51.

Creosote is used to prevent:

• rusts of wheat

• dry rot of wood

• loose smut of oats

• brown rust of barley

Which of the following insecticide is obtained from the roots of Derris elliptica ?

• Cinerin

• Nicotine

• Rotenone

• Pyrethrum

The pioneer country in the production of fuel alcohol is

• Saudi Arabia 

• Iran, Iraq

• Brazil

• Japan

Which of the following gland is often referred in relation with AIDS

• Thyroid

• Thymus

• Adrenal

• Pancreas

Which one of the following bacterium is used extensively as biopesticide?

• Bacillus subtilis

• Bacillus thuringiensis

• Streptococcus lactis

• Lactobacillus acidophilus

Koch's postulates are not applicable to

• TB 

• leprosy

• cholera

• diphtheria

Name one frequently used fungicide

• griseofulvin

• chloramphenicol

• cycocel

• ethylene

Increase of BOD in water leads to

• increase in the dissolved O₂ concentration

• decrease in the dissolved O₂ concentration

• maintenance of dissolved O₂ concentration at the same level

• no effect on dissolved O₂ concentration

Genetically engineered bacteria are being employed for production of

• thyroxin

• human insulin

• cortisol

• epinephrine

Which one of the following is biological insecticide?

• Tiger beetle

• Caterpillar

• Silkmoth

• Mazra poka