#Question id: 4290
#Unit 3. Fundamental Processes
23S rRNA catalyze peptide-bond formation explained by the model of proton shuttle given in figure.
Which of the following statements is/are CORRECT for this model?
A. Base pairing between the 23S rRNA and the CCA ends of the tRNAs in the A- and P-sites positions is crucial for this reaction
B. This catalytic mechanism involves entropy
C. 2’-OH of the P-site tRNA act as part of a “proton shuttle”
D. it is a protein that catalyses peptide bond formation
#Question id: 28249
#Unit 5. Developmental Biology
Acrosome is derived at the time of maturation from which organelles?
#Question id: 5685
#Unit 5. Developmental Biology
Human sperm are allowed to fertilize ova having non- functional ovastacin. The following possibilities may be of significance in the fusion of these gametes:
A. The sperms will not fertilize ova.
B. The sperms will bind and penetrate the zona pellucida but will not be able to fuse with ovum membrane.
C. ZP2 will not be clipped by cortical granule protease.
D. CD9 protein of egg membrane microvilli will not be able to interact sperm membrane proteins in the absence of ovastacin.
E. Polyspermy may occur frequently.
Which combination of statements represent the outcome of the above event?
#Question id: 34136
#Unit 7. System Physiology – Animal
#Question id: 19112
#Unit 8. Inheritance Biology