Microbes in Industry and Daily Life

Q. Which of the following are the uses of Lactobacillus?

1. Production of curd, cheese, cocoa
2. To treat abdominal discomfort
3. Production of leavened fodder
4. Provides rigidity to jute bags

Q. What process takes place when yeast is added to grape juice and left for a week?

1. Decomposition
2. Fermentation
3. Distillation
4. Sedimentation

Q.

Are prokaryotic cells aerobic?

Q.

Differentiate between curdling and fermentation .

Q.

______ a fungus produces penicillin.

Q. Choose the correct option.​

Statement 1: Anthrax is caused by a bacterium.​
Statement 2: Anthrax spreads through contaminated soil.​

1. Both statements are incorrect​.
2. Only statement 1 is correct.
3. Both statements are correct​.
4. Only statement 2 is correct​.

Q. The microorganism which is used for the production of alcohol and wine is

1. Nostoc
2. Lactobacillus
3. Saccharomyces cerevisiae
4. Acetobacter aceti

Q. Question 1 (c)
Alcohol is produced with the help of ___.

Q. The bread or idli dough rises because of

1. Heat
2. Grinding
3. Fermentation
4. Kneading

Q. Which of the following diseases is an animal disease?

1. Bud rot
2. Anthrax
3. Quickwilt
4. Blight disease

Q. Name the process in which sugar is converted into alcohol?

1. Fermentation
2. Respiration
3. Bubbling
4. Dissection

Q. Ria was suffering from stomach pain, bloating and excessive gas. Her mother suggested her to have yoghurt. Why?

1. Yoghurt helps in digestion.
2. Yoghurt contains Lactobacillus, that kills harmful bacteria.
3. Yoghurt contains Clostridium, that kills harmful bacteria.
4. Yoghurt helps to improve our immunity.

Q. Classify churning of milk cream to get butter as a physical or a chemical change. Give reasons.

Q. Rabies attacks the .

1. digestive system
2. nervous system
3. circulatory system
4. reproductive system

Q. What process takes place when yeast is added to grape juice and left for a week?

1. Fermentation
2. Decomposition
3. Distillation
4. Sedimentation

Q. ______ is used for the production of alcohol and wine.

1. Algae
2. Ant
3. Mosquito
4. Yeast

Q. Leavened bread is produced with the help of .

1. S. cerevisiae
2. P. putida
3. A. oryzae

Q. Microorganisms help in the formation of curd from milk.

1. False
2. True

Q. During alcoholic fermentation, ethanol and carbon dioxide are produced.

1. True
2. False

Q. Sort the following steps, which are used in cheese manufacturing.

1. Milk curdling
2. Curd processing
3. Salting
4. Ripening

Q. Select the products which we obtain from fungi.

1. Bread
2. Wine
3. Antibiotics
4. Cheese
5. Cyclosporin
6. Carnauba Wax
7. Wine cork
8. Bagasse

Q. Name one commercial use of Yeast.