Which of the following is common in nature?
A. D sugars and D amino acids
B. L sugars and L amino acids
C. D sugars and L amino acids
D. L sugars and D amino acids
Answer: Option C
Solution(By Examveda Team)
D sugars and L amino acids are common in nature.D- and L- is a way of describing the absolute configuration of molecules that pre-date the (R, S) CIP system. D- and L-is an old but still-convenient shorthand for saying that molecules are enantiomers.
These compounds are called R and S enantiomers (or isomers). However, when amino acids or sugars are chiral, scientists call them D and L isomers. D- means “right-handed” and L- means “left-handed.”
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Which of the following vitamins remains most resistant on heat treatment of milk
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B. Vitamin C
C. Vitamin K
D. Vitamin E
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