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Class 12 Biology: Microbes in Human Welfare — Chapter Test 1

Class 12 • Biology • Microbes in Human Welfare • Chapter Test

MediumFREE

15

Questions

20 min

Duration

15

Marks (1 each)

No

Negative marking

Original practice questions with full solutions by ExamPortal.

Instructions

  • • Read each question carefully and pick the correct answer.
  • • You can mark questions for review and come back to them.
  • • Answers are saved automatically.
  • • The test is submitted automatically when time runs out.

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This test is completely free.

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SYLLABUS & QUESTION BLUEPRINT

Sample Practice Questions

Preview 5 sample questions from this 15-question test. Test your knowledge below or take the full exam in timed CBT mode.

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Question 1 of 15
Lactobacillus converts milk into curd by producing:
A
acetic acid
B
lactic acid
C
citric acid
D
ethanol
View Correct Answer & Step-by-Step Solution
Correct Option:(B)lactic acid

Detailed explanation is available inside the official test attempt review.

Question 2 of 15
The large holes in Swiss cheese are made by CO₂ from:
A
Lactobacillus
B
Propionibacterium sharmanii
C
yeast
D
Penicillium
View Correct Answer & Step-by-Step Solution
Correct Option:(B)Propionibacterium sharmanii

Detailed explanation is available inside the official test attempt review.

Question 3 of 15
Penicillin was discovered by:
A
Louis Pasteur
B
Alexander Fleming
C
Robert Koch
D
Edward Jenner
View Correct Answer & Step-by-Step Solution
Correct Option:(B)Alexander Fleming

Detailed explanation is available inside the official test attempt review.

Question 4 of 15
Baker's yeast is:
A
Lactobacillus
B
Saccharomyces cerevisiae
C
Aspergillus niger
D
Rhizobium
View Correct Answer & Step-by-Step Solution
Correct Option:(B)Saccharomyces cerevisiae

Detailed explanation is available inside the official test attempt review.

Question 5 of 15
Citric acid is produced commercially by:
A
Aspergillus niger
B
Acetobacter aceti
C
Clostridium
D
Lactobacillus
View Correct Answer & Step-by-Step Solution
Correct Option:(A)Aspergillus niger

Detailed explanation is available inside the official test attempt review.

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Frequently asked questions

How many questions are there in Class 12 Biology: Microbes in Human Welfare — Chapter Test 1?

There are 15 questions to answer in 20 min. Each correct answer gives 1 mark, for a total of 15 marks.

Is there negative marking?

No. Wrong answers do not lose marks, so attempt every question.

Is this mock test free?

Yes, it is completely free. Just log in with your email to start.

What does this test cover?

It covers the chapter "Microbes in Human Welfare" of Class 12 Biology. All questions are original, with a full solution for each.

Will I see my result and the solutions?

Yes. Right after you submit you get your score, accuracy, rank and percentile, and you can review every question with the correct answer and a step-by-step explanation.

Can I take this test again?

Yes, you can retake it as many times as you like and compare your scores.