Vitamin- B₁₂ contains

1. Zn (II)

2. Ca (II)

3. Fe (II)

4. Co (II)

Enzymes take part in a reaction and

1. decrease the rate of a chemical reaction

2. increase the rate of a chemical reaction

3. Both 1 and 2

4. None of the above

Which one of the following vitamins is water-soluble?

1. Vitamin-B

2. Vitamin-E

3. Vitamin K

4. Vitamin A

Which one of the following is employed as a tranquiliser?

1. Equanil

2. Naproxen

3. Tetracycline

4. Chlorpheninamine

Commonly used antiseptic 'Dettol' is a mixture of

(1) o-chlorophenoxylenol + terpineol

(2) o-cresol + terpineol

(3) phenol + terpineol

(4) chloroxylenol + terpineol

In reference to biological role, Ca²⁺ ions are important in

(1) triggering the contraction of muscles

(2) generating the right electrode potential across cell membrane

(3) hydrolysis of ATP

(4) defence mechanism

Which of the following protein destroy the antigen when it enters in body cell?

1. Antibodies

2. Insulin

3. Chromoprotein

4. Phosphoprotein

The hormone that contains iodine is : 

1. Insulin

2. Testosterone

3. Adrenaline

4. Thyroxine

Which one of the following is employed as a tranquilizer drug?

1. Promethazine

2. Valium

3. Naproxen

4. Mifepristone

Select the incorrect statement among the following

1. Aspirin is both analgesic and antipyretics

2. Ampicillin is a natural antibiotic

3. Sulphadiazine is a synthetic antibacterial

4. Some disinfectants can be used as antiseptics in lower concentrations