NEETChemistryBiomolecules
Pick out the incorrect statement(s) from the following. 1. Glucose exists in two different crystalline forms, -D-glucose and -D-glucose. 2. -D-glucose and -D-glucose are anomers. 3. -D-glucose and -D-glucose are enantiomers. 4. Cellulose is a straight chain polysaccharide made of only -D-glucose units. 5. Starch is a mixture of amylase and amylopectin, both contain unbranched chain of -D-glucose units.
Options
- A1 and 2 only
- B2 and 3 only
- C3 and 4 only
- D3 and 5 only
Correct answer
D. 3 and 5 only
Step-by-step solution
-D-glucose and -glucose, differ in the orientation of - H and - OH groups are first carbon atom. Such isomers are called anomers. Starch is a mixture of amylase and amylopectin but amylase is a straight chain polymer while amylopectin is a branched chain polymer of -D-glucose.