GATE XL branch:xl PYQs & Answers — Page 113

Questions 1121–1130 of 1235. Imported answers require independent review unless marked reviewed.

Topic practice 1235 questionsPage 113 of 124

The EMF for the following cell at 298.15 K is Ag(s) | Ag⁺(aq, 0.01 M) || Ag⁺(aq, 1.0 M) | Ag(s) (Standard reduction potential for Ag⁺ + e⁻ → Ag is -0.80 V)

Your answerChoose one option.

0.12 V

0.68 V

0.80 V

0.92 V

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One gram of a protein is dissolved in one liter of water. The resulting solution exerts an osmotic pressure of 1.4 Torr at 298 K. Assuming that the protein does not ionize in solution, the molecular weight of the protein is __________ g mol⁻¹. (R = 0.082 L atm mol⁻¹ K⁻¹)

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The type of nucleophilic substitution and the possible products for each of the reactions P and Q are

Diagram for Life Sciences question 13 (figure 2)

Your answerChoose one option.

Diagram for Life Sciences question 13 (figure 3)

Diagram for Life Sciences question 13 (figure 4)

Diagram for Life Sciences question 13 (figure 5)

Diagram for Life Sciences question 13 (figure 6)

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If mono-chlorination occurs at every carbon in the following reaction, the number of isomers (stereo isomers + constitutional isomers) that one can have is

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The major product in the following reaction is

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Diagram for Life Sciences question 15 (figure 2)

Diagram for Life Sciences question 15 (figure 3)

Diagram for Life Sciences question 15 (figure 4)

Diagram for Life Sciences question 15 (figure 5)

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The molecular weight of a protein as determined by native PAGE is 400 kDa. This protein when run on a non-reducing SDS-PAGE gave a band of 200 kDa, and on a reducing SDS-PAGE, gave a band of 100 kDa. The protein has

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four subunits of which two sets are linked by two disulfide bridges

four subunits which are linked by four disulfide bridges

two subunits only and none are linked by disulfide bridges

two subunits which are linked by disulfide bridges

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Which one of the following techniques CANNOT be used to determine the sequence of a novel protein?

Your answerChoose one option.

De novo sequencing by ESI-MS/MS

Edman degradation

Sanger sequencing

Peptide mass fingerprinting

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Which type of polyacrylamide gel can be used for analyzing the four different proteins listed below? Protein P: 60 kDa, pI 4 Protein Q: 45 kDa, pI 8 Protein R: 60 kDa, pI 6 Protein S: 45 kDa, pI 7.5

Your answerChoose one option.

20% gel, pH 4-7

20% gel, pH 3-10

12% gel, pH 3-10

12% gel, pH 4-7

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The number of fragments generated when the peptide ‘ANDCQGKFMILKPDTRYVSFMRA’ is subjected to complete digestion with trypsin are ......

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Puromycin is a structural analog of

Your answerChoose one option.

alanyl-tRNA

tyrosyl-tRNA

methionyl-tRNA

glycyl-tRNA

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GATE XL branch:xl PYQs

Question 11

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Question 15

Question 16

Question 17

Question 18

Question 19

Question 20