Practice Questions

TLS Online TPP Program

#Question id: 1099

How does the toxin of Vibrio cholerae cause profuse diarrhea?

#Unit 4. Cell Communication and Cell Signaling

It modifies a G protein involved in regulating salt and water secretion.
It modifies adenylyl cyclase and triggers excess formation of cAMP.
It signals IP3 to act as a second messenger for the release of calcium.
It modifies a ligand-gated ion channel.

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TLS Online TPP Program

#Question id: 23527

#General Aptitude

Humans interfere with the natural phosphorus cycle by

TLS Online TPP Program

#Question id: 7761

#Unit 5. Developmental Biology

Correct sets of genes are well known to be involved in aging and its prevention, and each set appears to be conserved between phyla and even kingdoms.

a. DNA repair enzymes

b. proteins of the insulin signaling pathway

c. proteins in the mTORC1 signaling pathway

d. chromatin remodeling enzymes

TLS Online TPP Program

#Question id: 16325

#Unit 7. System Physiology – Animal

Symptoms of Moderate Anxiety:

TLS Online TPP Program

#Question id: 4588

#Unit 11. Evolution and Behavior

Which statement illustrates the connection between natural selection and overreproduction of a population?

TLS Online TPP Program

#Question id: 10886

#Unit 10. Ecological Principles

Much greater proportion of energy fixed by autotrophs is transferred to the herbivore level in the open ocean ecosystem than in a forest ecosystem because