Introduction to Microbiology — Practice Quiz
Maharashtra Board · Class 10 · Science
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Which branch of biology studies enzymes, proteins, and molecular biology related to microbes for commercial use?
What happens to lactose during milk fermentation?
Which enzyme is used in modern cheese production to make it vegetarian?
Which yeast is commonly used in bread making?
Sample Questions
Which microbes are commonly used in yogurt production?
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Streptococcus thermophilus, Lactobacillus delbrueckii, Lactobacilli
Yogurt is produced using lactobacilli, specifically Streptococcus thermophilus and Lactobacillus delbrueckii in 1:1 proportion. Saccharomyces is used for bread and wine, while Aspergillus is used for citric acid production.
Probiotics help maintain intestinal health by:
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Increasing helpful digestive microbes, Decreasing harmful microbes like Clostridium, Improving resistance to diseases
Probiotics contain active bacteria that maintain balance of intestinal microorganisms by increasing helpful bacteria, decreasing harmful ones like Clostridium, and improving overall resistance.
Vinegar chemically contains:
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4% acetic acid
Vinegar is chemically 4% acetic acid (CH3COOH) produced by microbial degradation of ethanol using bacteria like Acetobacter and Glucanobacter.
Which products can be obtained through microbial fermentation?
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Wine from grapes, Coffee from Coffea arabica, Cocoa from Theobroma cacao
Microbial fermentation is used to produce various beverages: wine from grapes using Saccharomyces cerevisiae, coffee processing using Lactobacillus brevis, and cocoa processing using various yeasts.
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