Skip to main content
Super TutorResources
Chapter 10 of 15
QuestionsNotesFlashcardsSummaryFormulasQuizConceptsSyllabusPlan
Revision Notes

Microbes in Human Welfare

ICSE · Class 12 · Biology

Quick revision notes for Microbes in Human Welfare — ICSE Class 12 Biology. Key concepts, formulas, and definitions for last-minute revision.

60 questions31 flashcards5 formulas

Interactive on Super Tutor

Studying Microbes in Human Welfare? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for revision notes and more.

Try Super Tutor — Free

1,000+ Class 12 students started this chapter today

An infographic illustrating the different types of microbes (bacteria, fungi, viruses, protozoa, prions) with representative examples and their general characteristics or shapes.
Super Tutor

This is just one of 14+ visuals inside Super Tutor's Microbes in Human Welfare chapter

Explore the full set

Key Topics to Revise

1

  • Curd: Lactobacillus (LAB) converts milk lactose to lactic acid; acid coagulates casein; increases vitamin B12
  • Yoghurt: Lactobacillus bulgaricus + Streptococcus thermophilus at 40°C
  • Bread: Saccharomyces cerevisiae (baker's yeast) produces CO2 — leavens dough
2

  • Beer/wine: Saccharomyces cerevisiae ferments sugar → ethanol + CO2 (anaerobic: fermentation)
  • Beer/wine: NO distillation (3-13% alcohol)
  • Whisky/brandy/rum: distillation of fermented grain/sugarcane mash to concentrate alcohol
3

  • Definition: chemical substances produced by microorganisms that inhibit growth or destroy other microorganisms
  • Penicillin: discovered by Alexander Fleming (1928) from Penicillium notatum (mould contaminating Staphylococcus culture)
  • Later developed by Howard Florey and Ernst Chain for therapeutic use (Nobel Prize 1945)
4

  • Citric acid: Aspergillus niger (fungus) — used in food, beverages, pharmaceuticals
  • Acetic acid (vinegar): Acetobacter aceti (bacterium) — oxidises ethanol to acetic acid
  • Ethanol: Saccharomyces cerevisiae — fermentation of sugars

Get complete notes with diagrams and examples

Full Notes

Revision Notes

Detailed revision notes for Microbes in Human Welfare including key definitions, important diagrams, formulas, and concepts.

Get Full Notes

Frequently Asked Questions

What are the important topics in Microbes in Human Welfare for ICSE Class 12 Biology?
Key topics in Microbes in Human Welfare include Microbes in Food Industry, Industrial Chemicals and Enzymes from Microbes, Bt Toxin Mechanism of Action. These are the concepts ICSE Class 12 examiners draw on most — study them first, then practise related questions.
How to score full marks in Microbes in Human Welfare — ICSE Class 12 Biology?
Understand the core concepts first, then work through the 60 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Microbes in Human Welfare

All 15 chapters — ICSE Class 12 Biology Revision Notes

For serious students

Get the full Microbes in Human Welfare chapter — for free.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for ICSE Class 12 Biology.

Try Super Tutor Free
Try the full chapter — Free