How many different amino acids are responsible for making up the thousands of different proteins found in a cell?
3
15
thousands
4
20

20 amino acids.

Explanation:

Amino acids are the monomers that combine together to form a protein. Two main types of amino acids are non- essential amino acids and essential amino acids.

Thousands of different proteins can be made by the simple 20 amino acids present in the cell. The amino acids can combine in different ways to form all the proteins present in the body.

Thus, the correct answer is option (5).

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

preservation because he preserves part of the land and preserves means save

explanation: