Which one of the following compounds shows the presence of an intramolecular hydrogen bond?
1. H2O2
2. HCN
3. Cellulose
4. Concentrated acetic acid
In humans, the main oxygen carrier in the blood is:
1. Hemocyanin
2. Proteins
3. Haemoglobin
4. Both microorganisms and haemoglobin.
The difference between amylose and amylopectin is:
| 1. | Amylopectin has 1→4 α - linkage and 1→6 α-linkage. |
| 2. | Amylose has 1→4 α-linkage and 1 → 6 β-linkage. |
| 3. | Amylopectin has 1 → 4 α-linkage and 1 → 6 β-linkage. |
| 4. | Amylose is made up of glucose and galactose. |
The correct corresponding order of names of four aldoses with configuration given below respectively, is:
1. L-erythrose, L-threose, L-erythrose, D-threose
2. D-threose, D-erythrose, L-threose, L-erythrose
3. L-erythrose, L-threose, D-erythrose, D-threose
4. D-erythrose, D-threose, L-erythrose, L-threose
| 1. | β -glycosidic bond | 2. | Peptide bond |
| 3. | Dative bond | 4. | α -glycosidic bond |
D(+) glucose yields an oxime with hydroxyl amine. The structure of the oxime would be:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Which one of the following does not exhibit the phenomenon of mutarotation?
1. (+) Sucrose
2. (+) Lactose
3. (+) Maltose=
4. (-) Fructose
In DNA, the complementary bases are:
1. Adenine and thymine; guanine and cytosine
2. Adenine and thymine; guanine and uracil
3. Adenine and guanine, thymine and cytosine
4. Uracil and adenine; cytosine and guanine
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