Microbes in Human Welfare — Class 12 Biology NCERT Solutions (Free)
Free step-by-step NCERT solutions for Class 12 Biology chapter "Microbes in Human Welfare" — 8 important questions with detailed answers for CBSE board exam preparation.
TL;DR: Free step-by-step NCERT solutions for Class 12 Biology chapter "Microbes in Human Welfare" — 8 important questions with detailed answers for CBSE boar…
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Key Questions Covered:
- Define microbes.
- What is fermentation? Give two examples of fermentation products.
- What is the role of Lactobacillus in human welfare? Name any two products.
- + 5 more questions in the full chapter
Solutions Summary:
| Question | Status |
|---|---|
| Define microbes. | ✓ Solved |
| What is fermentation? Give two examples of fermentation p… | ✓ Solved |
| What is the role of Lactobacillus in human welfare? Name … | ✓ Solved |
Showing 3 of 8 questions
Q1: Define microbes.
Microbes are microscopic organisms that are not visible to the naked eye and require a microscope for observation. They include bacteria, fungi, protozoa, algae, and viruses. These organisms are found everywhere in nature - in soil, water, air, and even inside the human body.
Q2: What is fermentation? Give two examples of fermentation products.
Fermentation is an anaerobic process by which microorganisms break down organic compounds in the absence of oxygen, releasing energy and producing byproducts like ethanol and CO2.
Examples:
- Lactobacillus ferments milk to produce yogurt and cheese
- Saccharomyces cerevisiae (yeast) ferments glucos...
Q3: What is the role of Lactobacillus in human welfare? Name any two products.
Lactobacillus is a beneficial bacterium that plays a crucial role in human nutrition and health:
1. Produces lactic acid through fermentation which preserves food and prevents pathogenic growth
2. Aids in digestion and nutrient absorption in the human gut
3. Produces essential vitamins like B12 and...
Showing 3 of 8 questions. Visit the full page for complete solutions.