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: 

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

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

Cellulose is a straight-chain polysaccharide composed of only :

1. D-glucose units joined by $\mathrm{\alpha }$ - glycosidic linkage.

2. D-glucose units joined by $\mathrm{\beta }$ - glycosidic linkage.

3. D-galactose units joined by $\mathrm{\alpha }$ - glycosidic linkage.

4. D-galactose units joined by $\mathrm{\beta }$ - glycosidic linkage.