How many effective codons are there for the synthesis of twenty amino acids?

• 64

• 32

• 60

• 61

Radula is found in

• Pila sp.

• Chiton sp.

• Lamellidens sp.

• Pinctada sp.

Which phase comes in between the G₁ and G₂ phases of cell cycle?

• M - phase

• G₀ - phase

• S - phase

• Interphase

Chromosome is made up of

• DNA and pectin

• RNA and DNA

• DNA and histone

• only histone

Cell division cannot be stopped in which phase of the cell cycle?

• G₁- phase

• G₂- phase

• S- phase

• Prophase

Cell theory is not applicable for

• bacteria

• fungus

• algae

• virus

The difference between systolic and diastolic pressure in human is

• 120 mm Hg

• 80 mm Hg

• 40 mm Hg

• 200 mm Hg

Which one of the following viruses contains is a DNA and RNA?

• Cyanophage

• Herpes virus

• Leuko virus

• Polio virus

How many variable segments are present in the basic structure of antibody molecule?

• One

• Two

• Three

• Four

Transposons are

• house-keeping genes

• jumping genes

• transporting genes

• stationary genes