medical MCQs – Page 372

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 Review each marked answer and report any item that may be outdated or unclear.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

7421. All these reactions take place inside the mitochondria except____________?
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A. EMP pathway

B. Urea cycle

C. Krebs cylce

D. Electron transfer

7422. Iron is present in all of the following except_______________?
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A. Catalase

B. Myoglobin

C. Pyruvate kinase

D. Cytochrome

7423. An example of layses is_____________?
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A. Amylase

B. Glutamine synthetase

C. Fumarase

D. Cholinesterase

7424. The tissue with the highest glycogen content (mg/100gm)_____________?
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A. Muscle

B. Kidneys

C. Liver

D. Testes

7425. Which acid is formed in the citric acid cycle ?
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A. Oxaloacetic acid

B. None of the above

C. Glutamic acid

D. Nitric acid

7426. Which one of the following enzymes provides a link between glycolysis and the citric acid cycle ?
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A. Pyruvate dehydrogenase

B. Lactate dehydrogenase

C. Citrate synthase

D. Pyruvate kinase

7427. Renal threshold for glucose is______________?
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A. 200 mg%

B. 180 mg/ dl

C. 100 mg%

D. 80 mg%

7428. Insulin acts on which enzyme in glycolysis ?
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A. Glucose 6 phosphatase

B. Adenylate kinase

C. Glucokinase

D. Hexokinase

7429. Most lipogenic____________?
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A. Glucose

B. Galactose

C. Ribose

D. Fructose

7430. When the prosthetic group of an enzyme is an inorganic ion, it is called a_____________?
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A. Apoenzyme

B. Coenzyme

C. Cofactor

D. Holoenzyme

7431. Number of ATP molecules generated in the conversion of glycogen of lactate is_____________?
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A. 2

B. 38

C. 36

D. 32

7432. Fraction of CPK is an enzyme that is elevated in a myocardial infarct is____________________?
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A. MM fraction

B. MB fraction

C. BB fraction

D. Both MM and BB fraction

7433. During phagocytosis the metabolic process called respiratory burst involves activation of_____________?
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A. Hydrolase

B. Dehydrogenase

C. Peroxidase

D. Oxidase

7434. Dietary fibre is rich in_____________?
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A. Starch

B. Collagen

C. Inulin

D. Cellulose

7435. Enzymes concerned with the citric acid cycle are found in the____________?
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A. Mitochondria

B. Ribosomes

C. Nonparticulate cytoplasm

D. Nucleus

7436. In TCA cycle substrate level phosphorylation occurs at____________?
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A. None of the above

B. Thiokinase

C. Succinate dehydrogenase

D. Malonate reduction

7437. The key enzyme of gluconeogenesis is______________?
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A. Phosphoenol pyruvate carboxykinase

B. Glucose 6 phosphatase

C. Pyruvate carboxylase

D. Fructose 1,6 disphosphatase

7438. Which one of the following is a monosaccharide______________?
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A. Strach

B. Sucrose

C. Maltose

D. Fructose

7439. In prolonged starvation the main nergy source of brain is_____________?
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A. Fatty acids

B. Ketone bodies

C. Fructose

D. Glucose

7440. Which of the following is correct of the pyruvate dehydrogenase enzyme complex ?
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A. It is present in cytoplasm

B. Catalyzes the conversion of pyruvate to oxaloacetate

C. Catalyzes a reversible reaction

D. Requires TPP as cofactor

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