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MCQs

Total Questions : 244 | Page 19 of 25 pages
Question 181. PCR amplifies millions of copies of
  1.    a short fragment of DNA
  2.    the entire genome (all the DNA in a sample)
  3.    both (a) and (b)
  4.    short chain RNA
 Discuss Question
Answer: Option A. -> a short fragment of DNA
Answer: (a).a short fragment of DNA
Question 182. Diminished flow of blood to tissues is termed as
  1.    Hypoxia
  2.    Ischemia
  3.    Homeostasis
  4.    Metabolism
 Discuss Question
Answer: Option B. -> Ischemia
Answer: (b).Ischemia
Question 183. Which of the following is not a factor determining the activity of an enzyme?
  1.    Association with regulatory protein
  2.    Sequestration
  3.    Allosteric regulation
  4.    Nucleotides
 Discuss Question
Answer: Option D. -> Nucleotides
Answer: (d).Nucleotides
Question 184. Which of the following statements is true about the control of muscle glycogen phosphorylase?
  1.    It is activated by phosphorylation by an active phosphorylase kinase
  2.    It is allosterically activated by ATP
  3.    It is allosterically activated by cAMP
  4.    Normally it exists in active form
 Discuss Question
Answer: Option A. -> It is activated by phosphorylation by an active phosphorylase kinase
Answer: (a).It is activated by phosphorylation by an active phosphorylase kinase
Question 185. Which of the following type of metabolite is used for generating glucose under severe starvation conditions?
  1.    Amino acids
  2.    Fats
  3.    Glycogen
  4.    Starch
 Discuss Question
Answer: Option A. -> Amino acids
Answer: (a).Amino acids
Question 186. Which of the following statements is true?
  1.    High insulin/glucagon ratio activates lipolysis in muscle
  2.    High insulin/glucagon ratio inhibits lipolysis in liver
  3.    High insulin/glucagon ratio activates lipolysis in adipocytes
  4.    Low insulin/glucagon ratio activates lipolysis in adipocytes
 Discuss Question
Answer: Option D. -> Low insulin/glucagon ratio activates lipolysis in adipocytes
Answer: (d).Low insulin/glucagon ratio activates lipolysis in adipocytes
Question 187. Which of the following statements is true regarding acetyl co-A?
  1.    It stimulates pyruvate dehydrogenase
  2.    It stimulates pyruvate carboxylase
  3.    It inhibits pyruvate carboxylase
  4.    It stimulates hexokinase
 Discuss Question
Answer: Option B. -> It stimulates pyruvate carboxylase
Answer: (b).It stimulates pyruvate carboxylase
Question 188. The compounds responsible for coordinated regulation of glucose and glycogen metabolism are
  1.    NADH
  2.    NAD⁺
  3.    Acetyl co-A
  4.    Fructose 2, 6-bisphosphate
 Discuss Question
Answer: Option D. -> Fructose 2, 6-bisphosphate
Answer: (d).Fructose 2, 6-bisphosphate
Question 189. Glucagon and epinephrine stimulate glycogen breakdown to glucose 6-phosphate
  1.    Directly by binding to glycogen phosphorylase
  2.    Indirectly by first stimulating adenylate cyclase to make cAMP
  3.    Only in the liver
  4.    Only in muscle cells
 Discuss Question
Answer: Option B. -> Indirectly by first stimulating adenylate cyclase to make cAMP
Answer: (b).Indirectly by first stimulating adenylate cyclase to make cAMP
Question 190. Which of the following is a potent regulator of glycolysis and gluconeogenesis?
  1.    Fructose 2, 6-bisphosphate
  2.    Fructose 1, 6-bisphosphate
  3.    Fructose 6-phosphate
  4.    Glucose 1, 6-bisphosphate
 Discuss Question
Answer: Option A. -> Fructose 2, 6-bisphosphate
Answer: (a).Fructose 2, 6-bisphosphate

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