Carbohydrates And Gycobiology(Biochemistry > Enzymes ) Questions and Answers

Question 1. Enzyme-driven metabolic pathways can be made more efficient by
  1.    concentrating enzymes within specific cellular compartments
  2.    grouping enzymes into free-floating, multienzyme complexes
  3.    fixing enzymes into membranes so that they are adjacent to each other
  4.    All of the above
Explanation:-
Answer: Option D. -> All of the above
Answer: (d).All of the above
Question 2. What is the specificity of the Clostripain protease?
  1.    It cleave after Arg residues
  2.    It cleave after His residues
  3.    It cleave after Lys residues
  4.    None of the above
Explanation:-
Answer: Option A. -> It cleave after Arg residues
Answer: (a).It cleave after Arg residues
Question 3. Which of the following (s) is/are serine proteases?
  1.    Chymotrypsin
  2.    Trypsin
  3.    Elastase
  4.    all of these
Explanation:-
Answer: Option D. -> all of these
Answer: (d).all of these
Question 4. Tryprotophan synthetase of E.coli, a typical bifunctional oligomeric enzyme consist of
  1.    a protein designated A
  2.    two proteins designated A and B
  3.    a protein A and one-subunit a
  4.    a protein designated B
Explanation:-
Answer: Option B. -> two proteins designated A and B
Answer: (b).two proteins designated A and B
Question 5. Which of the following statements about enzymes or their function is true?
  1.    Enzymes do not alter the overall change in free energy for a reaction
  2.    Enzymes are proteins whose three-dimensional form is key to their function
  3.    Enzymes speed up reactions by lowering activation energy
  4.    All of the above
Explanation:-
Answer: Option D. -> All of the above
Answer: (d).All of the above
Question 6. The sugar which forms major component of nucleic acids is
  1.    ribose
  2.    galactose
  3.    mannose
  4.    maltose
Explanation:-
Answer: Option A. -> ribose
Answer: (a).ribose
Question 7. Under aerobic condition pyruvate is converted by pyruvate dehydrogenase to
  1.    phosphoenol pyruvate
  2.    acetyl CoA
  3.    lactate
  4.    glyceraldehyde 3 phosphate
Explanation:-
Answer: Option B. -> acetyl CoA
Answer: (b).acetyl CoA
Question 8. Gluconeogenesis is the
  1.    formation of glycogen
  2.    breakdown of glucose to pyruvate
  3.    breakdown of glycogen to glucose
  4.    synthesis of glucose from non-carbohydrate precursors
Explanation:-
Answer: Option D. -> synthesis of glucose from non-carbohydrate precursors
Answer: (d).synthesis of glucose from non-carbohydrate precursors
Question 9. Which of the following is not a disaccharide?
  1.    Amylose
  2.    Cellobiose
  3.    Lactose
  4.    None of these
Explanation:-
Answer: Option A. -> Amylose
Answer: (a).Amylose
Question 10. Hexokinase activity in glycolysis is inhibited by
  1.    glucose 6- phosphate
  2.    fructose 6-phosphate
  3.    fructose 1,6 biphosphate
  4.    phosphofructokinase
Explanation:-
Answer: Option A. -> glucose 6- phosphate
Answer: (a).glucose 6- phosphate
© Lakshya_Education.com, All Right Reserved.
Contact Us services