Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 1073
TLS Online TPP Program

#Question id: 1098

Which of the following is the most plausible explanation for why an animal cell would be unable to reduce the Ca2+ concentration in its cytosol compared with the extracellular fluid?

#Unit 4. Cell Communication and Cell Signaling

  1. inactivation of calcium-gated ion channels in the cell membrane

  2. excessive transport of calcium from the cytosol into the endoplasmic reticulum

  3. insufficient ATP levels in the cytosol

  4. insufficient levels of protein kinase in the cell

More Questions
TLS Online TPP Program

#Question id: 10557

#Unit 6. System Physiology – Plant

The attraction of water to a solid phase such as a cell wall or glass surface known as
TLS Online TPP Program

#Question id: 28579

#Unit 5. Developmental Biology

Which of the following growth factor causes proliferation of the Sertoli cell precursors and stimulates their differentiation?
TLS Online TPP Program

#Question id: 4378

#Unit 3. Fundamental Processes

This serves as the promoter for 70% of eukaryotic genes and typically serves as a control region for genes that are transcribed at relatively low rates.
TLS Online TPP Program

#Question id: 27511

#Unit 2. Cellular Organization

Which of the following is true when a Intercalation of ethidium ion into the DNA takes place

a. It unwind the two base pair by 260

b. Reduces the normal rotation per base pair from 360 to 100

c. Increases the normal rotation per base pair from 100 to 360

d. It first removes the negative supercoils and then introduces positive supercoils
TLS Online TPP Program

#Question id: 12614

#Unit 10. Ecological Principles

A small population of white-footed mice has the same intrinsic rate of increase (r) as a large population. If everything else is equal,