Practice Questions

TLS Online TPP Program

#Question id: 2149

A ligand-gated ion channel (such as the nicotinic acetylcholine receptor) is:

#Unit 2. Cellular Organization

a charged lipid in the membrane bilayer that allows ions to pass through.
a membrane protein that permits a ligand to pass through the membrane only when opened by the appropriate ion.
a membrane protein that permits an ion to pass through the membrane only when opened by the appropriate ligand.
a molecule that binds to the membrane thereby allowing ions to pass through.

More Questions

#Question id: 12979

#Unit 10. Ecological Principles

#Question id: 12980

#Unit 10. Ecological Principles

The following questions refer to Figure which depicts the age structure of three populations.

Which population is in the process of decreasing?

#Question id: 12981

#Unit 10. Ecological Principles

The following questions refer to Figure which depicts the age structure of three populations.

Which population appears to be stable?

#Question id: 12982

#Unit 10. Ecological Principles

The following questions refer to Figure which depicts the age structure of three populations.

Assuming these age-structure diagrams describe human populations, in which population is unemployment likely to be a societal issue in the future?

#Question id: 12983

#Unit 10. Ecological Principles

The following questions refer to Figure which depicts the age structure of three populations.

Assuming these age-structure diagrams describe human populations, which population is likely to experience zero population growth (ZPG)?

#Question id: 12984

#Unit 10. Ecological Principles