medical MCQs – Page 384

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 Review each marked answer and report any item that may be outdated or unclear.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

7661. Deficiency of vitamin C causes the following except_______________?
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A. Defective collagen synthesis

B. Subcutaneous & other hemorrhage

C. Pigeon chest

D. Soft swollen gums

7662. Transport form of iron is______________?
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A. Transferrin

B. Lactoferrin

C. Apoferritin

D. Ferritin

7663. Nonsense codons bring about__________________?
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A. Initiation of protein synthesis

B. Elongation of polypeptide chain

C. Pre-translational modification of protein

D. Termination of protein synthesis

7664. Decarboxylation of which of the following amino acids results in formation of a vasodilator ?
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A. Arginine

B. Glutamic acid

C. Histidine

D. Valine

7665. Denaturation of double stranded DNA involves_______________?
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A. It gets broken down to nucleotides

B. It becomes double stranded irreversibly

C. It becomes single stranded irreversibly

D. It becomes single stranded reversibly

7666. The fuel value of fat is____________?
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A. 7

B. 4

C. 5

D. 9

7667. Amino acids excreted in the urine in cystinosis______________?
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A. Cystine

B. All of the above

C. Ornithine

D. Arginine

E. Lysine

7668. Proteins are linear polymers of amino acids, They fold into compact structures Sometimes these folded structures associate to form homo or hetero dimers Which one of the following refers to this associated form ?
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A. Denatured state

B. Quaternary structure

C. Precipitation

D. Molecular aggregation

7669. In human body which of the following trace element is next to iron_______________?
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A. Zn++

B. Cu++

C. Ca++

D. Selenium

7670. Unwinding of DNA is done by____________?
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A. Ligase

B. DNAse

C. Topo isomerase

D. Reverse transcriptase

7671. All are true about glutathione except ?
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A. It converts hemoglobin to methemoglobin

B. It is a tripetide

C. It scavenges free radicals and superoxide ions

D. It conjugates xenobiotics

7672. Normal serum calcium level is_______________?
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A. 19-21 mg/dl

B. 9-11 mg/dl

C. 20-30 mg/dl

D. 4-6 mg/dl

7673. Codons are present on_____________?
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A. DNA

B. m-RNA

C. t-RNA

D. Ribosomal RNA

7674. The amino acid, which is used is the estimation of collagen is_____________?
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A. Proline

B. Lysine

C. Glycine

D. Hydroxyproline

7675. 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

7676. 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

7677. 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

7678. Vitamin C is present in largest amount in the body in____________?
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A. Kidneys

B. Testes

C. Adrenal cortex

D. Eye

7679. 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

7680. The sugar component of cerebrosides is_____________?
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A. Galactose

B. Fructose

C. None of the above

D. Sucrose

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