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CSIR NET 2024 | Life Science: Molecules and their interactions relevant to Biology | 18 April

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Question 1

Which of the following statements about a protein is true?

Question 2

The Vmax of several enzyme from the pectoral muscles (chest muscles used for flying) of pigeon and pheasant are shown below. The indication of importance of various ATP producing pathways is the Vmax of certain enzymes of this pathway.

What can be concluded from data given below?

A) β-oxidation predominates in pigeon while in pheasant anaerobic glycolysis of glycogen predominates?

B) pigeon muscle would consume more 0₂?

C) pigeon is a long-distance flyer as lactate building in pheasant limits long distance flights

Question 3

An antibody binds to another protein with an equilibrium constant, K of 5 x 10⁹ M -1.When it binds to a second, related protein, it forms three fewer hydrogen bonds, reducing its binding affinity by 2.8 kcal/mole. What is the K for its binding to the second protein?( Free-energy change is related to the equilibrium constant by the equation ΔG₀ = -2.3 RT log K, where R is 1.98 x 10^-3kcal /(mole K ) and T is 310 K

Question 4

Dissimilatory sulfate reducing bacteria utilizes:

Question 5

Of the six curves labeled in the Lineweaver-Burk graph below, three represent the effects of 0 mM, 5 mM, and 15 mM of a competitive inhibitor on a hypothetical enzyme.

Which of the curves most likely represents the 5-mM concentration of the competitive inhibitor?

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CSIR NET & SET Life Sciences

Apr 18CSIR NET & SET