Biology Questions

The size of the pupil is controlled by the Iris when light enters the eye.

Five basic tastes are :

salty,

sweet,

bitter,

sour, and

umami.

The taste receptors are located all over in the mouth around paillae structures.

Most of the Vitamin K is synthesized by intestinal bacteria in the large intestine.

Among the given options, the correct statement about immunodeficiency is "The causative agent in acquired immune deficiency syndrome (AIDS) is a virus that recognizes CD4 proteins".

The purpose of hydrogenating unsaturated fats is to make them more solid at room temperature as it is easy store the product.

During the light reactions of photosynthesis the energy from sunlight is absorbed by the pigment chlorophyll present in the chloroplasts of the leafs.

We know that, the nucleotide in DNA is of the form deoxyribose + phosphate group + polymerase.

Hence, Deoxyribose + Phosphate Group + Thymine is the only option in that form of nucleotide in DNA.

Niacin is the name for vitamin(B3).

Liver can produce small amount of niacin from tryptophan.

To produce 1 mg of niacin we require 60 mg of tryptophan.