11. The movement of molecules across a membrane by passive transport does not require
A. an input of metabolic energy
B. internal energy
C. vibrational energy
D. none of these
12. Peptidoglycan is a complex consisting of
A. oligo-saccharide and protein
B. polysaccharide and protein
C. mono-saccharide and protein
D. amino acid and carbohydrate
13. The mesosomes may be the sites of
A. DNA replication and specialized enzymatic reactions
B. RNA replications and specialized enzymatic reactions
C. RNA replications and specialized cyclic reactions
D. None of the above
14. Which of the following is correct?
A. Peroxisomes have a single boundary membrane
B. Peroxisomes contain enzymes that degrade fatty acids and amino acids
C. The byproduct of given reactions in (b) is toxic to cells
D. All of the above
15. The smooth endoplasmic reticulum (SER) is the site of
A. phospholipid synthesis
B. amino acid synthesis
C. carbohydrate synthesis
D. protein synthesis
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