Question
What describes the structure of proteins?
I. Proteins are made from amino acids linked together by peptide bonds.
II. The sequence of amino acids in all proteins is the same.
III. A protein may consist of more than one polypeptide.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
▶️Answer/Explanation
Ans. B
Question
People who suffer from night blindness cannot see well at night because their retinal cells produce an abnormal form of a protein pigment. Which protein is this?
A. Fibrin
B. Myosin
C. Rhodopsin
D. Immunoglobulin
Answer/Explanation
Ans: C
Question
What is the minimum number of nucleotides needed to code for a polypeptide composed of 210 amino acids?
A. 70
B. 210
C. 420
D. 630
Answer/Explanation
Ans: D
Question
Which reaction occurs when a dipeptide is formed from amino acids?
A. Hydrolysis
B. Condensation
C. Transcription
D. Oxidation
Answer/Explanation
Ans: B