 years ago
Cross two pea plants. Both are heterozygous for seed type; round (R) is dominant to wrinkled (r).
Fudgin [204]

Answer: I hope the file helps you out :)

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5 0
2 years ago
The laboratory analysis of a blood or urine sample to determine how much of a certain nutrient is present in the sample is an ex
sertanlavr [38]

Osmolality tests is performed to determine the level of a certain nutrient present in the blood and urine.

What is osmolality test?

Osmolality tests measure the level of certain substances in blood, urine, or stool.

The level of glucose(sugar), urea( waste product made in the liver), sodium, potassium, and chloride are measured in osmolality test.

Osmolality test is also performed to check the balance between water and certain chemicals in blood.

Osmolality test also done to diagnose dehydration .

Therefore,osmolality test is done to determine the level of a certain nutrient in blood or urine sample.

Learn more about osmolality test here:

brainly.com/question/1248783

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3 0
9 months ago
Thymine and cytosine are classified as _____ and have one ring of carbon and nitrogen atoms for each base.
just olya [345]
Thymine and cytosine are classified as "Pyrimidines" and have one ring of carbon and nitrogen atoms for each base.
4 0
3 years ago
Ground pork should be cooked to an internal temperature of _______________ to destroy the parasite Trichinella spiralis.
patriot [66]

Answer:

160°

Explanation:

Ground pork should be cooked to an internal temperature of 160° to destroy the parasite Trichinella spiralis. 160°F (71°C) 89. All of the following are good instructions for preventing foodborne illness except when shopping, select meat, poultry, or fish first.

3 0
2 years ago
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