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TLS Online TPP Program

#Question id: 7236

Which of the following statement justified that the PMZ in chick is functionally equivalent to the amphibian Nieuwkoop center?

A. The posterior marginal zone produces Wnt8c and that, the PMZ cells secrete Vg1, a member of the TGF-β family.

B. PMZ cells capable of inducing the accumulation of β-catenin

C. PMZ cells secretes BMP, a member of the TGF-β family.

D. PMZ secretes its own Nodal antagonist—the Lefty protein.

Which of the following combination is correct?

#Unit 5. Developmental Biology
  1. A and B
  2. B and C
  3. C and D
  4. A and D
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TLS Online TPP Program

#Question id: 525

#Unit 1. Molecules and their Interaction Relevant to Biology

Under what situation might lactic acidosis occur?
TLS Online TPP Program

#Question id: 5659

#Unit 5. Developmental Biology

 Following are the statements related to mammalian chaemotaxis .
A. During chaemotaxis, the oocyte and its accompanying cumulus cells secrete molecules that attract only uncapacitated sperm toward the egg during the last stages of sperm migration.
B. These chaemotactic compound are hormone progesterone, which is made by the cumulus cells.
C. Progesterone has been shown to bind to a receptor that activates Ca2+ channels in the cell membrane of the sperm tail, leading to sperm hyperactivity and provides directional cue.
D. Cumulus cells also secrete a substance, CRISP1, that attracts sperm and hyperactivates them through CatSper channels similar as in sea urchins.
Which of  the following statement is incorrect?
TLS Online TPP Program

#Question id: 26803

#Unit 8. Inheritance Biology

In some sheep, the presence of beard is produced by an autosomal allele that is dominant in males and recessive in females. A beard female is crossed with a homozygous beardless male. One of the resulting F1 females is crossed with a beardless male. What proportion of the male and female progeny from this cross will have beard in F2 generation?
TLS Online TPP Program

#Question id: 10911

#Unit 6. System Physiology – Plant

Researchers have investigated bidirectional transport by applying two different radiotracers to two source leaves, one above the other. Researcher wanted to see how bidirectional transport happens in sieve elements. Which one of the following is INCORRECT interpretation for bidirectional transport?
TLS Online TPP Program

#Question id: 3413

#Unit 11. Evolution and Behavior

 Following certain conditions is present in a population?

A- Large Population

B- Each locus carries two allele 

C- Sexual selection 

D- Frequency dependent selection  

E- No linkage between genes

Which of the following above condition allowed to validity of Hardy- Weinberg Prediction?