Self Studies
Self Studies
Self Studies
Self Studies

Biology & Human Welfare Test - 2

Result Self Studies

Biology & Human Welfare Test - 2
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0.25

    Micro-organisms that grow in milk and convert it to curd are  commonly called _________.

    Solution

    Microbes such as Lactobacillus  and others commonly called lactic acid bacteria (LAB) grow in milk and convert it into curd.

    Hence, the correct option is C.
    NCERT Reference: Topic- " MICROBES IN HOUSEHOLD PRODUCTS ”of chapter"Microbes in Human Welfare " of NCERT  

  • Question 2
    1 / -0.25

    Ethanol is commercially produced through a particular species of _________.

    Solution

    Saccharomyces is a yeast that is used to ferment sugar to produce ethanol in absence of oxygen or by anaerobic respiration.

    Hence, the correct option is B.
    NCERT Reference: Topic Fermented Beverages ”of chapter  "Microbes in Human Welfare " of NCERT.  

  • Question 3
    1 / -0.25

    The puffed-up appearance of dough is due to production of? 

    Solution

    • The puffed-up appearance of dough is due to the production of CO2 gas.
    • Baking soda (sodium hydrogen carbonate) on heating releases carbon dioxide gas along with sodium carbonate.

    Hence, the correct option is B.
    NCERT Reference: Topic-  MICROBES IN HOUSEHOLD PRODUCTS of chapter  "Microbes in Human Welfare "  of NCERT.  

  • Question 4
    1 / -0.25

    Which of the following bacterium produces butyric acid?

    Solution

    • Clostridium butylicum is used to produce butyric acid.
    • Butyric acid is an important industrial chemical used to process food items.

    Hence, the correct option is A.
    NCERT Reference: Topic-   Chemicals, Enzymes and other Bioactive Molecules ”of chapter  "Microbes in Human Welfare "  of NCERT.  

  • Question 5
    1 / -0.25

    The most common fungal partners of mycorrhiza are _________  species.

    Solution

    • Mycorrhiza is a symbiotic association between fungus and angiosperms.
    • The most common fungal partners of mycorrhiza are the Glomus species.

    Hence, the correct option is D.
    NCERT Reference:  Topic- MICROBES AS BIOFERTILISERS ”of chapter  "Microbes in Human Welfare "  of NCERT.  

  • Question 6
    1 / -0.25

    Yeast is used in the production of:

    Solution

    • Yeast is used in the production of alcohol , wine-making and in baking bread .
    • Saccharomyces cerevisiae is known as baker 's yeast and Saccharomyces ellipsoidens is called wine yeast. 

    Hence, the correct  option is D.
    NCERT Reference: Topic-  Fermented Beverages ”of chapter  "Microbes in Human Welfare "  of NCERT.  

  • Question 7
    1 / -0.25

    What do we collectively call the biogas producing bacteria?

    Solution

    • The biogas-producing bacteria are collectively known as methanogens and one such common bacterium is Methanobacterium.
    • These bacteria are commonly found in the anaerobic sludge during sewage treatment and also in the rumen of cattle.

    Hence, the correct option is D.

    NCERT Reference:  Topic- MICROBES IN PRODUCTION OF BIOGAS ”of chapter  "Microbes in Human Welfare "  of NCERT.  

  • Question 8
    1 / -0.25

    On which of the following factors does the type of gas produced depend?

    Solution

    • The type of gas produced depends upon the microbes and the organic substrates they utilise.
    • Example : In the fermentation of dough, cheese making and production of beverages, the main gas produced is CO2 .

    Hence, the correct option is C.
    NCERT Reference: Topic-  MICROBES IN PRODUCTION OF BIOGAS ”of chapter  "Microbes in Human Welfare "  of NCERT.  

  • Question 9
    1 / -0.25

    First organic acid produced by microbial fermentation is _________.

    Solution

    • The first organic acid produced by microbial fermentation was lactic acid.
    • Lactic acid is produced by the anaerobic respiration of glucose.

    Hence, the correct option is C.
    NCERT Reference: Topic-  Chemicals, Enzymes and other Bioactive Molecules ”of chapter  "Microbes in Human Welfare "  of NCERT.  

  • Question 10
    1 / -0.25

    Which type of alcoholic drinks are produced without distillation?

    Solution

    Wine and Beer are produced without distillation. Yeast, such as Saccharomyces cerevisiae, is used to ferment malted cereals and fruit juices to produce ethanol, which forms the basis of these alcoholic beverages. On the other hand, whisky, brandy, and rum are obtained through distillation of the fermented broth.

Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now