#Question id: 26546
#Unit 3. Fundamental Processes
Most of the mammalian mRNA decayed primarily by
#Question id: 5671
#Unit 5. Developmental Biology
Match the following mechanism of polyspermy (Column I) with events (Column II).
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Column I |
Column II |
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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?
#Question id: 28870
#Unit 2. Cellular Organization
Which of the following modification has a key role in the beating of cilia and flagella ?
#Question id: 33311
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 2743
#Unit 2. Cellular Organization
How many types of histone molecules are found in nature?