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MCQs

Total Questions : 20 | Page 2 of 2 pages
Question 11. The movement of molecules across a membrane by passive transport does not require
  1.    internal energy
  2.    none of these
  3.    an input of metabolic energy
  4.    vibrational energy
 Discuss Question
Answer: Option C. -> an input of metabolic energy
Question 12. The smooth endoplasmic reticulum (SER) is the site of
  1.    protein synthesis
  2.    phospholipid synthesis
  3.    amino acid synthesis
  4.    carbohydrate synthesis
 Discuss Question
Answer: Option B. -> phospholipid synthesis
Question 13. Peptidoglycan is a complex consisting of
  1.    mono-saccharide and protein
  2.    aminoacid and carbohydrate
  3.    polysaccharide and protein
  4.    oligo-saccharide and protein
 Discuss Question
Answer: Option D. -> oligo-saccharide and protein
Question 14. The mesosomes may be the sites of
  1.    RNA replications and specialized enzymatic reactions
  2.    None of these
  3.    DNA replication and specialized enzymatic reactions
  4.    RNA replications and specialized cyclic reactions
 Discuss Question
Answer: Option C. -> DNA replication and specialized enzymatic reactions
Question 15. Lysozymes are found in
  1.    plant cells
  2.    microbial cells
  3.    animal cells
  4.    all of these
 Discuss Question
Answer: Option C. -> animal cells
Question 16. Which of the following is not found in membranes?
  1.    Glycolipids
  2.    Phospholipids
  3.    Glycoproteins
  4.    Nucleic acids
 Discuss Question
Answer: Option D. -> Nucleic acids
Question 17. Biological membranes are like water beds because
  1.    the membrane is thin compared to the enclosed volume
  2.    they (normally) do not leak their contents
  3.    they are always moving
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 18. Which type of molecule spans the membrane, from its inner to outer surface according to the Fluid mosaic model of cell membranes?
  1.    Carbohydrate
  2.    Protein
  3.    Phospholipid
  4.    Cholesterol
 Discuss Question
Answer: Option B. -> Protein
Question 19. In membranes, lipids are
  1.    all of these
  2.    glycerophospholipids
  3.    sphingolipids
  4.    sterols
 Discuss Question
Answer: Option A. -> all of these
Question 20. The plasma membrane is a selectively permeable barrier due to presence of specific transport
  1.    proteins
  2.    carbohydrates
  3.    amino acids
  4.    none of these
 Discuss Question
Answer: Option A. -> proteins

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