The incorrect statement among the following is:

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 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

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

D-(+)-glucose reacts with hydroxylamine and yields an oxime. The structure of the

oxime would be:-

1.

2.

3.

4.

Which of the following hormones is produced under the condition of stress which

stimulates glycogenolysis in the liver of human beings?

1. Thyroxin               

2. Insulin

3. Adrenaline             

4. Estradiol

Which one of the following sets of monosaccharides forms sucrose?

1. a-D-galactopyranose and a-D-glucopyranose

2. α-D-glucopyranose and   b-D-fructofuranose

3. b-D -glucopyranose and a-D fructofuranose

4. α-D-glucopyranose and  b-D-fructopyranose

Which one of the following statements is not true regarding (+) lactose?

1. (+) lactose is a β-glycoside formed by the union of a molecule of D(+) glucose and a

molecule of D(+) galactose

2. (+) lactose is a reducing sugar and does not exhibit mutarotation

3. (+) lactose, C₁₂H₂₂O₁₁ contains 8-OH groups

4. On hydrolysis (+) lactose gives equal amount of D(+) glucose and D(+) galactose