Microbes in Human Welfare Practice Questions
NEET · Biology · 1007 free MCQs with instant results and detailed explanations.
1007
Total
207
Easy
450
Medium
350
Hard
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Topics in Microbes in Human Welfare
Sewage Treatment
202
Biogas
203
Microbes in Household
201
Biocontrol and Biofertilisers
205
Industrial Products
196
Sample Questions from Microbes in Human Welfare
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
Which of the following microbes is commonly used in the production of yogurt?
A.
Lactobacillus bulgaricus
B.
Escherichia coli
C.
Staphylococcus aureus
D.
Salmonella enterica
Show Answer & Explanation
Correct Answer: A
Lactobacillus bulgaricus is a bacteria that ferments lactose to produce lactic acid, which thickens milk and gives yogurt its texture and flavor.
Q2
Easy
Which microorganism is used in the fermentation process of bread?
A.
Bacillus cereus
B.
Saccharomyces cerevisiae
C.
Clostridium botulinum
D.
Mycobacterium tuberculosis
Show Answer & Explanation
Correct Answer: B
Saccharomyces cerevisiae, commonly known as baker's yeast, ferments sugars in dough, producing carbon dioxide that helps the bread rise.
Q3
Easy
Which of the following is a primary role of microbes in sewage treatment?
A.
Decomposition of organic matter
B.
Production of antibiotics
C.
Photosynthesis
D.
Fermentation
Show Answer & Explanation
Correct Answer: A
Microbes help decompose organic matter in sewage, breaking it down into simpler substances and cleaning the water.
Q4
Medium
Which of the following microbes is commonly used in the production of yogurt?
A.
Lactobacillus
B.
Escherichia coli
C.
Streptococcus pneumoniae
D.
Bacillus subtilis
Show Answer & Explanation
Correct Answer: A
Lactobacillus is a type of bacteria specifically known for its role in fermenting lactose in milk, leading to the production of yogurt.
Q5
Medium
What role do fungi play in household composting?
A.
Pathogen control
B.
Decomposition
C.
Nitrogen fixation
D.
Photosynthesis
Show Answer & Explanation
Correct Answer: B
Fungi are crucial in breaking down organic matter in compost, facilitating decomposition and nutrient cycling.
Q6
Medium
Which of the following is a beneficial role of bacteria in the household?
A.
Causing food spoilage
B.
Producing antibiotics
C.
Producing carbon dioxide
D.
Causing infections
Show Answer & Explanation
Correct Answer: B
Some bacteria can produce antibiotics that are beneficial for health, contrasting with those that cause spoilage or disease.
Q7
Medium
Which of the following microbial processes can help reduce food waste at home?
A.
Fermentation
B.
Photosynthesis
C.
Respiration
D.
Synthesis
Show Answer & Explanation
Correct Answer: A
Fermentation is a microbial process that can preserve food and reduce waste by converting sugars into acids or alcohol.
Q8
Hard
Which of the following microorganisms is primarily used in the production of vinegar through the fermentation of ethanol?
A.
Acetobacter
B.
Saccharomyces
C.
Lactobacillus
D.
Bacillus
Show Answer & Explanation
Correct Answer: A
Acetobacter is the bacterium responsible for converting ethanol into acetic acid, which is the main component of vinegar, through aerobic fermentation.
Q9
Hard
Which of the following microbes is most commonly used in the preparation of curd from milk?
A.
Bacillus subtilis
B.
Streptococcus thermophilus
C.
Lactobacillus acidophilus
D.
Escherichia coli
Show Answer & Explanation
Correct Answer: C
Lactobacillus acidophilus is a key bacterium used in the fermentation of milk to produce curd, as it converts lactose into lactic acid, thickening the milk.
Q10
Hard
In the context of household cleaning, which microorganism is known for its ability to biodegrade organic substances, making it effective in eco-friendly cleaning products?
A.
Pseudomonas aeruginosa
B.
Bacillus thuringiensis
C.
Streptomyces
D.
Aspergillus niger
Show Answer & Explanation
Correct Answer: C
Streptomyces is a genus of bacteria known for their ability to decompose organic materials, making them useful in eco-friendly cleaning products for biodegradation.
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Microbes in Human Welfare — NEET Biology Practice Questions Online
This page contains 1007 practice MCQs for the chapter Microbes in Human Welfare in NEET Biology. The questions are organized by difficulty — 207 easy, 450 medium, 350 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.