Which of the following conventions is used to denote the presence of carbonyl group in left/right in the chemical structure of a carbohydrate?(a) Positive/ negative(b) -1/ +1(c) L/ R(d) L/ DThe question was posed to me in homework.This key question is from Chemical Basis of Life in portion Chemical Basis of Life of Cell Biology

Which of the following conventions is used to denote the presence of c

1.	Which of the following conventions is used to denote the presence of carbonyl group in left/right in the chemical structure of a carbohydrate?(a) Positive/ negative(b) -1/ +1(c) L/ R(d) L/ DThe question was posed to me in homework.This key question is from Chemical Basis of Life in portion Chemical Basis of Life of Cell Biology
Answer» CORRECT CHOICE is (d) L/ D For explanation: When carbonyl group as in ketone or aldehyde is located on the left side the molecule is represented with a PREFIX ‘L-‘, for example L- glyceraldehyde; if present on the right prefix ‘D-‘ is added.

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