Answer:
Natural disasters and human activity.
Explanation:
Hi there! I hope I'm not late. The answer is D and E. I just got it right. Hope this helps ;)
Explanation:
Homologous chromosomes are 2 physically different chromosomes that have the same genes but are not genetically identical. Sister chromatids are 2 copies of a single chromosome and so are genetically identical (they also are physically attached to one another).
- During the chymotrypsin reaction, both the protonated and unprotonated forms of histidine 57 occur.
- This is possible within the physiological pH range thanks to its pKa of 6.0.
<h3>Describe the role that histidine 57 plays in the chymotrypsin mechanism.</h3>
- General base catalysis and general acid catalysis are two of the processes that histidine accomplishes.
- As a general base, it takes a hydrogen from serine 195 in the first step.
- The amide group of the peptide bond that is breaking is given hydrogen in the next phase, which is an acid catalysis step.
- The second stage of the reaction is conducted according to a similar plan.
<h3>Role of nucleophilic catalysis in the chymotrypsin reaction mechanism:</h3>
- The nucleophile that attacks the substrate peptide bond in the first phase of the reaction is serine hydroxyl.
- Water is the nucleophile that attacks the intermediate acyl-enzyme in the second step.
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Answer:
1234 i didn't know the ans
