TLS Online TPP Program

#Question id: 12092


The phenomenon of genetic drift is most likely to occur in populations that

#Unit 10. Ecological Principles
  1. Are large and panmictic
  2. Are undergoing gene flow
  3. Are allopatric
  4. Are small and inbred
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TLS Online TPP Program

#Question id: 2580

#Unit 2. Cellular Organization

Following statements are regarding to mechanism of kinesin-1 movement.

A. Initially leading head tightly bound to the microtubule and not bound by any nucleotide, while the trailing head is weakly bound to the microtubule and has ADP bound.

B. Binding of ATP induces a conformational change causing the linker to swing forward and dock into the head. This motion swings the former trailing head to become the leading head.

C. Binding of ATP induces a conformational change causing the linker to swing forward and dock into the head. This motion swings the former leading head to become the trailing head.

D. When leading head releases ADP and coordinately the trailing head hydrolyzes ATP to ADP + Pi. Pi is released and the linker becomes undocked.

E. When trailing head releases ADP and coordinately the leading head hydrolyzes ATP to ADP + Pi. Pi is released and the linker becomes undocked.

Which of the following combination is correct?

TLS Online TPP Program

#Question id: 12219

#Unit 7. System Physiology – Animal

When the dietary intake of K+ increases, body K+ balance is maintained by an increase in K+ excretion primarily by which of the following?

TLS Online TPP Program

#Question id: 2195

#Unit 2. Cellular Organization

Which of the following statements about the mobility of membrane components is true?

TLS Online TPP Program

#Question id: 1671

#Unit 4. Cell Communication and Cell Signaling

A chromosome on which T-cell receptor α chain gene rearrangement has occurred lacks which of the following gene segments?

TLS Online TPP Program

#Question id: 31161

#Unit 7. System Physiology – Animal

During the action potential, membrane potential moves toward the equilibrium potential for Na+ but does not reach it because: