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12th Biology Weekly Test -1 ( Zoology - Microbes in Human Welfare )

St. Britto Hr. Sec. School - Madurai

12th Biology Weekly Test -1 ( Zoology - Microbes in Human Welfare )-Aug 2020

Time : 1.30 Hours

Part - A

Multiple Choice Question - Answer All Question

____________ is a prokaryotic organism helping to improve fertility of the soil.

Glomus
Azolla
legume
Tolypothrix

Rhizopus oryzae can produce ___________

Fumaric acid
Malic acid
Acetic acid
Citric acid

Corn \(\overset { A }{ \rightarrow } \) Fermentable sugars \(\overset { B }{ \rightarrow } \) Ethanol. Find out A and B for above statement.

A - Agaricus, B - Sarcina
A - Zymomonas, B - Vinegar
A - Rhizopus, B - Aspergillus
A - Aspergillus, B - Yeast

The first bio herbicide was got from ______________.

Trichoderma
Phytophthora species
Bacillus
Aspergillus

Genetically engineered______________ are used as dot buster in cardiac related issues.

Staphylococcus
Yeast
Penicillium
Streptococci

Which of the following microorganism is used for production of citric acid in industries?

Lactobacillus bulgaris
Penicillium citrinum
Aspergillus niger
Rhizopus nigricans

Identify the free liviiig nitrogen fixing bacteria _____________.

Azotobacter
Rhizobium
Glomus
Ideonella sakaiensis

Plants used for bio-diesel production _________

Anabaena
Jatropha
Pongamia
b and c

Asper$illus niger helps to produce ___________.

Citric acid
Acetic acid
Turmeric acid
Lactic acid

World Biofuel day is observed on ___________.

l0^th September
22^nd April
l0^th August
l7^th October

Part - B

Generic 2 - Answer All Question

What is the significance of world biofuel day?

Why were Chain and Florey awarded Nobel Prize?

How is milk converted into curd? Explain the process of curd formation

Give examples of two antibiotics and their mode of action.

What is antibiosis?
What are antibiotics?

Part - C

Generic 3 - Answer All Question

What will happen if penicillin is administered to a person without checking for sensitivity?

Name two fungi involved in bioremediation of plastics.

What is biogas?
What is Cyclosporin A?

Justify the role of microbes as a bio-fertilizer

UV is an ideal disinfectant for waste water. Give Reason.

Part - D

Generic 5 - Answer All Question

Explain the process of sewage treatment.

What is the key difference between primary and secondary sewage treatment?
List the advantages of biogas plants in rural areas.

Write short notes on the following.
a) Brewer's yeast
b) Ideonella sakaiensis
c) Microbial fuel cells

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