Biochemistry - Medical MCQ

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10 Biochemistry

In CRISPR-Cas 9 system, which repair mechanism is used for genome editing?

ANon homologous end repair

BHomologous repair

CMismatch repair

DNucleotide excision repair

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11 Biochemistry

What is the codon for selenocysteine?

AUAG

BUGA

CUAA

DGUA

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12 Biochemistry

Essential fatty acid present in breast milk which is required for normal growth of child is:

ALenoleic acid

BPalmitic acid

CDocosahexanoic acid

DEPA

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13 Biochemistry

In a reaction substrate is available in a concentration that is l000times the Km value of the enzyme. After 9 minutes of reaction, l7o substrate is conveed to product (12 microgram/ml). If the concentration of the enzyme is changed to 1/3 and concentration of substrate is doubled. What is the time taken to conve the substrate into the same amount of product, i.e. I 2microgram/ml?

A9 minutes

B4.5 minutes

C27 minutes

D13.5 minutes

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14 Biochemistry

Which of the following doesn’t occur in 5′ to 3′ direction?

ADNA repair

BDNA replication

CRNA editing

DTranscription

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15 Biochemistry

Which of the following vitamin is synthesized in vivo, in the body by humans?

ANiacin

BPantothenic acid

CCyanocobalamin

DFolic acid

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16 Biochemistry

Which of the following statements about tRNA molecules is false?

AThe enzyme that attaches an amino acid to a tRNA is aminoacyl-tRNA synthetase

BAlthough composed of a single strand of RNA, each molecule contains several sho, double-helical regions

CThe amino acid attachment is always to 3' end of the molecule.

DThere is at least one tRNA for each of the 2 amino acids

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17 Biochemistry

A lady presented with fatigue and tingling sensation in both hands and legs. On examination, she is found to have a fissured red tongue, lesions at angle of mouth and peripheral neuropathy with a decreased RBC glutathione reductase activity. What is the likely deficient vitamin?

ARiboflavin

BVitamin B12

CThiamine

DVitamin B6

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18 Biochemistry

Deficiency of nicotinic acid results in:

ABeri-beri

BPellagra

CNight blindness

DPernicious anemia

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Biochemistry MCQ Questions — Page 2