A _______________________ recognizes and destroys cells infected by a virus.

2 answers:

8 0

A cytotoxic T cell recognizes and destroys cells infected by a virus. They are also responsible for killing cancer cells too.

galina1969 [7]3 years ago

6 0

Answer:

c)cytotoxic T cell is the correct answer.

Explanation:

On the surface of the Cytotoxic T cell, TCR's receptors and a cluster of differentiation (CD8) receptors are present.

The cells infected by a virus produce viral proteins and these viral protein are present on their membrane

Cytotoxic T cells kill the virus-infected cell when their receptors TCR's match with the viral antigen and as they recognize the cell infected with the virus they produce cytokines that eliminate the infection.

Thus cytotoxic T cell recognizes and destroys cells infected by a virus.

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The two chickens below are bred together. Which of the following is a possible set of offspring for these parents?One red chicke

GalinKa [24]

The provided question is incomplete as the cross in between parents, however the cross between in red and white bred parents.

Answer:

The correct answer is : five red/white chickens.

Explanation:

Parents should be homozygous for feather color, each offspring will inherit F from one of the parent, and the f allele from parent 2. So, every offspring will have the genotype F and f and will have white and red fathers.

Thus, the correct answer is : five red/white chickens.

7 0

3 years ago

In humans, the antibiotic amoxicillin (a type of penicillin) is used to treat certain bacterial infections. Complete the sentenc

mihalych1998 [28]

Answer:

Amoxicillin inhibits an enzyme required to build cell walls in bacteria.

Since humans have cell membranes, they are unaffected by amoxicillin.

Explanation:

Antibiotics are specifically designed to target bacterial cells, therefore, they don't kill human cells.

Amoxicillin, a type of penicillin, inhibits the biosynthesis of bacterial cell wall. The bacterial cell wall contains peptidoglycan that constitutes almost 95% of the cell wall in some Gram positive bacteria and as little as 5-10% of the cell wall in Gram negative bacteria. Amoxicillin inhibits the cross linkage between the linear peptidoglycan polymer chains that make up a major component of the cell walls of both Gram positive and Gram negative bacteria.