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slamgirl [31]
3 years ago
7

Which one of the following enzymes of nucleotide metabolism is correctly paired with its pharmacologic inhibitor?

Biology
1 answer:
aivan3 [116]3 years ago
7 0

Answer:

A. Dihydrofolate reductase—methotrexate

Explanation:

Dihydrofolate reductase is an enzyme that reduces dihydrofolic acid to tetrahydrofolic acid. Methotrexateis its inhibitor. It interferes with folate metabolism by acting as a competitive inhibitor of the enzyme.

Since folateis necassary for rapid dividing cells, such as cancer cells, methotrexate can be used as anticancer drug that inhibits DHFR.

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Which of the following statements about apoptosis is false? a. It is an important process in the development of human fingers an
spin [16.1K]

Answer:

C) Because apoptosis genes kill cells, natural selection is seldom involved in apoptosis pathways.

Explanation:

Apoptosis is a natural process taking in the cell which causes the physiological and biochemical changes in the cell which could cause the death of the cell.

The apoptosis is controlled at the genetic level therefore apoptosis is also known as the programmed cell death.

The studies have shown that the process is involved in the development of the finger and the toes in humans and the sequences controlling the process has been conserved during the evolution in a different organism.

This shows that humans and nematode have the same conserved sequence of apoptosis but the natural selection does not control the apoptosis.

Thus, the selected option is the correct answer.

5 0
3 years ago
Six million years ago, hominids had ____________ compared to present-day hominids.
Inessa [10]
I believe the answer is a
7 0
3 years ago
What is the relationship between proto-oncogenes and oncogenes? hints what is the relationship between proto-oncogenes and oncog
Elan Coil [88]
Oncogenes result from turning on, or activating proto oncogenes. Proto oncogenes are genes that code for positive cell cycle regulators, so proto oncogenes code for proteins that turn on cell division. Proto oncogenes are normal genes, but when they are mutated, they become oncogenes.  Oncogenes are expressed too much, which makes them  turn on cell division too much, which is cancer. 
7 0
4 years ago
Identify a scenario where an experiment would be replicated
Vsevolod [243]

Answer:

If you did not follow the procedure as you should have.

Explanation:

You may have to repeat an experiment for several reasons. It can be because you need to be certain of the results so that you have to perform it several times. Or you need more precise results so that you can fine-tune the variables and repeat the experiment again.

The most common scenario where an experiment would be replicated would be in a situation where you did not follow the procedure that you have outlined exactly like you should have so that the results you got are not 100% reliable. In such a case, the experiment would need to be replicated for the correct results.

I hope this answer helps.

3 0
3 years ago
Which taste receptor are most concentrate at the back of the tongue
r-ruslan [8.4K]

Sour receptors occur primarily along the sides of the tongue and are stimulated mainly by acids. Salt receptors are most common in the tip and upper front portion of the tongue. They are stimulated mainly by inorganic salts. Bitter receptors are located toward the back of the tongue

hopefully this helps but i could be really wrong lol


7 0
3 years ago
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