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MCQs

Total Questions : 244 | Page 24 of 25 pages
Question 231. The amount of energy received from one ATP is
  1.    760 kcal
  2.    7.3 kcal
  3.    1000 kcal
  4.    76 kcal
 Discuss Question
Answer: Option B. -> 7.3 kcal
Question 232. ATP is from which general category of molecules?
  1.    Nucleotides
  2.    Amino acids
  3.    Polysaccharides
  4.    Proteins
 Discuss Question
Answer: Option A. -> Nucleotides
Question 233. Which of the following is not true of glycolysis?
  1.    ADP is phosphorylated to ATP via substrate level phosphorylation
  2.    The pathway does not require oxygen
  3.    The pathway oxidizes two moles of NADH to NAD+ for each mole of glucose that enters
  4.    The pathway requires two moles of ATP to get started catabo-lizing each mole of glucose
 Discuss Question
Answer: Option C. -> The pathway oxidizes two moles of NADH to NAD+ for each mole of glucose that enters
Question 234. In glycolysis, ATP is formed by the transfer of a high-energy phosphate from 1,3-bisphosphoglycerate to ADR No such high-energy phosphate donor has ever been isolated in mitochondria because
  1.    the techniques for isolating the phosphate donor are not refined enough
  2.    no such phosphate donor exists
  3.    the high-energy phosphate donor is very short-lived and difficult to isolate
  4.    None of these
 Discuss Question
Answer: Option B. -> no such phosphate donor exists
Question 235. The glycolytic pathway (glucose → 2 pyruvate) is found
  1.    only in yeast
  2.    only in eukaryotes
  3.    primarily in animals excluding particles
  4.    in all living organisms
 Discuss Question
Answer: Option D. -> in all living organisms
Question 236. When concentration of the reactants is higher than the equilibrium concentration then
  1.    the gibbs free energy will be positive
  2.    more products will be formed
  3.    the gibbs free energy will be negative
  4.    both (b) and (c)
 Discuss Question
Answer: Option D. -> both (b) and (c)
Question 237. During glycolysis, the major energy generating step involves
  1.    Phosphofructokinase
  2.    phosphoglycerate kinase
  3.    glyceraldehyde-3 -dehydrogenase
  4.    pyruvate kinase
 Discuss Question
Answer: Option C. -> glyceraldehyde-3 -dehydrogenase
Question 238. Which of the following regulates glycolysis steps?
  1.    Phosphofructokinase
  2.    Hexose kinase
  3.    All of these
  4.    Pyruvate kinase
 Discuss Question
Answer: Option C. -> All of these
Question 239. Which of the following could act as an uncoupler of electron transport and ATP synthesis?
  1.    The Fo base-piece of ATP synthase (without the Fl subunit)
  2.    neither (a) nor (b)
  3.    Dinitrophenol
  4.    Both (a) and (b)
 Discuss Question
Answer: Option D. -> Both (a) and (b)
Question 240. Phosphofructokinase, the major flux-controlling enzyme of glycolysis is allosterically inhibited and activated respectively by
  1.    Citrate and ATP
  2.    ATP and ADP
  3.    AMP and Pi
  4.    ATP and PEP
 Discuss Question
Answer: Option B. -> ATP and ADP

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