{answer quickly! 50 points! }

describe the following protein molecule's structure by its major components.
a) 3 amino acids joined by 3 peptide bonds
b) 3 amino acids joined by 2 peptide bonds
c) 2 amino acids joined by 3 peptide bonds
d) 2 amino acids joined by 2 peptide bonds

give a basic explanation of how you got to your answer.

B) 3 amino acids joined by 2 peptide bonds

Explanation:

The general formula of amino acids:

R-CH(NH2)-COOH

It can be seen clearly in the attached image that there are three amino acid molecules.

Now the three molecules of amino acids are joined by 2 peptide bonds.

Peptide bond:  a bond formed between first carbon of one amino acid and nitrogen of another amino acid releasing a water molecule( H2O).

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

the answer is definitely a