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Published on: 25/05/2021
QB365 Provides the updated NCERT Examplar Questions for Class 12 Biology, and also provide the detail solution for each and every ncert examplar questions , QB365 will give all kind of study materials will help to get more marks
Download CBSE Class 12th Standard CBSE Biology question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Biology
Questions + Answers key
Take MCQ Biology Test1.
Which one of the following alcoholic drinks is produced without distillation?
Wine
Whisky
Rum
vitamin E.
2.
The vitamin whose content increases following the conversion of milk into curd by lactic acid bacteria
vitamin C
vitamin D
vitamin B12
vitamin E.
3.
Which one is the most important role of microorganism of the well being of humans?
sewage treatment
production of methane
production of SO2
conversion of milk to curd
4.
Activated sludge should have the ability to settle quickly so that it can
be rapidly pumped back from sedimentation to aeration tank
absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank
be discarded and anaerobically digested
absorb colloidal organic matter
5.
Methanogens do not produce
oxygen
methane
hydrogen sulfide
carbon dioxide
6.
Mycorrhiza does not help the host plant in:
Enhancing its phosphorus uptake capacity
Increasing its tolerance to drought
Enhancing its resistance to root pathogens
Increasing its resistance to insects
7.
In fermentation of dough which is the main gas produced?
Carbon dioxide
Hydrogen
Both (a) and (b)
Methane
1.
(a)
Wine
2.
(c)
vitamin B12
3.
(a)
sewage treatment
4.
(a)
be rapidly pumped back from sedimentation to aeration tank
5.
(a)
oxygen
6.
(d)
Increasing its resistance to insects
7.
(a)
Carbon dioxide
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