Question

Match column-I with column-II and choose the right option.

Column-I	Column-II
A.	Statins	I.	Yeast
B.	Ethanol	II.	Blood-cholesterol lowering agent
C.	Dung	III.	Insect-resistant plant
D.	Bt-cotton	IV.	Biogas

A. A-II; B-I; C-IV; D-III
B. A-III; B-IV; C-I; D-II
C. A-I; B-II; C-III; D-IV
D). A-IV; B-II; C-I; D-III

Answer 1

Hint: Statins is also called HMG-CoA reductase inhibitors. Ethanol is a renewable fuel made from corn and other vegetable materials. Ethanol is liquid alcohol. This can be used like gasoline in vehicles with internal combustion engines. Biogas mainly consists of hydrocarbon which is combustible and can generate heat and energy once burnt. Bt crops are transgenic crops that are genetically modified from the DNA of the bacterium Bacillus thuringiensis.


Complete step-by-step answer:
Statins are a group of medicines that can lower the level of low-density lipoprotein (LDL) cholesterol in the blood. LDL cholesterol is often known as "bad cholesterol", and statins decrease the production of it inside the liver. Statins are a class of drugs often prescribed by doctors to help lower cholesterol levels in the blood. By decreasing levels, they help to prevent stroke and heart attacks.
Single-celled microorganisms known as yeast are added to the slurry. Fermentation is the biochemical process that takes place when yeast breaks down glucose. Yeast gets energy from glucose. Consequently, ethanol is produced.
Biogas is combustible gas made from the digestion of organic matter like kitchen waste, cow dung, and industrial effluent. The technology includes channelling the raw material into a manure digester, which converts some of it into methane. Most farmers engage in biogas production from cow dung although pig and chicken waste are viable options.
Bt cotton is a genetically modified pest-resistant plant cotton variety, which produces an insecticide to combat bollworms. The Bt cotton variety is genetically transformed with the Bt gene to protect the plants from bollworms, the most important pest of cotton. The worms found on the leaves of Bt cotton become lethargic and sleepy and thus, cause less harm to the plants. When the worms feed on the plant, the toxic proteins generated by crops are ingested, thus, killing them.

Column-I	Column-II
A.	Statins	II.	Blood-cholesterol lowering agent
B.	Ethanol	I.	Yeast
C.	Dung	IV.	Biogas
D.	Bt-cotton	III.	Insect-resistant plant

Therefore the correct answer is Option A.
Note: Statins help millions of humans get their high cholesterol under control. Most people can take statins without bad side effects and generic, lower-cost versions of the medicines are available. Ethanol is called first-generation biofuel. This kind of fuel is produced from sources like sugars, starches, and vegetable oils. It is produced commercially by decomposing wheat and corn. Biogas is produced by a biochemical process where certain kinds of bacteria convert the biological wastes into useful biogas. Since the useful gas originates from the biological process, it was termed biogas. Methane gas is the main component of biogas. Bt Crops are transgenic crops that produce a similar toxin as the bacterium Bacillus thuringiensis in the plant cell, thus, protecting the crops from pests. The bacterium secretes specific proteins called “cry proteins” that are toxic to insects. A few of the Bt crops include brinjal, cotton, corn, etc.