Free Microbes In Human Welfare (Weekly Quiz: 2) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

Assertion :
Use of fertilizers greatly enhances crop productivity.
Reason :
Irrigation is very important in increasing crop productivity.

(a) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

(b) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

(c) If Assertion is true but Reason is false.

(d) If both Assertion and Reason are false.

Question-2

A genetically engineered bacteria used for clearing oil spills is :

(a) Bacillus subtilis

(b) Escherichia coli

(c) Agrobacterium tumefacient

(d) Pseudomonas putida

Question-3

Assertion (A) Chemical pesticides are preferred over biopesticides.
Reason (R) Chemical pesticides are mostly expensive, hazardous and pollute the atmosphere.

(a) If both A and R are true, but R is not correct explanation of A

(b) If both A and R are true and R is the correct explanation of A

(c) If A is true, but R is false

(d) If A is false, but R is true

Question-4

Yeast (Saccharomyces cerevisiae) is used in the industrial production of

(a) tetracyclin

(b) butanal

(c) citric acid

(d) ethanol

Question-5

An alga which can be employed as food for human being is

(a) Spirogyra

(b) Ulothrix

(c) Chlorella

(d) Polysiphonia.

Question-6

Choose the incorrect pair.

(a) Pectinases and proteases – Used in clarifying bottled juices

(b) Lipases – Used in detergents for removing oil stains

(c) Statins – Competitively inhibit the enzyme responsible for cholesterol synthesis

(d) None of the above

Question-7

Lactic acid bacteria convert milk into curd and improves its nutritional quality by enhancing

(a) vitamin B

(b) vitamin A

(c) vitamin C

(d) vitamin D

Question-8

Select the group of organisms that are used as biofertilisers in organic farming.

(a) Trichoderma, Baculovirus and B. thuringiensis

(b) Clostridium, Beijerinckia, Glomus and Anabaena

(c) Nostoc, Azolla pinnata and Tobacco mosaic virus

(d) Penicillium, Streptococcus and Aspergillus

Question-9

Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?

(a) Acetobacter aceti – acetic acid

(b) Yeast – statins

(c) Clostridium butylicum – lactic acid

(d) Aspergillus niger – citric acid

Question-10

Baker's yeast is _________.

(a) Saccharomyces florentinus

(b) Saccharomyces cariocanus

(c) Saccharomyces cerevisiae

(d) Saccharomyces spencerorum