medical MCQs – Page 371

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

medical Mcqs

1. oral anatomy 2. microbiology 3. oral pathology and medicine 4. physiology 5. biochemistry 6. general anatomy 7. dental materials 8. pharmacology 9. pathology 10. oral histology

7401. The rate of absorption of sugars by the small intestine is highest for_______________?
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A. Hexoses

B. Polysaccharides

C. Disaccharides

D. Pentoses

7402. The activity of the following enzyme is affected by biotin deficiency____________?
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A. Carboxylase

B. Transketolase

C. Dehydrogenase

D. Oxidase

7403. Which of the following is a function of the golgi apparatus ?
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A. Modification of proteins

B. m RNA synthesis

C. Protein storage

D. t RNA synthesis

7404. Galactosemia commonly is due to deficiency of_____________?
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A. Glucose 1 phosphatase

B. Galactose 1 phosphatase uridyl transferase

C. Glucose 6 phosphatase

D. Galactose 1 phosphatase

7405. Which of the following is correctly matched ?
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A. Malate to oxaloacetate -1 ATP is formed

B. Succinate to furmarate -1 ATP is formed

C. Isocitrate to oxalo succinate -1 ATP is formed

D. Succinyl CoA to succinate -1 ATP is formed

7406. Which of the following is not a product of HMP shunt_____________?
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A. NADPH

B. D sedoheptulose 5 phosphate

C. D glyceraldehyde 3 phosphate

D. D fructose 6 phosphate

7407. Most importent compansatory mechanism in metabolic acidosis______________?
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A. Increased urinary phosphates

B. Increased NH3 excretion by kidneys

C. Hyperventilation

D. Increased HCO3 Production

7408. Hexokinase is a______________?
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A. Reductase

B. Oxidase

C. Oxidoreductase

D. Transferase

7409. Which of these organelle functions as the digestive system of the cell ?
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A. Mitochondria

B. Lysomes

C. Rough endoplasmic reticulum

D. Golgi apparatus

7410. Bile acids are formed from__________?
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A. Lipoproteins

B. Bilirubin

C. Aminoacids

D. Cholesterol

7411. The most common enzyme deficiency in man is___________?
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A. Glucose 6 phosphate dehydrogenase

B. Hexokinase

C. Glucose 1,6 diphosphatase

D. Glucose 6 phosphatase

7412. Enzyme that catalyses the transfer of a molecule group from one molecule to another is_____________?
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A. LIpases

B. Oxidases

C. Transferases

D. Peptidases

7413. Step in HMP pathway requiring TPP_____________?
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A. G6 PD

B. 6 phosphogluconate dehydrogenase

C. Transaldolase

D. Transketolase

7414. Increase in pyruvate and lactate is seen in which of the following deficiency ?
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A. Vitamin C

B. Thiamine

C. Pyridoxine

D. Niacin

7415. Enzymes are classified according to_________________?
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A. Nature of the enzymes

B. Action on substrate

C. Action of coenzymes

D. All of the above

7416. Gluconeogenesis occurs in the liver and _______?
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A. Fat

B. Heart

C. Muscle

D. Kidney

7417. McArdles disease is due to the deficiency of_____________?
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A. Myophosphorylase

B. Glucose 6 phosphatase

C. Glucose 1 phosphatase

D. Glucose 1,6 phosphatase

7418. Krebs cycle occurs in _________ conditions?
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A. Anaerobic

B. Microaerophilic

C. Aerobic

D. Aerobic and anaerobic

7419. In mycocarrdial infarction the first enzyme to rise____________?
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A. SGOT

B. CPK

C. Amylase

D. LDH

7420. To keep blood PH at 7.4 the HCO3 : H2CO3 ratio should be_____________?
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A. 15:01

B. 30:01:00

C. 1:01

D. 20 : 1

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