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shtirl [24]
3 years ago
12

 Which of the following describe(s) the role of cytotoxic T cells in the specific immune response? I. They kill cancer cells. II

. They kill cells infected by viruses. III. They interact with MHC-I molecules
Biology
2 answers:
Savatey [412]3 years ago
7 0
Kill cells infected by viruses
Murrr4er [49]3 years ago
3 0
The answer is D because it needs 2 and 1 and 3 are the only answers that make sence
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g During the G2 stage of interphase, ___ does not occur. A. organelle replication B. DNA growth C. protein replication D. cell g
ArbitrLikvidat [17]

Answer: DNA growth does not occur

Explanation:

Here, the cell has grown, the DNA has been replicated (this takes place in the S phase of interphase) and its almost time for the cell to divide. Basically, what occurs during the G2 phase (Gap 2 phase of interphase) includes duplication of all proteins and organelles needed later during the process of cell division. Some of these includes assembly of microtubles will later for the spindle structure that that helps in the separation of chromosomes during the M phase but these are produced during the G2 phase.

The cells also continue to increase/grow in size and the volume of the cytoplasm also increase in this phase. There is also a checking where the cell needs to check for the structures and components and to also ensure that they are all present

5 0
2 years ago
16. The method of movement that requires the expenditure of ATP molecules is
stira [4]

Answer:

It is active transport

Explanation:

because the ions are moving against the concentration gradient

3 0
3 years ago
When crossing two individuals, the offspring display only one of the two traits found in parents. Which principle of Mendelian g
Kipish [7]

Complete question:

Question: When crossing two individuals, the offspring display only one of the two traits found in parents. Which principle of Mendelian genetics is supported by this observation?

a) segregation

b) independent assortment

c) dominance and recessiveness

d) allele frequency

Answer:

c) dominance and recessiveness

Explanation:

According to Mendel's principle of dominance and recessiveness, the alleles of one gene may be dominant or recessive in nature. When present together, only the dominant allele is able to express itself. Therefore, a hybrid individual for a gene would express only the dominant phenotype. In the given cross, the progeny express only one of the two traits found in the parents. This means that the progeny is heterozygous for the trait and is expressing the dominant trait. The recessive trait is not expressed due to the presence of the allele for the dominant trait.

7 0
3 years ago
Describe the relationship among proteins, genes, and traits in living organisms.
Mila [183]
Is that they all have the same routine 
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2 years ago
Which type of heat transfer has warm fluids rising and cold fluids sinking?(science)
Eduardwww [97]

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heat transfer in a fluid in which hot fluid rises and cold fluid sinks; setting up a cycle

4 0
2 years ago
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