Practice Questions

TLS Online TPP Program

#Question id: 8897

Which of the following statements would be least acceptable to most zoologists?

#SCPH06 I Botany

The extant cephalochordates (lancelets) are contemporaries, not ancestors, of vertebrates.
The first fossils resembling cephalochordates appeared in the fossil record around 550 million years ago.
Recent work in molecular systematics supports the hypothesis that cephalochordates are the most recent common ancestor of all vertebrates.
The extant cephalochordates are the immediate ancestors of the fishes.

More Questions

TLS Online TPP Program

#Question id: 19919

#SCPH01 Biochemistry

Scatchard plots are based on repeated equilibrium dialyses with a constant concentration of antibody and varying concentration of ligand. Which plots correctly verify the Scatchard equation that determined by equilibrium dialysis?

TLS Online TPP Program

#Question id: 3897

#SCPH05 I Biotechnology

Gene silencing by RNA interference acts by of the target gene.

TLS Online TPP Program

#Question id: 14696

#SCPH06 I Botany

Urn A contains 6 red and 4 black balls and urn B contains 4 red and 6 black balls, one ball is drawn at random from urn A and placed in urn B. Then one ball drawn at random from urn B and placed in urn A. If one ball is now drawn from urn A, the probability that it is found to be red is

TLS Online TPP Program

#Question id: 656

#SCPH06 I Botany

The ________ is the single shape a protein adopts under physiological conditions.