Two free ribonucleotide units are interlinked with

1. Peptide bond

2. Covalent bond

3. Hydrogen bond

4. Phosphodiester bond

Genes are packaged into a bacterial chromosome by                           [1997]

1. Histones

2. Basic proteins

3. Acidic proteins

4. Actin

Lactose is composed of                      [1998]

1. Glucose+Glucose

2. Glucose+Fructose

3. Fructose+Galactose

4. Glucose+Galactose

In which of the following groups, all the three are examples of polysaccharides?           

1. Starch, glycogen, cellulose

2. Sucrose, maltose, glucose

3. Glucose, fructose, lactose

4. Galactose, starch, sucrose 

Km value is dependent upon

1. Temperature

2. Substrate concentration

3. Enzyme concentration

4. All of the above

Most abundant organic compound on earth is                     [2001,2004]

1. Protein

2. Cellulose

3. Lipids

4. Steroids

Which one of the following is the correct matching of a vitamin, its nature and its deficiency disease? 

1. Vitamin-A    -    Fat soluble     -    Night blindness

2. Vitamin-K    -    Fat soluble     -    Beri-beri

3. Vitamin-A    -    Fat soluble     -    Beri-beri

4. Vitamin-K    -    Water soluble -    Pellagra

To which of the following family do folic acid and pantothenic acid belong? 

1. Vitamin-C

2. Vitamin-K 

3. Vitamin-A

4. Vitamin-B complex

Which one of the following amino acids is an essential part of human diet ?

1. Glycine

2. Phenylalanine

3. Serine

4. Aspartic acid

Calcium deficiency occurs in the absence of vitamin

1. D

2. C

3. E

4. B