biochemistry MCQs – Page 7

Practise focused biochemistry questions with marked answers for exam preparation and subject revision.

biochemistry Mcqs

121. NADPH is generated by the action of____________?
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A. Glucose 1 phosphate dehydrogenase

B. Glucose 1,6 diphosphate dehydrogenase

C. Glucose 6 phosphate dehydrogenase

D. All of the above

122. Lactate dehydrogenase is____________?
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A. Zymogen

B. Isozyme

C. Coenzyme

D. Antienzyme

123. Ribosomes are usually associated with______________?
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A. Nucleolus

B. Mitochondria

C. Plasma membrane

D. Endoplasmic reticulum

124. Muscle glycogen cannot contribute directly to blood glucose level because___________?
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A. Absence of glucokinase

B. Muscle does not contain glycogen phosphorylase

C. Muscle lacks glucose 6 phosphatase

D. Muscle lacks phospho gluco isomerase

125. Normal blood PH is______________?
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A. 7.7 8.0

B. 7.0 7.12

C. 6.8 7.0

D. 7.38 7.4

126. HMP shunt is of great importance in cellular metabolism because its produces_____________?
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A. NADPH

B. Acetyl CoA

C. ATP

D. ADP

127. The precursor of testosterone is_____________?
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A. Methyl testosterone

B. Pregnenolone

C. Estrogen

D. Aldosterone

128. In glycolysis ATP is produced by the following enzyme______________?
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A. Hexokinase

B. Phosphoglycerate kinase

C. Phosphohexose isomerase

D. Enolase

129. Enzyme + coenzyme constitutes_____________?
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A. Protoenzyme

B. Apoenzyme

C. Holoenzyme

D. Proenzyme

130. Normal blood bilirubin level is______________?
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A. 0.5 1 mg%

B. 4 5.5 mg%

C. 1 3 mg%

D. 3 4 mg%

131. Acetyl Co-A acts as a substrate for all the enzymes except______________?
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A. Malonyl CoA synthetase

B. HMG-Co A synthase

C. Fatty acid synthetase

D. Malic enzyme

132. Which of the following is false about starvation ketoacidosis ?
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A. Smell of acetone in breath

B. Metabolic acidosis

C. Rotheras test is +ve

D. Benedicts test +ve

133. The combination of main supporting enzyme is called______________?
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A. Apoenzyme

B. Coenzyme

C. Constitutive enzyme

D. Holoenzyme

134. Which of the following about biological membrane is true ?
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A. Lipid moiety is amphipathic

B. Symmertrical bi leaflet structures

C. Rigid assembly of protein, lipid and carbohydrate

D. Lipid and protein moiety are held by covalent interactions

135. The first product of glycogenolysis is_____________?
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A. Glucose 6 phosphatase

B. Glucose 1,6 diphosphatase

C. Glucose 1- phosphatase

D. Fructose 1- phosphatase

136. In TCA cycle or tricarboxylic acid cycle, which is first formed________________?
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A. Citrate

B. Succinate

C. Fumarate

D. Isocitrate

137. The monsaccharide glucose is best described by which one of the following statements ?
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A. It is a ketose

B. It possessesan anomeric C-2 carbon atom

C. It usually exists in the furanose form

D. It formspart of the disaccharide sucrose

138. Insulin increase the following pathways in liver EXCEPT____________?
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A. Protein syntehsis

B. Fatty acid synthesis

C. Glucose synthesis

D. Glycogen synthesis

139. LDH has following number oflsoenzymes________________?
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A. 3

B. 11

C. 2

D. 5

140. In Cytochrome p450, P stands for____________?
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A. Substrate protiens

B. Pigment

C. Structural proteins

D. Polymer

Showing 121 to 140 of 448 mcqs