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TLS Online TPP Program

#Question id: 5671

Match the following mechanism of polyspermy (Column I) with events (Column II).

 Column I

 Column II

A. Fast block to polyspermy

i. chemicals from the fusing sperm cytoplasm alter the sodium ion (Na+) channels on the membrane

B. Slow block to polyspermy

ii. enzyme cortical granule serine

protease, cleaves the protein posts that connect the vitelline envelope

iii the concentration of free Ca2+ in the egg cytoplasm increases

iv. an electric change in the egg cell membrane

v. the concentration of free Na+ in the egg cytoplasm increases

Which of the following is correct?

#Unit 5. Developmental Biology

  1. A. iv, v B. i, ii, iii

  2. A. i, ii, v B. iii, iv

  3. A. i, iv, v B. ii, iii

  4. A. i, ii, iii B. iv, v

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TLS Online TPP Program

#Question id: 22125

#Unit 1. Structure and Function of Biomolecules

A man goes to the house of Sita, who is the neighbor of Geeta, who has a daughter named Meera. Ashu is Aman’s father and is married to Anjali, who is sister of Geeta. How is Meera related to Anjali?
TLS Online TPP Program

#Question id: 799

#Unit 1. Structure and Function of Biomolecules

The two cleavage reactions required to generate the miRNA from these primary transcripts are mediated by two distinct RNases. A characteristic of both these enzymes is that they recognize and cleave RNAs on the basis of the structure of their substrates rather than their specific sequence. Which of the following statement is INCORRECT regarding the cleavage reactions that produces a mature RNA?
TLS Online TPP Program

#Question id: 78

#Unit 1. Structure and Function of Biomolecules

Which is true about naturally occurring monosaccharides?
TLS Online TPP Program

#Question id: 79

#Unit 1. Structure and Function of Biomolecules

The structure of D-arabinose is shown below. How many stereoisomers are possible for this molecule?
TLS Online TPP Program

#Question id: 80

#Unit 1. Structure and Function of Biomolecules

 Examine the Fischer projection below. How is this carbohydrate classified
TLS Online TPP Program

#Question id: 81

#Unit 1. Structure and Function of Biomolecules

The Fischer projections of linear D-glucose and D-galactose are shown below. These two molecules are