{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).

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

i don’t no. suiopgohjk