Inulin is a:
1. Disaccharide containing two galactose
2. Disaccharide containing fructose and galactose
3. Polymer of fructose
4. Polysaccharide used in microbial culture
Sugars are technically called carbohydrates, referring to the fact that their formulae are only multiples of C(H2O). Hexose therefore has six carbons, twelve hydrogen and six oxygen atoms. Glucose is a hexose. Choose from among the following another hexose.
1. | Fructose | 2. | Erythrose |
3. | Ribulose | 4. | Ribose |
A | B | C | D | |
1. | Reducing end | Non reducing end | α [1→4] linkage | α [1→6] linkage |
2. | Non reducing end | Reducing end | α [1→4] linkage | α [1→6] linkage |
3. | Reducing end | Non reducing end | α [1→6] linkage | α [1→4] linkage |
4. | Non reducing end | Reducing end | α [1→6] linkage | α [1→4] linkage |
Statement I: | Iodine test can detect the presence of starch but not of cellulose in a given sample. |
Statement II: | Starch forms helical secondary structure and can hold iodine molecules while cellulose does not contain complex helices and hence cannot hold iodine. |
1. | Both Statement I and Statement II are correct and Statement II correctly explains Statement I |
2. | Both Statement I and Statement II are correct but Statement II does not correctly explain Statement I |
3. | Statement I is correct but Statement II is incorrect |
4. | Statement I is incorrect but Statement II is correct |
Formation of glycosidic bond represents:
1. Dehydration | 2. Hydrolysis |
3. Dehydrogenation | 4. Isomerization |
Cellulose, the most important constituent of plant cell wall, is made of
1. | Unbranched chain of glucose molecules linked by α 1, 4 glycosidic bond |
2. | Branched chain of glucose molecules linked by β 1, 4 glycosidic bond in straight chain and β 1, 6 glycosidic bond at the site of branching |
3. | Unbranched chain of glucose molecules linked by β 1, 4 glycosidic bond |
4. | Branched chain of glucose molecules linked by α 1, 6 glycosidic bond at the site of branching |