Which of the following Fischer projections corresponds to the shown bond-line drawing (Hint: determine R/S configurations for the centers in the bond-line, and then compare to the chiral centers in the Fisher projections). HO. H- H- H- -NH₂ -CH3 -SH CH3 (A) НО. H₂N- H H- HS -H -CH3 -SH CH3 (B) NH₂ OH НО. H- H3C- O -NH₂ -H HSH CH3 (C) НО. H₂N- -H H- HS -CH3 -H CH3 (D)
Catalysis and Enzymatic Reactions
Catalysis is the kind of chemical reaction in which the rate (speed) of a reaction is enhanced by the catalyst which is not consumed during the process of reaction and afterward it is removed when the catalyst is not used to make up the impurity in the product. The enzymatic reaction is the reaction that is catalyzed via enzymes.
Lock And Key Model
The lock-and-key model is used to describe the catalytic enzyme activity, based on the interaction between enzyme and substrate. This model considers the lock as an enzyme and the key as a substrate to explain this model. The concept of how a unique distinct key only can have the access to open a particular lock resembles how the specific substrate can only fit into the particular active site of the enzyme. This is significant in understanding the intermolecular interaction between proteins and plays a vital role in drug interaction.
![**Fischer Projection Problem Set**
**Problem Statement:**
Which of the following Fischer projections corresponds to the shown bond-line drawing? (Hint: determine R/S configurations for the centers in the bond-line, and then compare to the chiral centers in the Fischer projections).
**Bond-line Drawing:**
- Structure: Contains a central carbon bonded to an SH group, NH2 group, a methyl group (CH3), and a carboxylic acid group (COOH).
**Fischer Projections:**
(A)
- C1: HO and C=O at the top
- C2: Bonded to NH2, H, CH3, and H
- C3: Bonded to H, SH, and CH3
(B)
- C1: HO and C=O at the top
- C2: Bonded to NH2, H, CH3, and H
- C3: Bonded to SH, H, and CH3
(C)
- C1: HO and C=O at the top
- C2: Bonded to NH2, H3C, H, and H
- C3: Bonded to H, SH, and CH3
(D)
- C1: HO and C=O at the top
- C2: Bonded to H2N, H, H, and CH3
- C3: Bonded to HS, H, and CH3
**Options:**
- O A
- O B
- O C
- ● D
**Explanation:**
To solve this problem, compare the central chiral atom configurations in the bond-line drawing with those in the Fischer projections. Determine the R/S configuration of each chiral center in the bond-line structure, then match these configurations to those in the Fischer projections to find the correct correspondence.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F28000c02-e2c6-4a8b-b2f9-904011bfd87b%2F1dccc443-e6bc-4aa9-b066-782c6d80891c%2Fcyvhruo_processed.png&w=3840&q=75)
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