Answer:
<u>B) 3 amino acids joined by 2 peptide bonds</u>
Explanation:
The general formula of amino acids:
<u>R-CH(NH2)-COOH </u>
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.
<u>Peptide bond: </u> a bond formed between first carbon of one amino acid and nitrogen of another amino acid releasing a water molecule( H2O).
The lac genes encoding enzymes are lacZ, lacY, and lacA. The fourth lac gene is lacI, encoding the lactose repressor—"I" stands for inducibility. One may distinguish between structural genes encoding enzymes, and regulatory genes encoding proteins that affect gene expression.
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