Daily Practice Problems Microbes in Human Welfare

Question 1:

Conversion of milk into curd increases its nutritional quality by increasing the content of: [Level: Moderate]

(a) vitamin B₁

(b) vitamin B₁₂

(d) vitamin B₅

Question 2:

The traditional drink of southern India made by fermenting sap from palms is: [Level: Moderate]

(a) toddy

(b) thandai

(d) sambhara

Question 3:

Large holes in Swiss cheese is due to release of large amount of CO₂by: [Level: Moderate]

(a) Propionibacterium sharmanii

(b) Penicillium notatum

(d) Lactobacillus acidophilus

Question 4:

The first antibiotic to be discovered was: [Level: Easy]

(a) Erythromycin

(b) Ampicillin

(d) Tetracyclin

Question 5:

The microbe used in the production of citric acid is: [Level: Easy]

(a) Aspergillus niger

(b) Acetobacter aceti

(d) Lactobacillus acidophilus

Question 6:

Which among the following statements with respect to ‘antibiotics’ is incorrect? [Level: Difficult]

(a) Antibiotics are ‘against life’ with respect to disease-causing organisms but ‘pro-life’ for humans

(b) The discovery of first antibiotic ‘penicillin’ was a chance discovery made by Alexander Flemming while working on Staphylococcus bacteria.

(d) Antibiotics have greatly reduced our capacity to treat deadly diseases like plague, whooping cough, diphtheria and leprosy.

Question 7:

Which of the following is commercialised as ‘blood-cholesterol lowering agents’? [Level: Easy]

(a) Statins

(b) Streptokinase

(d) Penicillin

Question 8:

Immunosuppressant cyclosporin A is obtained from: [Level: Moderate]

(a) Monascus purpureus

(b) Saccharomyces cerevisiae

(d) Streptococcus sp.

Question 9:

The physical removal of large and small particles from the sewage through filtration and sedimentation is called: [Level: Moderate]

(a) Primary sludge

(b) Primary treatment

(d) Primary effluent

Question 10:

Which of the following is wrongly matched in the table given below? [Level: Difficult]

	Microbe	Product	Application
(a)	Monascus purpureus	Statins	Blood cholesterol lowering agents
(b)	Clostridium butylicum	Pectinase	Clarifying bottle juices
(c)	Trichoderma polysporum	Cyclosporin A	Immunosuppressive agents
(d)	Streptococcus	Streptokinase	Clot busters

Question 11:

Biological oxygen demand is not a measure of: [Level: Moderate]

(a) the rate of uptake of oxygen by microbes

(b) the organic matter present in the water

(d) the rate of release of oxygen by microbes

Question 12:

Read the following statements: [Level: Difficult]

I. Biogas production is carried out by the activity of aerobic bacteria on animal excreta.

II. Biogas is also called ‘gobar gas’and consists of purely methane.

III. Methanobacterium is an anaerobic bacterium found in the rumen of cattle.

IV. Activated sludge during sewage treatment is a right source of aerobic bacteria.

In the light of above statements, identify the set of statements which are correct.

(a) I, II, III

(b) II, III, IV

(d) III, IV only

Question 13:

Which of the following were responsible in the development of technology of biogas production in India? [Level: Moderate]

(a) Indian Agricultural Research Institute (IARI) and Khadi and Village Industries
Commission (KVIC).

(b) Indian Council of Agricultural Research (ICAR) and Khadi and Village Industries Commission (KVIC)

(d) Indian Agricultural Research Institute (IARI) and Khadi and Vigyan Industries
Commission (KVIC)

Question 14:

Which among the following alcoholic beverages is not produced by distillation of fermented broth? [Level: Moderate]

(a) Rum

(b) Beer

(d) Whisky

Question 15:

Ladybird is used as a biocontrol agent against: [Level: Moderate]
(a) mosquitoes

(b) aphids

(d) fungal pathogens

Question 16:

Statement I: [Level: Difficult]
Many members of genus Glomus form mycorrhiza, a symbiotic association between fungi and roots of higher plants.

Statement II:

Plants with mycorrhizal associations have resistance to root-borne pathogens, tolerance to salinity and drought, and an overall increase in the plant growth and development.

With respect to the statements given above, choose the correct answer from the options given below:

(a) Statement I is correct but Statement II is incorrect.

(b) Statement I is incorrect but Statement II is correct.

(d) Both Statement I and Statement II are correct.

Question 17:

Match the items given in Column I to Column II and find the correct answer from the options given below: [Level: Difficult]

Column I	Column II
1. Nucleopolyhedrovirus	(i) Alcoholic fermentation
2. Rhizobium	(ii) Biofertiliser
3. Saccharomyces	(iii) Biocontrol agent
4. Trichoderma polysporum	(iv) Bioactive molecules

	1.	2.	3.	4.
(a)	(iii)	(ii)	(iv)	(i)
(b)	(ii)	(iii)	(iv)	(i)
(c)	(iii)	(ii)	(i)	(iv)
(d)	(ii)	(iii)	(iv)	(i)

Question 18:

‘Flocs’ during biological treatment of sewage refers to: [Level: Moderate]

(a) masses of bacteria associated with fungal filaments

(b) masses of bacteria

(d) masses of anaerobic bacteria

Question 19:

Biogas predominantly consists of which among the following gases? [Level: Easy]

(a) Hydrogen sulphide

(b) Hydrogen

(d) Carbon dioxide

Question 20:

Which of the following is a symbiotic nitrogen-fixing bacterium? [Level: Easy]

(a) Rhizobium

(b) Anabaena

(d) Azotobacter

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You must have heard of the phrase “Practice makes a man perfect”. Well, not just a man, practice indeed enhances perfection of every individual.

Practicing questions plays a pivotal role in achieving excellence in exams. Just as the adage goes, "Practice makes perfect," dedicating time to solve a diverse range of exam-related questions yields manifold benefits. Firstly, practicing questions allows students to familiarize themselves with the exam format and types of problems they might encounter. This familiarity instills confidence, reducing anxiety and improving performance on the actual exam day. Secondly, continuous practice sharpens problem-solving skills and enhances critical thinking, enabling students to approach complex problems with clarity and efficiency. Thirdly, it aids in identifying weak areas, allowing students to focus their efforts on improving specific topics. Moreover, practice aids in memory retention, as active engagement with the material reinforces learning. Regular practice also hones time management skills, ensuring that students can allocate appropriate time to each question during the exam. Overall, practicing questions not only boosts exam performance but also instills a deeper understanding of the subject matter, fostering a holistic and effective learning experience.

All About Daily Practice Problems on NEET Biology Microbes in Human Welfare NCERT Chapter 10

Our Daily Practice Problems (DPPs) offer a diverse range of question types, including Multiple Choice Questions (MCQs) as well as short and long answer types. These questions are categorized into Easy, Moderate, and Difficult levels, allowing students to gradually progress and challenge themselves accordingly. Additionally, comprehensive solutions are provided for each question, available for download in PDF format - Download pdf solutions as well as Download pdf Questions. This approach fosters a holistic learning experience, catering to different learning styles, promoting self-assessment, and improving problem-solving skills. With our well-structured DPPs, students can excel in exams while gaining a deeper understanding of the subject matter. Hope you found the content on NEET Biology Microbes in Human Welfare NCERT Chapter 10 useful.

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