Chapter Exam

Chapter 6: Industrial Microbiology — Online MCQ Test

Q: Which of the following microorganisms is commonly used in the industrial production of penicillin?

Answer: A. Penicillium notatum — Penicillin was first obtained from Penicillium notatum. It is a classic example of an antibiotic produced by a fungus.

Q: The vessel in which microorganisms are grown for large-scale industrial production is called a ______.

Answer: B. Fermentor — A fermentor is a large vessel designed to provide controlled conditions for microbial growth and product formation.

Q: Why is sterilization of the fermentor necessary before inoculation?

Answer: B. To remove unwanted microorganisms — Sterilization prevents contamination by unwanted microbes and ensures that only the desired industrial strain grows.

MICROBIOLOGY · CLASS 12th · Tamil Nadu State Board

Practice Chapter 6: Industrial Microbiology with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 12th MICROBIOLOGY. This chapter covers: Exploring commercial applications this chapter covers how microorganisms are used on an industrial scale to synthesize valuable products. Students study fermentor design media form.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 6: Industrial Microbiology — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 12th MICROBIOLOGY — Chapter 6: Industrial Microbiology, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following microorganisms is commonly used in the industrial production of penicillin?

A. Penicillium notatum ✓
B. Lactobacillus acidophilus
C. Rhizobium leguminosarum
D. Saccharomyces cerevisiae

Answer: A. Penicillium notatum
Penicillin was first obtained from Penicillium notatum. It is a classic example of an antibiotic produced by a fungus.

The vessel in which microorganisms are grown for large-scale industrial production is called a ______.

A. Microscope
B. Fermentor ✓
C. Autoclave
D. Incubator

Answer: B. Fermentor
A fermentor is a large vessel designed to provide controlled conditions for microbial growth and product formation.

Why is sterilization of the fermentor necessary before inoculation?

A. To increase the size of the fermentor
B. To remove unwanted microorganisms ✓
C. To cool the medium instantly
D. To increase the pH of the medium

Answer: B. To remove unwanted microorganisms
Sterilization prevents contamination by unwanted microbes and ensures that only the desired industrial strain grows.

A fermentor shows poor product yield even though the microorganism is viable and nutrients are adequate. Which of the following is the most likely reason?

A. Lack of proper control of aeration and agitation ✓
B. Presence of too many glass slides
C. Use of a plastic Petri dish
D. Use of a bright light source

Answer: A. Lack of proper control of aeration and agitation
Insufficient aeration or agitation can reduce oxygen transfer and mixing, leading to poor growth and low product yield.

Which statement is most appropriate regarding the use of microorganisms in industrial production?

A. All industrial products are obtained only from wild microbial strains
B. Microorganisms are used because they can be grown rapidly and can synthesize specific valuable compounds ✓
C. Microorganisms are used only for decomposition of waste, not for products
D. Industrial microbiology does not require sterile conditions

Answer: B. Microorganisms are used because they can be grown rapidly and can synthesize specific valuable compounds
Microbes are preferred in industry because they multiply quickly and can produce useful compounds such as antibiotics, enzymes, and vaccines.