TLS Online TPP Program

#Question id: 12577


During  a  field  trip,  an  instructor  touched  a  moth  resting  on  a  tree  trunk.  The  moth  raised  its  forewings  to  reveal large eyespots on its hind wings. The instructor asked why the moth lifted its wings. One student answered that sensory  receptors  had  fired  and  triggered  a  neuronal  reflex  culminating  in  the  contraction  of  certain  muscles.  A second student responded that the behaviour might frighten predators. Which statement best describes these explanations?

#10. Ecological Principles
  1. The first explanation is correct, but the second is incorrect.
  2. The first explanation refers to proximate causation, whereas the second refers to ultimate causation. 
  3. The first explanation is biological, whereas the second is philosophical.
  4. The first explanation is testable as a scientific hypothesis, whereas the second is not
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TLS Online TPP Program

#Question id: 1397

#4. Cell Communication and Cell Signaling

The vertebrate equivalent of CED-9 is:

TLS Online TPP Program

#Question id: 1398

#4. Cell Communication and Cell Signaling

Which of the following properties is (are) characteristic of a benign tumor?

a. well differentiated              b. localized to tissue of origin             c. metastatic               

d. promotes angiogenesis        e. surrounded by a fibrous capsule

TLS Online TPP Program

#Question id: 1399

#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

TLS Online TPP Program

#Question id: 1401

#4. Cell Communication and Cell Signaling

Which of the following are proto-oncogenes?

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

TLS Online TPP Program

#Question id: 1402

#4. Cell Communication and Cell Signaling

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

TLS Online TPP Program

#Question id: 1403

#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