Environmental Biotechnology MCQs

Question 1

A simple and relatively inexpensive film-flow type of aerobic treatment method is

Accepted Answer

Activated sludge process

Answer

Septic tank

Answer

Percolating filter system

Answer

All of the above

Question 2

Which one is exhaustible but renewable natural source?

Accepted Answer

Forest

Answer

Fossil

Answer

Petroleum product

Answer

Coal

Question 3

General circulation model (GCM's) are used to

Accepted Answer

Study temperature on wind

Answer

Predict climate

Answer

Predict cyclones

Answer

Study ocean currents

Question 4

At the present time volcanoes are confined to certain limited areas of the Earth's surface. This special zone is called

Accepted Answer

Circum - Pacific Ring of fire

Answer

Trans - Atlantic volcanic zone

Answer

Central - Pacific Inter - Continental zone

Answer

Indian - Ocean volcanic belt

Question 5

A small reduction in ozone concentration can lead to a large increase in the amount of harmful ultraviolet radiations reaching the earth in the wavelength region of

Accepted Answer

200 - 205 nm

Answer

220 - 225 nm

Answer

260 - 265 nm

Answer

295 - 300 nm

Question 6

A synthetic chemical compound that is not naturally available in nature is

Accepted Answer

Xenobiotic

Answer

Probiotics

Answer

Epibiotic

Answer

Antibiotic

Question 7

Which one of the following is a valid assumption regarding the molecular clock hypothesis in evolution?

Accepted Answer

For a given protein sequence, mutations accumulate at a constant rate in all lineages

Answer

For a given protein sequence, mutation rates are different in different lineages

Answer

All proteins evolve at the same constant rate

Answer

For a given linage, mutation rates are the same for all proteins

Question 8

The orchid seeds do not germinate under ordinary conditions because

Accepted Answer

They germinate under very dry conditions

Answer

Orchid seeds are too large for disposal

Answer

Orchid seeds do not have endosperm

Answer

Orchid seeds undergo a dormancy period

Question 9

Genes for biodegradation of xenobiotics by Pseudomonas are located on

Accepted Answer

Plasmids

Answer

Genome

Answer

Trascriptome

Answer

Proteome