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TLS Online TPP Program

#Question id: 2006

In Cases 1 and 2 in the table, the mothers would be able, if needed, to supply blood to the newborn even 7-9 months after birth; the same would not be true for Case 3. Why?

#Unit 4. Cell Communication and Cell Signaling

  1. The fetus in Case 3 would provoke an immune response in the mother that would carry over after the birth.

  2. The newborn in Case 3 would soon be able to make antibodies to the B antigen of the mother.

  3. Newborn children, until about age 2, do not make appreciable antibodies, except against Rh+ antigen. 

  4. Passive immunity would have worn off for the third newborn, but not for the other two.

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TLS Online TPP Program

#Question id: 28275

#Unit 5. Developmental Biology

 what will happened when sulfated polysaccharide binds to its receptor on the sperm____ 
a) activates CatSper calcium channel
b) activates sperm membrane calcium transport channel
c) activates sperm membrane sodium-hydrogen exchanger
d) activates sperm membrane phospholipase enzyme
TLS Online TPP Program

#Question id: 7098

#Unit 5. Developmental Biology

The role of maternal factors (such as Vg-1, Xwnt-1, and VegT) packaged into the vegetal region of the Xenopus oocyte is:
TLS Online TPP Program

#Question id: 1909

#Unit 4. Cell Communication and Cell Signaling

Concerning MHC class II antigen differences between two individuals, which of the following is NOT TRUE?
TLS Online TPP Program

#Question id: 7111

#Unit 5. Developmental Biology

Hox genes:
TLS Online TPP Program

#Question id: 2912

#Unit 2. Cellular Organization

HOTAIR is a lncRNA whose gene is found in the Hox C cluster in humans, but it acts by regulating expression of the Hox D genes on another chromosome (in trans) by recruiting to that locus Polycomb Repressive Complex 2. Which of the following statements is/are correct regarding this regulation?