Biology Objective Questions and Answers: Microbes In Human Welfare
Review structured MCQ sets for NEET Biology Microbes In Human Welfare. Built according to official NEET guidelines, these downloadable questions support daily revision and core concept reinforcement.
Download Microbes In Human Welfare MCQs with Answers
View or download the dedicated Microbes In Human Welfare MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Biology evaluations.
Multiple Choice Questions
(a) It provides the required growth conditions like temperature, pH, substrate, salts, vitamins and oxygen
(b) The transformed recombinant cells are allowed to grow in a large bioreactor till the maximum amount of biochemical is formed
(c) The bioreactor is emptied, cleaned and a fresh medium is added
(d) There is regular drainage of used medium and culture cells from one side and fresh medium is added from the other, leading to a higher yield of the desired product
Show Answer & Explanation
Answer: (d) There is regular drainage of used medium and culture cells from one side and fresh medium is added from the other, leading to a higher yield of the desired product
Explanation:
1. In continuous culture the used medium is drained from one side while fresh medium is added from the other.
2. The cells stay in the active exponential growth phase, so the yield is higher.
Teacher's Note:
1. Statements (b) and (c) describe batch culture.
(a) Bacillus thuringiensis
(b) Nucleopolyhedrovirus
(c) Trichoderma
(d) Agrobacterium
Show Answer & Explanation
Answer: (d) Agrobacterium
Explanation:
1. Bacillus thuringiensis, Baculoviruses (NPV) and Trichoderma are used as biocontrol agents.
Teacher's Note:
1. Agrobacterium is used as a vector to transfer genes into plants, and it also causes crown gall disease.
(a) Cyclosporin-A
(b) Streptokinase
(c) Statin
(d) All of the above
Show Answer & Explanation
Answer: (c) Statin
Explanation:
1. Statins, obtained from the yeast Monascus purpureus, inhibit the enzyme that synthesises cholesterol.
Teacher's Note:
1. Cyclosporin-A is an immunosuppressant and streptokinase is a clot buster.
(a) Wine
(b) Whisky
(c) Rum
(d) Both (b) and (c)
Show Answer & Explanation
Answer: (d) Both (b) and (c)
Explanation:
1. Whisky, brandy and rum are made by distilling the fermented broth.
2. Wine and beer are not distilled.
Teacher's Note:
1. Yeast (Saccharomyces cerevisiae) does the fermentation.
(a) CO2
(b) CO
(c) Methane
(d) H2
Show Answer & Explanation
Answer: (c) Methane
Explanation:
1. Methanogens such as Methanobacterium produce methane, which makes up most of biogas.
2. Carbon dioxide and hydrogen are also present in smaller amounts.
Teacher's Note:
1. Methane is the combustible part.
(a) a-ii, b-iv, c-i, d-iii
(b) a-iii, b-iv, c-i, d-ii
(c) a-ii, b-i, c-iv, d-iii
(d) a-iv, b-ii, c-i, d-iii
Show Answer & Explanation
Answer: (a) a-ii, b-iv, c-i, d-iii
Explanation:
1. Aspergillus niger gives citric acid, Acetobacter aceti gives acetic acid, Clostridium butylicum gives butyric acid and Lactobacillus gives lactic acid.
Teacher's Note:
1. This is a standard NCERT list of organic acids.
(a) Saccharomyces cerevisiae
(b) Propionibacterium sharmanii
(c) Acetobacter aceti
(d) Streptococcus
Show Answer & Explanation
Answer: (a) Saccharomyces cerevisiae
Explanation:
1. Baker's yeast, Saccharomyces cerevisiae, produces carbon dioxide, which makes the dough rise.
2. Propionibacterium sharmanii is used for Swiss cheese.
Teacher's Note:
1. Acetobacter makes vinegar.
(a) Pectinases
(b) Streptokinase
(c) Polygalacturonase
(d) Adenosine deaminase
Show Answer & Explanation
Answer: (b) Streptokinase
Explanation:
1. Streptokinase is used as a clot buster in patients with myocardial infarction.
2. Pectinases clear fruit juices.
Teacher's Note:
1. Adenosine deaminase is used in gene therapy.
(a) Fungi
(b) Cyanobacteria
(c) Trichoderma
(d) Ladybird
Show Answer & Explanation
Answer: (b) Cyanobacteria
Explanation:
1. Cyanobacteria such as Anabaena, Nostoc and Oscillatoria fix atmospheric nitrogen in paddy fields.
2. They also add organic matter to the soil.
Teacher's Note:
1. Trichoderma is a biocontrol agent and the ladybird is an insect predator.
Microbes In Human Welfare Objective Questions & Solutions for NEET Biology
About Microbes In Human Welfare MCQs for NEET Biology
Test your conceptual understanding of Microbes In Human Welfare with these targeted multiple-choice questions. Designed in alignment with the latest NEET curriculum for NEET Biology, these problem sets build accuracy and prepare students for objective exams.
How to Verify Your MCQ Answers
Built using the official NCERT book for NEET, these Biology objective sets provide reliable academic guidance. Pair your practice with our recommended NCERT solutions to master optimal problem-solving approaches.
Enhance Speed with Online MCQ Tests
Wrap up your chapter revision by testing your knowledge against standard question formats. Everything on our platform is provided free of charge.
FAQs
You can get most exhaustive NEET Biology Microbes in Human Welfare MCQs Set 13 for free on StudiesToday.com. These MCQs for NEET Biology are updated for the 2026-27 academic session as per NEET examination standards.
Yes, our NEET Biology Microbes in Human Welfare MCQs Set 13 include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the NEET paper is now competency-based.
By solving our NEET Biology Microbes in Human Welfare MCQs Set 13, NEET students can improve their accuracy and speed which is important as objective questions provide a chance to secure 100% marks in the Biology.
Yes, Biology MCQs for NEET have answer key and brief explanations to help students understand logic behind the correct option as its important for 2026 competency-focused NEET exams.
Yes, you can also access online interactive tests for NEET Biology Microbes in Human Welfare MCQs Set 13 on StudiesToday.com as they provide instant answers and score to help you track your progress in Biology.