Monosaccharide Epimer P. D-mannose 1. C-3 epimer of D-glucose Q. D-allose 2. C-4 epimer of D-glucose R. D-galactose 3. C-4 epimer of D-mannose S. D-talose 4. C-2 epimer of D-glucose 5. C-5 epimer of D-glucose
To solve the problem of matching monosaccharides with their respective epimers, we need to understand what an epimer is. An epimer is a pair of stereoisomers that differ specifically at one carbon atom. Here is a step-by-step explanation of how to determine the correct match:
- Understand the relationships given in the answer choices:
- C-2 Epimer of D-glucose: At this position, D-mannose differs from D-glucose.
- C-3 Epimer of D-glucose: This is D-allose.
- C-4 Epimer of D-glucose: Here, we find D-galactose.
- C-4 Epimer of D-mannose: This results in D-talose.
- Now let's match each monosaccharide with its epimer:
- P. D-mannose: It is a C-2 epimer of D-glucose, which corresponds to option 4. Thus, P matches with 4.
- Q. D-allose: It is the C-3 epimer of D-glucose. This means Q matches with 1.
- R. D-galactose: As the C-4 epimer of D-glucose, R matches with 2.
- S. D-talose: D-talose is the C-4 epimer of D-mannose, resulting in a match with 3.
Given the above logic, the correct match is P-4; Q-1; R-2; S-3.
Important Questions from Structure and Function of Biomolecules
- Match the carbohydrates in Column I with the correct glycosidic linkages involved in Column II.
Column I Column II P. Amylose 1. $\beta$ ($1\to 4$) Q. Sucrose 2. $\alpha$ ($1\to 4$) R. Amylopectin 3. $\alpha 1\to \beta 2$ S. Cellulose 4. $\alpha$ ($1\to 4$), $\alpha$ ($1\to 6$) - Match the biomolecules in Column I with their function given in Column II
Column I Column II P. Lectins 1. Acts as ATP dependent pump to efflux out small molecules Q. P-glycoprotein 2. Targets lysosomal enzymes to their destination R. Digitoxigenin 3. Specific carbohydrate binding proteins S. Mannose 6-phosphate 4. Inhibits Na$^+$-K$^+$ pump - Which one of the following coenzymes is utilised by alanine racemase for the conversion of L-Alanine to D-Alanine?
- Which of the following show(s) optical activity at 100 mM concentration in water?
An octapeptide composed of these L-amino acids – Lys, Thr, Ser, Met, Arg, Trp, Tyr, Glu was subjected to analyses with the following outcomes:
P. The N-terminal sequencing analysis by Sanger's method yielded 'Ser' at the N-terminus
Q. Chymotrypsin treatment gave a pentapeptide, a ‘Tyr' containing dipeptide and a free ‘Glu'
R. Cyanogen bromide treatment gave two tetrapeptides
S. Trypsin treatment gave two tripeptides and a dipeptide
Which one of the following is the correct octapeptide sequence?
