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TLS Online TPP Program

#Question id: 2149

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

#Unit 2. Cellular Organization

  1.  a charged lipid in the membrane bilayer that allows ions to pass through.

  2. a membrane protein that permits a ligand to pass through the membrane only when opened by the appropriate ion.

  3. a membrane protein that permits an ion to pass through the membrane only when opened by the appropriate ligand.

  4. a molecule that binds to the membrane thereby allowing ions to pass through.

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TLS Online TPP Program

#Question id: 33488

#Unit 2. Cellular Organization

Overlapping gene occurs when the
TLS Online TPP Program

#Question id: 28837

#Unit 2. Cellular Organization

Rapid interconversion between a growing and shrinking state, if the change from growth to shrinkage is called____
TLS Online TPP Program

#Question id: 2715

#Unit 2. Cellular Organization

The interaction between the positively charged amino terminus of histone __________ and a negatively charged region of the histone fold domain of histone __________ is particularly important for 30 nm fibre formation.
TLS Online TPP Program

#Question id: 10511

#Unit 6. System Physiology – Plant

Which type of pumps inhibits digitoxin in the membranes of heart cells, leading to increased myocardial contraction?
TLS Online TPP Program

#Question id: 1529

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements are true regarding to gain-of-function and loss-of-function mutations with respect to cancer.