Free Microbes In Human Welfare (Daily Quiz: 3) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

Cryl endotoxins obtained from Bacillus thuringiensis are effective against

(a) flies

(b) mosquitoes

(c) nematodes

(d) boll worms

Question-2

Bacillus thuringiensis (Bt) strains have been used as

(a) biometallurgical techniques

(b) biofertilizers

(c) biomineralization processes

(d) bioinsecticidal plants

Question-3

Which one of the microorganism is used for production of citric acid in industries ?

(a) Penicillium citrinum

(b) Lactobacillus bulgaricus

(c) Aspergillus niger

(d) Rhizopus nigricans

Question-4

Activated sludge should have the ability to settle quickly so that it can

(a) absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank

(b) be rapidly pumped back from sedimentation tank to aeration tank

(c) be discarded and anaerobically digested

(d) absorb colloidal organic matter

Question-5

Read the following four statements (A-D).

1. Colostrum is recommended for the new born because it is rich in antigens.
2. Chikungunya is caused by a Gram negative bacterium.
3. Tissue culture has proved useful in obtaining virus-free plants.
4. Beer is manufactured by distillation of fermented grape juice.

How many of the above statements are wrong?

(a) Four

(b) Two

(c) Three

(d) One