Practice Questions

TLS Online TPP Program

#Question id: 4948

RNA molecules can both carry genetic information and be catalytic. This supports the proposal that

#Unit 9. Evolution & Diversity of Life Forms

RNA was the first hereditary information.
protobionts had an RNA membrane.
RNA could make energy.
free nucleotides would not have been necessary ingredients in the synthesis of new RNA molecules.

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#Question id: 1421

#Unit 4. Cell Communication and Cell Signaling

XIAP proteins:

#Question id: 1422

#Unit 4. Cell Communication and Cell Signaling

In cells that have been signaled to die via TNF-a receptor signaling but lack caspase-8 activity:

#Question id: 1423

#Unit 4. Cell Communication and Cell Signaling

Which of the following is a characteristic of malignant tumors?

#Question id: 1424

#Unit 4. Cell Communication and Cell Signaling

Gain-of-function mutations in which of the following genes typify colorectal carcinomas?

#Question id: 1425

#Unit 4. Cell Communication and Cell Signaling

During metastasis, cells may undergo an epithelial-to-mesenchymal transition whereby there is a(n):

#Question id: 1426

#Unit 4. Cell Communication and Cell Signaling

Which of the following promotes angiogenesis?