Sample Multiple Choice Questions Sample Questions for JGEEBILS Part 3

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(NOTE: Wrong answers will get you negative marks)

1. In a magnetic field of 1.17 Tesla, a proton absorbs energy at a frequency of 50 MHz. For the same field, an electron absorbs at a frequency of: (Bohr Magneton = 9.27 × 10 - 24 JT-1, Nuclear Magneton = 5.05 × 10 - 27 JT-1)

[a] 50 MHz [b] 92.5 MHz [c] 500 MHz [d] 25 GHz [e] 92.5 GHz [f] none of the above

2. Assuming no degeneracy in the genetic code, the number of amino acids that would have to exist if the code is four units long could be:

[a] 20 [b] 64 [c] 128 [d] 256

3.10 ml of 0.4M CuSO4 solution is electrolyzed with a current of 1.93 A for 5 min. Assuming that the volume of the solution does not change during electrolysis, the molar concentration of Cu2 + after electrolysis is:

[a] 0.05 M [b] 0.1 M [c] 0.2 M [d] 0.3 M

4. The pK of histidine is 6.0. A 60 mM solution of histidine is adjusted to a pH of 5.0. The concentration of protonated form (in mM) will be:

[a] 54.6 [b] 30.0 [c] 5.46

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