Molecules and Interactions-Amino Acids Nucleotides and Vitamins [CSIR (Council of Scientific & Industrial Research) Life Sciences]: Questions 1 - 5 of 8

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Question 1

Appeared in Year: 2018

Question MCQ▾

Which one of the following pair of amino acid are glycogenic and ketogenic in nature? (June)

Choices

Choice (4)Response

a.

Isoleucine and phenylalanine

b.

Alanine and Lysine

c.

Lysine and Leucine

d.

Aspartate and Lysine

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Question 2

Appeared in Year: 2016

Question MCQ▾

The sequence of the peptide KGLITRTGLIKR can be unequivocally determined by (July)

Choices

Choice (4)Response

a.

Only Edman degradation.

b.

Amino acid analysis and MALDI MS/MS mass spectrometry.

c.

MALDI MS/MS mass spectrometry.

d.

MALDI mass spectrometry after treatment of the peptide with trypsin.

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Question 3

Appeared in Year: 2020

Question MCQ▾

Which one of the following amino acids is characteristic of and is conserved in response regulator of plant two-component system?

Choices

Choice (4)Response

a.

Glutamic Acid

b.

Histidine

c.

Tyrosine

d.

Aspartic Acid

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Question 4

Appeared in Year: 2020

Question MCQ▾

The following disulfide bond containing peptide was digested using trypsin. How many peptide fragments will be produced by the digestion?

Disulfide Bond Containing Peptide Was Digested

Choices

Choice (4)Response

a.

Four

b.

Six

c.

Three

d.

Five

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Question 5

Appeared in Year: 2022

Question MCQ▾

Purine and pyrimidine nucleotides serve as monomeric units of the nucleic acid polymers DNA and RNA. Mentioned below are some of the statements with respect to the de novo synthesis of nucleotides. Which one of the following statements is incorrect? (February Shift 2)

Choices

Choice (4)Response

a.

Biosynthesis of both purine and pyrimidine nucleotides begin with ribose-5-phosphate and purine or pyrimidine rings are built on it.

b.

The first purine nucleotide biosynthesized by de novo pathway is inosinic acid or inosine-monophosphate.

c.

The first pyrimidine nucleotide biosynthesized by de novo pathway is orotidylic acid or orotidine monophosphate.

d.

Thymidylate or TMP is synthesized as deoxy-TMP from deoxy-UMP by thymidylate synthetase.

Edit