Practice Questions

TLS Online TPP Program

#Question id: 548

Which one of the following statements is true of enzyme catalysts?

#Unit 1. Molecules and their Interaction Relevant to Biology

Their catalytic activity is independent of pH.
They are generally equally active on D and L isomers of a given substrate.
They can increase the equilibrium constant for a given reaction by a thousand fold or more.
They can increase the reaction rate for a given reaction by a thousand fold or more.

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TLS Online TPP Program

#Question id: 8855

#Unit 9. Diversity of Life Forms

A spongeʹs structural materials (spicules, spongin) are manufactured by the

TLS Online TPP Program

#Question id: 23117

#Unit 2. Cellular Organization

Choose the correct statement of the following

a. The nucleosome consists of approximately equal masses of DNA and histones (including H1).

b. The four core histones are present in equal amounts in the cell.

c. H1 is half as abundant as the other histones, which is consistent with the finding that only one molecule of H1 can associate with a nucleosome.

d. One turn around the nucleosome takes 80 bp of DNA

TLS Online TPP Program

#Question id: 31304

#Unit 5. Developmental Biology

Hensen’s node is functionally equivalent to the which of the following structure of amphibian?

TLS Online TPP Program

#Question id: 27482

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is holds true for the D-Ribose (Rib), D-Arabinose (Ara), D-Xylose (Xyl), D-Lyxose (Lyx)

TLS Online TPP Program

#Question id: 10953

#Unit 7. System Physiology – Animal

What condition leads to a deficiency in factor IX that can be corrected by an intravenous injection of vitamin K?