TLS Online TPP Program

#Question id: 11787


Giving prostaglandin E2 (PGE2) to a pregnant woman may result in an abortion. What is the best explanation for this finding?

#Biochemistry
  1. PGE2 strongly stimulates uterine contraction
  2. PGE2 causes constriction of the arteries leading to the placenta
  3. PGE2 stimulates the release of oxytocin from the posterior pituitary
  4. PGE2 increases the secretion of progesterone from the corpus luteum
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TLS Online TPP Program

#Question id: 1398

#Life Sciences

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

#Biochemistry

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: 1399

#Life Sciences

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: 1400

#Biochemistry

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

TLS Online TPP Program

#Question id: 1400

#Life Sciences

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

TLS Online TPP Program

#Question id: 1401

#Biochemistry

Which of the following are proto-oncogenes?

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