Which of the following plant pigments absorbs in red and far-red region of light?

• Chlorophyll

• Phytochrome

• Cryptochrome

• Carotenoids

The process through which excess of light energy is dissipated in photosynthesis is known as

• scavenging

• photolysis

• photophosphorylation

• quenching

AIDS virus destroys

• monocytes

• neutrophils

• basophils

• lymphocytes

The Sigmoid colon is part of

• anal canal

• large intestine

• ileum

• small intestine

The presence of cobalt in vitamin B₁₂ was established for the first time by

• spectroscopy

• borax-Bead test

• sodium nitroprusside test

• hydrolysis test

Which bacterial strain developed from natural isolates by genetic manipulations can be used for treating oil spills?

• Agrobacterium

• Clostridium

• Nitrosomonas

• Pseudomonas

Thiamidine dimer formation in DNA is caused by

• X-rays

• β and γ-rays

• UV-rays

• IR-rays

158.

The outer skin most of the crustaceans are made up of a carbohydrate. This carbohydrate is

• cellulose

• galactose

• chitin

• starch

Blood pressure may be increased by the excessive secretion of

• Thyroxine

• Testosterone

• Estradiol

• Estrol

The particulate Matter (PM-10) exhaled from the polluted atmosphere is often filtered out during the process of

• Coughing

• Sneezing

• Both (a) and (b)

• Urination