STD 12 - 8. microbes in human welfare - Rajasthan Board (RBSE) STD 12 Science BIOLOGY Questions - Vidyadip

Question types

STD 12 - 8. microbes in human welfare question types

386 questions across 1 question group — pick any mix to generate a BIOLOGY paper with step-by-step answer keys.

386

Questions

1

Question groups

5

Question types

M.C.Q (0.5 Marks)

Sample Questions

STD 12 - 8. microbes in human welfare questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q (0.5 Marks)1 Mark

Match List $I$ with List $II$

List $I$	List $II$
$A$. Clostridium butylicum	$1$. Ethanol
$B$.Saccharomycescerevisiae	$II$. Streptokinase
$C$.Trichodermapolysporum	$III$. Butyric acid
$D$. Streptococcus sp.	$IV$.Cyclosporin-$A$

Choose the correct answer from the options given below:

A
$A-II, B-IV, C-III, D-I$
✓
$A-III, B-I, C-IV, D-II$
C
$A-IV, B-I, C-III, D-II$
D
$A-III, B-I, C-II, D-IV$

Answer: B.

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Q 2M.C.Q (0.5 Marks)1 Mark

Identify the microorganism which is responsible for the production of an immunosuppressive molecule cyclosporin $A:$

A
Clostridium butylicum
B
Aspergillus niger
C
Streptocaccus cenevisiae
✓
Trichoderma polysporum

Answer: D.

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Q 3M.C.Q (0.5 Marks)1 Mark

Match the following columns and select the correct option:

Column $I$	Column $II$
($a$) Dragonflies	($i$) Biocontrol agents of several plant pathogens
($b$) Bacillus	($ii$) Get rid of Aphids thuringiensis and mosquitoes
($c$) Glomus	($iii$) Narrow spectrum insecticidal applications
($d$) Baculoviruses	($iv$) Biocontrol agents of lepidoteran plant pests
	($v$) Absorb phosphorus from soil

✓
$(a)-(ii), (b)-(iv), (c) -(v), (d)-(iii)$
B
$(a)-(iii), (b)-(v), c-(iv), (d)-(i)$
C
$(a)-(ii), (b)-(i), c-(iii), (d)-(iv)$
D
$(a)-(ii), (b)-(iii), c-(iv), (d)-(v)$

Answer: A.

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Q 4M.C.Q (0.5 Marks)1 Mark

Which of the following is put into Anaerobic sludge digester for further sewage treatment$?$

✓
Activated sludge
B
Primary sludge
C
Floating debris
D
Effluents of primary treatment

Answer: A.

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Q 5M.C.Q (0.5 Marks)1 Mark

For the commercial and industrial production of Citric Acid, which of the following microbes is used?

A
Clostridium butylicum
✓
Aspergillus niger
C
Lactobacillus sp
D
Saccharomyces cerevisiae

Answer: B.

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