#Question id: 298
#Unit 1. Molecules and their Interaction Relevant to Biology
Water molecules contain _____________ hydrogen bond/s.
#Question id: 7761
#Unit 5. Developmental Biology
#Question id: 5681
#Unit 5. Developmental Biology
What is the arrangement of microtubules in sperm flagellum?
#Question id: 5663
#Unit 5. Developmental Biology
Following statements are related to slow block to polyspermy in mammals.
A. A First slow block to polyspermy comes When the cortical granules fuse with the egg cell membrane, they release protein-digesting enzymes which is called as ovastacin that modify the zona pellucida proteins.
B. A second slow block to polyspermy comes from the so-called zinc spark, the release of billions of zinc ions that is induced by the entry of the first sperm, these released zinc ions are seen to bind to the egg cell membrane form a “zinc shield” that prevents further sperm entry.
C. A third slow block to polyspermy occurs at the level of the egg cell membrane and involves Juno.
Which of the following is incorrect?
#Question id: 418
#Unit 1. Molecules and their Interaction Relevant to Biology
Biological oxidation-reduction reactions always involve: