Mcq Subject: Biochemistry
Which of the following leads to an increase in enzyme activity –
A. Increase in temperature
B. Decrease in activation energy
C. Extremes of pH value
D. Low substrate concentration
View DescriptionCell membrane consists of:
A. Lipids and proteins
B. Lipids only
C. Protein only
D. None of the above
View DescriptionGlycogen synthesis and breakdown takes place in the same cell, having enzymes necessary for both the pathways. Why the glucose-6-phosphate, freshly synthesized during glycogenesis in cytoplasm of hepatocytes, is not immediately degraded by the enzyme glucose!6-phosphatase?
A. The thermodynamics does not or such a reaction to occur
B. Glucose-6-phosphatase is present in the endoplasmic reticulum and cannot act on glycogen formed in the cytoplasm
C. Glycogenesis and glycogenolysis are tightly regulated such that enzymes of only one of those is present at a time.
D. Steric hindrance due to albumin
View DescriptionWhich of these amino acids does not enter the Krebs cycle by forming Acetyl-CoA pyruvate?
A. Glycine
B. Tyrosine
C. Hydroxyprolinc
D. Alanine
View DescriptionWhich of the following is ω9 family?
A. Oleic Acid
B. Linoleic acid
C. Linolenic acid
D. Arachidonic acid
View DescriptionBest biochemical description of glucose is?
A. Exists as ketose sugar
B. Present in L form in all biosystems
C. Its C-4 epimer is galactose
D. It's a disaccharide
View DescriptionEnzymes help by:
A. Lowering the activation energy
B. Increasing the substrate concentration
C. Decreasing the surface tension
D. Increasing the activation energy
View Descriptionβ-oxidation of odd-chain fatty acids produce:
A. Succinyl CoA
B. Propionyl CoA
C. Acetyl CoA
D. Malonyl CoA
View DescriptionA person after consuming raw eggs presents with weakness, fatigue & hypoglycemia. Doctor gave him vitamin tablets. Which enzyme deficiency is causing hypoglycemia in this patient:
A. Phosphoenol pyruvate carboxykinase
B. Pyruvate carboxylase
C. Glycogen phosphorylase
D. Glucose 6 phosphatase
View DescriptionHyponatremia is defined as a serum Na+ level
A. < 135 mmol/L
B. > 135 mmol/L
C. < 160 mmo/L
D. < 100 mmo/L
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