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Snezhnost [94]
3 years ago
10

Tight junctions ______________________.

Biology
1 answer:
Nuetrik [128]3 years ago
3 0
<span>c. are formed from claudins and occludins.</span>
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Which of these does NOT greatly affect climate?
finlep [7]

Answer:

D...

Explanation:

8 0
2 years ago
Suppose that a certain gene functions to enforce a checkpoint on the cell cycle. A mutation causing the loss of this gene's func
chubhunter [2.5K]

Answer:

The correct answer is C. be more likely to have cancer at some point in his/her life.

Explanation:

Cell cycle checkpoints are controlled by different proteins which are coded by different genes. They are important in cell cycle regulation and stops cell cycle immediately if they find any problem in the cell like mutation.

The cell cycle will not be continued if the problem does not solve and cell death will occur which prevents cancer by preventing the mutation to spread into new cells.  

Therefore if a mutation occurs in certain genes that enforce a checkpoint on the cell cycle then the mutated gene will pass in new cells and the mutated cells will grow uncontrollably due to no checkpoints so the person will probably have cancer at some point in his or her life.

7 0
3 years ago
Compared with a eukaryotic cell, a prokaryotic cell Select one:______
juin [17]

Answer:

The correct option is a. lacks organelles beyond ribosomes.

Explanation:

All cells of higher organisms are bounded by a cell membrane (also called plasma membrane or plasmalema) and contain cytoplasm that surrounds one or more nuclei. Within the cytoplasm there are structures known as organelles, which are specialized in carrying out the metabolic processes of the cell, these cells are called eukaryotes. The prokaryotes are smaller, lack a differentiated nucleus and organelles. The prokaryotic cells are not internally divided by membranous walls, but consist of a single space.

Both prokaryotic and eukaryotic cells contain ribosomes. Ribosomes are organelles not delimited by membranes, these organelles are important since a cell makes all its proteins in its ribosomes.

8 0
3 years ago
Did alleles for drug resistance occur in bacterial populations that afflict humans
Cerrena [4.2K]

Answer:

Did alleles for drug resistance occur in bacterial populations that afflict humans, prior to the widespread use of antibiotics in medicine and agriculture? a. No—mutations for drug resistance occur in response to antibiotic use. ... Yes—alleles for resistance arise due to random mutation, so are always present.

Explanation:

4 0
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Which component of blood helps fight disease?
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White blood cells fight disease
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