Biology 1 Marks Question

Name any two species of fungus, which are used in the production of the antibiotics.

In which way have microbes played a major role in controlling diseases caused by harmful bacteria?

Mention the role of cyanobacteria as a biofertiliser.

Mention the information that the health workers derive by measuring BOD of a water body.

Which one of the following is the baker’s yeast used in fermentation?Saccharum barberi Saccharomyces cerevisiae Sonalika.

Write the scientific name of the microbe used for fermenting malted cereals and fruit juices.

Name the group of organisms and the substrate they act on to produce biogas.

Name the gas released and the process responsible for puffing up of the bread dough when Saccharomyces cerevisiae is added to it.

Give any two microbes that are useful in biotechnology.

Write the constituents of biogas.

Who discovered the first antibiotic? Name the antibiotic.

Why do we prefer to call secondary waste water treatment as biological treatment?

Mark the odd one in the following groups.
Whisky, Wine, Brandy, Rum.

Name the pests that Ladybird, beetle and Dragonflies help to get rid of.

Mark the odd one in the following groups.
Clostridium, Lactobacillus, Aspergillus, Acetobacter.

Name the fungus used in organ transplant. Write the product of this organism and explain its specific use.

How do statins reduce the blood cholesterol level?

Name the first antibiotic discovered and by whom?

Write names of some diseases which can be cured by antibiotics.

Why is sewage water treated until the BOD is reduced? Give a reason.

Differentiate between primary sludge and activated sludge.

Name two free-living nitrogen fixing microbes.

What makes the Nucleopolyhedrovirus a desirable biological control agent?
OR
What is the significance of Nucleopolyhedrovirus in pest management?

What is toddy?

Mark the odd one in the following groups.
Anabaena, Streptococcus, Nostoc, Oscillatoria.

What function do methanogens perform in the rumen of cattle?

What are baculoviruses?

Name any genetically modified crop.

Bottled fruit juices are clearer as compared to those at home. Explain.

Which species of Penicillium produces Roquefort cheese?

What makes the Nucleopolyhedrovirus a desirable biological control agent?

When was Ganga Action Plan started?

What is meant by biocontrol?

1. How do ladybird beetles and dragon flies act as biocontrol agents?
2. Mention the constituents of 'flocs'.

Why is distillation required for producing certain alcoholic drinks?

Name any one symbiont which serves as a biofertiliser. Mention its specific role.

Give an example of a rod-shaped virus.

What would have happened if antibiotics were not discovered?

Name a beetle that is used to get rid of aphids.

Name the physical processes employed in the primary treatment of sewage.

Who won the Nobel Prize for the discovery of penicillin?

What are biofertilisers?

Name a yeast used in beverages as well as bread making.

Give one reason for adding blue-green algae to the agricultural field.

Name the scientists who were awarded the Nobel Prize for discovering the potential of Penicillium.

Name the kind of cheese, which possesses characteristic holes.

Name the states involved in Ganga action plan.

Blue-green algae are not yet popular as biofertiliser. Give reason.

What are flocs?

Explain the consequence if the oxygen availability to activated sludge flocs is reduced.

Expand the term STP.

Who gave the term antibiotic?

Name an immune immunosupressive agent?

Which one of the following is the baker's yeast used in fermentation? Saccharum barberi, Saccharomyces cereviseae, Sonalika.

Give the significance of biofertilisers.

What is the source organism for ECORI, restriction endonuclease?

Name any two industrially important enzymes.

Name an example of a rod-shaped virus.

What are Nucleopoly hedroviruses being used for nowadays?

Name the organic acid produced by the bacterium, Clostridium butylicum.

Who won the Nobel Prize for the discovery of Penicillin?

Name two microbes that are useful in biotechnology experiments.

Define BOD.

Who developed the technology of biogas production in India?

Name a bioactive molecule used as immuno suppressive agent in organ-transplantation.

What is the group of bacteria found in both the rumen of cattle and shidge of sewage treatment?

Name the process, the microbes carry out during sewage treatment.

An antibiotic called wonder drug was used to treat the wounded soldiers of America during World War II. Name the drug and scientist, who discovered it.

Name the two vitamins produced by microbial fermentation.

Name the microbes that help production of the following products commercially:
Butyric acid.

The excreta of cattle do not contain any cellulose but human excreta may contain cellulose. Why?

What is the difference in production of wine and whisky?

Mention one commercial use of lipase.

Why are blue green algae not popular as biofertilisers?

Why is cow dung used in the generation of biogas?

Give an example of a rod shaped virus.

Name the microbes that help production of the following products commercially:
Citric acid.

Name a microbe used for the production of Swiss cheese.

Name the first organic acid produced by microbial fermentation.

Mark the odd one in the following groups.
Dragonflies, Trichoderma, Baculoviruses, Streptococcus.

Name the gas released and the process responsible for puffing up of the bread dough when Saccharomyces cereviseae is added to it.
OR
Name the metabolic pathway associated with the rising of dough in making bread. What makes the dough rise?

Name the bacterium that was used as biopesticide for the first time.

What are the harmful effects of chemical pesticides?

Why do we add an inoculum of curd to milk for curdling it?
OR
Why is 'starter' added to set the milk into curd? Explain.

OR
During the production of curd, a small amount of curd is added as a starter to the fresh milk at a suitable temperature. Explain the changes the milk undergoes when it sets into the curd.

OR
Why is a little curd added to milk to set it into curd? Explain.

Name the nutrient that gets enhanced while curdling of milk by Lactobacillus.

Why bottled fruit juices appear clearer?

What are prions?

Name a bacteria that is used in the form of sprays or sachets to control butterfly caterpillars.

Name the antibiotic used extensively to treat the soldiers wounded in world war II.

Following are the names of some microbes. Aspergillus niger, Clostridium butylicum and Lactobacillus.
Write the most important characteristic they share.

Name a species of virus used in biological control.

Why cannot the sewage be let into natural water bodies directly?
OR
Why is sewage treated in STPs before discharge into a natural water body?