In a protein molecule, various amino acids are linked together by

(1) b-glycosidic bond

(2) peptide bond

(3) dative bond

(4) a-glycosidic bond

The correct statement regarding RNA and DNA, respectively is:

A  non-reducing sugar among the following is -

1. Lactose                       

2. Glucose

3. Sucrose                       

4. Maltose

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

The central dogma of molecular genetics states that the genetic information flows from
(1) amino acids $\to$ proteins $\to$ DNA

(2) DNA $\to$ carbohydrates $\to$ proteins

(3) DNA $\to$ RNA $\to$ proteins

(4) DNA $\to$ RNA $\to$ carbohydrates

The incorrect statement among the following is:

Which one of the following compounds show the presence of 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 : 

The central dogma of molecular genetics states that the genetic information flows from

1.  amino acid - proteins - DNA

2.  DNA - carbohydrates - proteins

3.  DNA - RNA - proteins

4.  DNA - RNA - Carbohydrates