Practice Questions

TLS Online TPP Program

#Question id: 12587

The most plausible hypothesis to explain why species richness is higher in tropical than in temperate regions is that

#Unit 10. Ecological Principles

Tropical communities are younger.
Tropical regions generally have more available water and higher levels of solar radiation.
Higher temperatures cause more rapid speciation.
Biodiversity increases as evapotranspiration decreases.

More Questions

#Question id: 1399

#Unit 4. Cell Communication and Cell Signaling

Loss-of-function mutations in which of the following genes typifies colorectal carcinomas?

a. myc b. K-ras c. p53 d. APC

#Question id: 1400

#Unit 4. Cell Communication and Cell Signaling

Which property is shared by malignant tumor cells and transformed cells in culture?

a. reduced growth factor requirement b. attachment-dependent growth

c. loss of actin microfilaments d. altered morphology

#Question id: 1401

#Unit 4. Cell Communication and Cell Signaling

Which of the following are proto-oncogenes?

a. fos b. myc c. p53 d. ras e. Rb

#Question id: 1402

#Unit 4. Cell Communication and Cell Signaling

Which of the following oncoproteins possess(es) protein kinase activity?

#Question id: 1403

#Unit 4. Cell Communication and Cell Signaling

Tumor-suppressor genes encode proteins with which of the following functions?

a. growth-promoting b. growth-arresting c. pro-apoptotic

d. anti-apoptotic e. DNA repair

#Question id: 1404

#Unit 4. Cell Communication and Cell Signaling

Which of the following are transcription factors?