biochemistry MCQs – Page 17

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

biochemistry Mcqs

321. The amino acid, which is used is the estimation of collagen is_____________?
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A. Proline

B. Lysine

C. Glycine

D. Hydroxyproline

322. In molecular cloning, Blue White screening is used for_______________?
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A. To identify desired chromosomal DNA insert in plasmid vectors

B. To screen for recombinant vectors

C. To detect host DNA in situ

D. To detect gene mutations

323. Inside the cell, the substance, which contributes to most of the osmolality, is________________?
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A. Protein

B. Phosphate

C. Potassium

D. Urea

324. The action of vitamin K in formation of clotting factor is through__________________?
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A. Golgi complex

B. Endoplasmic reticulum

C. Post translation

D. Post transcription

325. Vitamin C is present in largest amount in the body in____________?
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A. Kidneys

B. Testes

C. Adrenal cortex

D. Eye

326. Mutations are due to changes in_________________?
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A. Amino acid sequence of ribonuclease

B. RNA nucleotide sequence

C. Cell walls

D. DNA nucleotide sequence

327. The sugar component of cerebrosides is_____________?
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A. Galactose

B. Fructose

C. None of the above

D. Sucrose

328. The normal value of serum potassium level is____________?
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A. 3.8-5 meq/L

B. 6-7.2 meq/L

C. 2.8-3.8 meq/L

D. 5-5.8 meq/L

329. The main pathway for De Novo synthesis of fatty acids occurs in_______________?
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A. Nucleus

B. Mitochondria

C. None of the above

D. Cytosol

330. All are components of basement membrane except________________?
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A. Laminin

B. nidogen

C. Eutactin

D. Rhodopsin

331. Who is known for his work on scurvy ?
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A. Fracastorius

B. Edward Jenner

C. James lind

D. John snow

332. NADPH is required for________________?
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A. Fatty acid synthesis

B. Glycolysis

C. Gluconeogenesis

D. Glycogenolysis

333. True about G protein couple receptors is _________________ ?
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A. G proteins bind to hormones on the cell surface

B. G Proteins act as inhibitory and excitatory because of difference in alpha subunit

C. All the three subunits alpha, beta and gamma should bind each other for G protein to act

D. G protein is bound to GTP in resting state

334. HMG-CoA is formed during metabolism of all except______________?
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A. Ketone bodies

B. Leucine

C. Bile acids

D. Cholesterol

335. Quaternary structure of protein is_____________?
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A. The inter relation and arrangement of polypeptides in a protein with more than 2 polypeptide chains

B. Inter relation of amino acids in 2 polypeptide chains

C. Inter relation between amino acids in a single polypeptide chain

D. The arrangement sequence of amino acids in the polypeptide chain

336. Which of the following process in involved in conversion of DNA to RNA___________?
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A. Translocation

B. Conjugation

C. Transcription

D. Transduction

337. A mutation that converts an amino acid codon to a stop codon is a_____________?
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A. Silent mutation

B. Transversion

C. Nonsense mutation

D. Frame shift mutation

338. Ketone bodies are normally synthesized from______________?
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A. Glucose

B. Acetyl-CoA

C. Acetone

D. Glycerol

339. All of the following are true about manifestations of vitamin E deficiency except_____________?
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A. Posterior column abnormalities

B. Cerebellar ataxia

C. Hemolytic anemia

D. Autonomic dysfunctions

340. Hydroxylation of proline require the following except____________?
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A. O2

B. Fe+2

C. Ascorbic acid

D. Succinate

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