Microbes in Human Welfare - Online Test
Q1. Micro-organisms that grow in milk and convert it to curd is commonly called
Answer : Option A
Explaination / Solution:
The micro-organisms that grow in milk and convert it to curd is commonly called lactic acid bacteria. Micro-organism such as Lactobacillus and others commonly called as lactic acid bacteria (LAB).
Q2. Ethanol is commercially produced through a particular species of
Answer : Option A
Explaination / Solution:
Saccharomyces is an yeast which is used to ferment sugar to produce ethanol in absence of oxygen or by anaerobic respiration.
Q3. The puffed-up appearance of dough is due to production of
Answer : Option B
Explaination / Solution:
The puffed-up appearance of dough is due to production of gas. Baking soda (sodium hydrogen carbonate) on heating release carbon dioxide gas along with sodium carbonate.
Q4. Which of the following bacterium produces butyric acid?
Answer : Option A
Explaination / Solution:
Clostridium butylicum is used to produce butyric acid. Butyric acid is important industrial chemicals used to process food items.
Q5. The most common fungal partners of mycorrhiza are ______ species.
Answer : Option C
Explaination / Solution:
Mycorrhiza is symbiotic association between fungus and angiosperms. The most common fungal partners of mycorrhiza are Glomus species.
Q6. Yeast is used in the production of
Answer : Option C
Explaination / Solution:
Yeast is used in the production of bread and beer. Beer production involves production of ethyl alcohol. Bread is produced by fermentation process.
Q7. Which of the followings is also called sac fungi that live parasitically and in various habitats?
Answer : Option A
Explaination / Solution:
Ascomycetes is called as sac fungi that live parasitically and in various habitats. They are responsible for a number of fungal disease in plants.
Q8. Humulin is a
Answer : Option B
Explaination / Solution:
Humulin is protein that contains insulin isophane and insulin regular. It’s a manmade hormone that lowers the blood sugar level in blood.
Q9. First organic acid produced by microbial fermentation is
Answer : Option D
Explaination / Solution:
Lactic acid occurs in two isomeric forms i.e. L (+) and D (-) isomers, and as a racemic mixture (DL-lactic acid). The isolation of lactic acid from milk was done in 1798. It was the first organic acid produced by microorganisms in 1880. Today, lactic acid is competitively produced both by microbiological and chemical methods.
Q10. Vinegar is obtained from molasses with the help of
Answer : Option C
Explaination / Solution:
Vinegar is chemically diluted acetic acid which is produced by fermentation of molasses in presence of yeast and Acetobactor.
