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Test: Microbes in Household Products (NCERT) - NEET MCQ


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5 Questions MCQ Test Biology Class 12 - Test: Microbes in Household Products (NCERT)

Test: Microbes in Household Products (NCERT) for NEET 2024 is part of Biology Class 12 preparation. The Test: Microbes in Household Products (NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Microbes in Household Products (NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Microbes in Household Products (NCERT) below.
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Test: Microbes in Household Products (NCERT) - Question 1

Microbes are present in

Detailed Solution for Test: Microbes in Household Products (NCERT) - Question 1

Microbes are omnipresent, which means they are found everywhere. They can be found in soil, water, air, ice, inside bodies of human beings, animals, and plants, and even in thermal vents.

Test: Microbes in Household Products (NCERT) - Question 2

Which of the following microbes is a proteinacious infectious agent? 

Detailed Solution for Test: Microbes in Household Products (NCERT) - Question 2

Prions are highly resistant glycoprotein particles which function as infectious agents. Prions can also act as catalyst converting normal protein into prion state. Prions are not affected by proteases, nucleases, temperature upto 800oC, UV radiations and formaldehyde.

Test: Microbes in Household Products (NCERT) - Question 3

Study the following statements regarding lactic acid bacteria (LAB) which are used to convert milk into curd.
(i) They produce adds that coagulate and partially digest the milk proteins.
(ii) A small amount of curd added to the fresh milk as an inoculum contains millions of LAB, which at suitable temperature, multiply and convert milk into curd.
(iii) Conversion of milk into curd improves its nutritional quality by increasing vitamin B12.
(iv) LAB may result in acidity in the stomach of human beings.
Which of the given statements are correct? 

Detailed Solution for Test: Microbes in Household Products (NCERT) - Question 3

Microbes such as. Lactobacillus and others commonly called lactic acid bacteria (LAB) grow in milk and convert it into curd. During growth, such bacteria produce adds (mainly lactic add) that coagulate and partially digest the milk proteins. A small amount of curd, known as starter, is added to the milk and kept at a suitable temperature, where lactic acid bacteria multiply in millions and converts milk into curd that also improves its nutritional quality by increasing vitamin B12. It also checks the growth of disease-causing microbes in the stomach.

Test: Microbes in Household Products (NCERT) - Question 4

Which one of the following combinations of organisms are responsible for the formation and flavour of yoghurt?

Detailed Solution for Test: Microbes in Household Products (NCERT) - Question 4

Yoghut (yogurt) is produced by curdling milk with the help of Streptococcus thermophillus and Lactobacillus bulgaricus. The temperature is maintained at about 45C(40−60C) for four hours. It has a flavour of lactic acid and acetaldehyde.

Test: Microbes in Household Products (NCERT) - Question 5

Which of the following food items is produced by the fermenting activity of microbes? 
(A) Idli
(B) Dosa
(C) Toddy
(D) Cheese

Detailed Solution for Test: Microbes in Household Products (NCERT) - Question 5

Cheese is one of the oldest milk products prepared with the help of microbes.The curd is separated from liquid part or whey to form cheese. Dosa, Upma are fermented preparation of rice and black gram. The two are allowed to ferment for 3-12 hours with air borne Leuconostoc and Streptococcus species of bacteria. Toddy is a traditional drink of some parts of South India which is made by fermentation of sap of palms.

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