Metabolism of Carbohydrates MCQs

Set of Important MCQs on Metabolism of Carbohydrates for the preparation of tests for chemistry and biology. 

The key coenzyme for the activity of muscle glycogen phosphorylase is-

  1. Cyclic AMP
  2. NAD
  3. Pyridoxal phosphate
  4. Coenzyme A

Question Answer: Pyridoxal phosphate


Pyruvate is accumulated in case of the dietary deficiency of vitamin.

  1. Thiamine
  2. Folic acid
  3. Cobalamine
  4. Pyridoxine

Question Answer: Thiamine


Which is correct regarding gluconeogenesis?

  1. In mammals, gluconeogenesis occurs predominantly in the liver
  2. It converts glucose to glycogen
  3. It is glycolysis running in opposite direction
  4. Plants do not undertake gluconeogenesis

Question Answer: In mammals, gluconeogenesis occurs predominantly in the liver


Which can be synthesized from pyruvate?

  1. Acetyl CoA
  2. Lactic acid
  3. Ethanol
  4. Both A, B, and C

Question Answer: Both A, B, and C


Glucose 1, 6-Bisphosphate is intermediate in _______.

  1. Glycolytic pathway
  2. Gluconeogenesis pathway
  3. Phosphoglucomutase reaction
  4. Glycogen synthetic pathway

Question Answer: Phosphoglucomutase reaction


Glucose yields how many ATPs by Glycolysis?

  1. 8
  2. 11
  3. 5
  4. 10

Question Answer: 8


The most important regulatory step in glycolysis is:

  1. Formation of fructose-1,6- diphosphate
  2. Formation of glucose-6-phosphate
  3. Formation of fructose-6-phosphate
  4. Formation of glyceraldehydes-3- phosphate

Question Answer: Formation of fructose-1,6- diphosphate


Which of the following is the pathway of conversion of glucose to glycogen?

  1. Glycolysis
  2. Glycogenolysis
  3. Glycogenesis
  4. Gluconeogenesis

Question Answer: Glycogenesis


Which is correct regarding pyruvate dehydrogenase enzyme?

  1. It converts pyruvate to oxaloacetate
  2. It catalyzes oxidative decarboxylation reaction.
  3. it is localized in the cytosol eukaryotic cells
  4. It requires NADH

Question Answer: It catalyzes oxidative decarboxylation reaction


The citric acid cycle is amphibolic pathway, and it can be referred as _____

  1. It is linked to other cycles
  2. It serves in both anabolic and catabolic processes
  3. It can catalyze reactions that are both exergonic and endergonic
  4. It can move in both forward and reverse directions

Question Answer: It serves in both anabolic and catabolic processes


In Which forms is glucose liberated from glycogen?

  1. Glucose-1-Phosphate
  2. Glucose-6-Phosphate
  3. UDP-glucose
  4. Both A, B, and C

Question Answer: Glucose-1-Phosphate


The first reaction in citric acid cycle is _______, which generates citrate.

  1. A condensation reaction
  2. An oxidative decarboxylation reaction
  3. Dehydrogenation reaction
  4. A dehydration reaction

Question Answer: A condensation reaction


Which is correct regarding all the dehydrogenase enzymes that participate in the citric acid cycle?

  1. They catalyze condensation reactions
  2. They generate CO₂
  3. They convert a single bond to a double bond
  4. They generate reduced electron carriers

Question Answer: They generate reduced electron carriers


What role does the coenzyme A play in the citric acid cycle?

  1. It is an acyl group carrier
  2. It carries hydride ions
  3. It is an electron carrier
  4. It is an oxidizing agent

Question Answer: It is an acyl group carrier


Skeletal muscle does not contribute glucose to blood because:

  1. It lacks the enzyme glycogen phosphorylase
  2. It cannot store glycogen
  3. It lacks the enzyme glucose-6-phosphatase
  4. It lacks the enzyme Phosphoglucomutase

Question Answer: It lacks the enzyme glucose-6-phosphatase


Under which conditions would lactic acid accumulate in skeletal muscle?

  1. When citric acid enzymes are depleted
  2. When O2 is depleted
  3. When ATP is depleted
  4. When NADH is depleted

Question Answer: When O2 is depleted


Which processes does not generate CO2?

  1. Citric acid Cycle
  2. Conversion of Pyruvate to Lactate
  3. Conversion of Pyruvate to Acetyl CoA
  4. Conversion of Pyruvate to ethanol

Question Answer: Conversion of Pyruvate to Lactate


18 A metabolically active cell is in a steady state only if:

  1. The rate of metabolic flow is unchanged
  2. Intermediates are formed and consumed at equal at equal rates
  3. There is no flux
  4. It is at equilibrium with its surroundings

Question Answer: Intermediates are formed and consumed at equal at equal rates


What is the net yield of NADH when 1 mole of glucose-6-phosphate is oxidized by aerobic glycolysis to yield pyruvate?

  1. 2 mole
  2. 1 mole
  3. 0 mole
  4. 4 mole

Question Answer: 2 mole


For every molecule of glucose, how many molecules of CO are released in the citric acid cycle?

  1. Four
  2. Two
  3. One
  4. Six

Question Answer: Four


Amino acids, fatty acids and glucose are oxidized and enter the citric acid cycle as:

  1. Pyruvate
  2. Acetate
  3. Acetyl-CoA
  4. Oxaloacetate

Question Answer: Acetyl-CoA


Sugar absorption from the intestine involves:

  1. Active transport
  2. Sodium lons
  3. Na-K ATPase
  4. Both A, B, and C

Question Answer: Both A, B, and C


What is the intracellular site for the operation of glycolysis?

  1. Cytosol
  2. Lysosomes
  3. Endoplasmic reticulum
  4. Mitochondria

Question Answer: Cytosol


What is another name for Glucokinase?

  1. Hexokinase IV
  2. Hexokinase II
  3. Hexokinase III
  4. Hexokinase I

Question Answer: Hexokinase IV


Fructokinase is present in which of the tissues?

  1. Heart
  2. Adipose tissue
  3. Liver
  4. Brain

Question Answer: Liver


Which is correct regarding the inter-conversion of nutrients?

  1. Lipids can be converted to amino acids.
  2. Amino acids can be converted to glucose and lipids.
  3. Lipids can be converted to glucose.
  4. Both A, B, and C

Question Answer: Amino acids can be converted to glucose and lipids


Which can be said to act as a carrier of Citric acid cycle?

  1. Acetyl CoA
  2. Ketoglutarate
  3. Oxaloacetate
  4. Malate

Question Answer: Oxaloacetate


Salivary amylase is activated by

  1. Na
  2. CI
  3. HCO
  4. K

Question Answer: CI


Which statement is correct regarding the conversion of Pyruvate to Acetyl-CoA and CO2?

  1. It reversible
  2. Requires Lipoic Acid
  3. Occurs in the cytosol
  4. Both A, B, and C

Question Answer: Requires Lipoic Acid


The pentose phosphate pathway serves as a source for each of the following except:

  1. Ribose-5-phosphate
  2. NADPH
  3. ATP
  4. 6-phosphogluconic acid

Question Answer: ATP


Glycogen in muscle serves as _____.

  1. a source of fuel for ATP synthesis within that tissue
  2. primarily as a buffer of blood glucose levels
  3. a source of blood glucose after phosphatase action on Glu-6-p
  4. is rapidly synthesized during fasting

Question Answer: Serves as a source of fuel for ATP synthesis within that tissue


Glycolysis of Glucose, under anaerobic conditions, yields how many ATPS?

  1. 6
  2. 2
  3. 8
  4. 10

Question Answer: 2


Glucose-6-phosphatase is absent from Which tissues

  1. Kidney
  2. Intestine
  3. Brain
  4. Heart

Question Answer: Brain


What is common between Glycolysis and Pentose phosphate pathways?

  1. Both generate NADPH
  2. Both involve the oxidation of glucose
  3. Both generate ATP
  4. Formation of glyceraldehydes-3. Phosphate

Question Answer: Both involve the oxidation of glucose

More Biochemistry MCQs

  1. Acid and Base MCQs
  2. Carbohydrate MCQs
  3. Proteins MCQs
  4. Lipids and Biomembranes MCQs
  5. Nucleic acids MCQs
  6. Metabolism of Carbohydrates MCQs
  7. Enzymes MCQs
  8. Vitamins and Hormones MCQs
  9. Bioenergetic MCQs
  10. Biotechnology MCQs
  11. Biotechnology MCQs 2
  12. Basic Biochemistry MCQs (important)
  13. CHEMISTRY MCQs From all subjects of  Chemistry
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