GATE XL 2019 Paper 1 — page 14

Questions 40–42 of 125. Imported answers require review unless explicitly marked reviewed.

Which one of the following is an incorrect biomolecule-modification pair?

Your answerChoose one option.

Lipid - Palmitoylation

DNA and Protein - Methylation

Protein - Glycosylation

RNA - Polyadenylation

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The crystal structure of a peptide has an ordered structural repeat of amino acids with a distance of ~ 6.5 Å between the alternate Cα atoms. Which one of the following pair of dihedral angles (Φ and Ψ) accurately represents the peptide structure?

Your answerChoose one option.

Φ ≈ −60°, Ψ ≈ −50°

Φ ≈ −120°, Ψ ≈ −50°

Φ ≈ −60°, Ψ ≈ +120°

Φ ≈ −120°, Ψ ≈ +120°

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Absence of detectable protein expression upon blunt-ended mutation-free cloning of an E.coli gene with its own promoter in E. coli cells can be due to

Your answerChoose one option.

Cloning occurred in reverse orientation

Cloning occurred out of frame

Codon bias

Rapid degradation of expressed protein

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2019 · Paper 1

Question 15

Question 16

Question 17