Practice Questions

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#Question id: 150

How do the pKa values of an ionizable side chain compare when the amino acid is free versus when it is in a polypeptide chain?

#Unit 1. Molecules and their Interaction Relevant to Biology

The pKa of the side chain is independent of whether the amino acid is in a polypeptide chain or is free.
The pKa of the side chain is always lower for the free amino acid.
The pKa of the side chain may be lower or higher in a polypeptide chain due to weaker inductive effects and differences in their microenvironments.
The pKa of the side chain is usually higher in a polypeptide chain due to stabilization from nearby residues in the three-dimensional structure.

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TLS Online TPP Program

#Question id: 24569

#Unit 10. Ecological Principles

Geometric and the exponential growth both are describe by

a. similar mathematical models

b. slightly different mathematical models

c. similar J-shaped growth curve

d. similar S-shaped growth curve

TLS Online TPP Program

#Question id: 12184

#Unit 2. Cellular Organization

Following graph represent Control of S phase onset in S. cerevisiae by regulated proteolysis of the S phase inhibitor Sic1.

Which of the following is correct according to graph?

TLS Online TPP Program

#Question id: 22964

#Unit 7. System Physiology – Animal

The receptor for PTH is coupled, via a

TLS Online TPP Program

#Question id: 5150

#General Aptitude

If the number 481* 673 is completely divisible by 9, then the smallest whole number in place of * will be :

TLS Online TPP Program

#Question id: 19688

#Unit 13. Methods in Biology

Which kind of event is represented by the T wave on the ECG recording?