GATE XL 2019 Paper 1 — page 13

Questions 37–39 of 125. Imported answers require review unless explicitly marked reviewed.

Paper practice 125 questionsPage 13 of 42

The ascending order of half-life for the radioactive isotopes, ¹²⁵I, ³H, ¹⁴C and ³²P, is

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¹⁴C < ¹²⁵I < ³H < ³²P

³²P < ³H < ¹²⁵I < ¹⁴C

¹⁴C < ³H < ³²P < ¹²⁵I

³²P < ¹²⁵I < ³H < ¹⁴C

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The enzyme NOT involved in oxidation of the molecule shown below is

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Δ³, Δ²-Enoyl-CoA isomerase

Propionyl-CoA carboxylase

Acyl CoA dehydrogenase

Enoyl CoA hydratase

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DpnI is used to digest the PCR product during site directed mutagenesis because

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DpnI digests irrespective of methylation status of DNA

DpnI digests only unmethylated DNA

DpnI digests only methylated DNA

DpnI digests GC-rich sequences

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2019 · Paper 1