Environmental Biotechnology MCQ Questions & Answers

81

According to US water standards, the maximum permissible coliform count (number/100 ml) in recreational waters is

A) 10, 000 B) 5,000 C) 1,000 D) 500

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Answer & Solution

Answer: Option D

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82

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

A) Septic tank B) Activated sludge process C) Percolating filter system D) All of the above

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Answer & Solution

Answer: Option B

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83

Which one is exhaustible but renewable natural source?

A) Fossil B) Petroleum product C) Forest D) Coal

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Answer & Solution

Answer: Option C

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84

General circulation model (GCM's) are used to

A) Predict climate B) Predict cyclones C) Study ocean currents D) Study temperature on wind

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Answer & Solution

Answer: Option D

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85

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

A) Trans - Atlantic volcanic zone B) Circum - Pacific Ring of fire C) Central - Pacific Inter - Continental zone D) Indian - Ocean volcanic belt

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Answer & Solution

Answer: Option B

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86

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

A) 200 - 205 nm B) 220 - 225 nm C) 260 - 265 nm D) 295 - 300 nm

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Answer & Solution

Answer: Option A

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87

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

A) Probiotics B) Xenobiotic C) Epibiotic D) Antibiotic

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Answer & Solution

Answer: Option B

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88

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

A) For a given protein sequence, mutations accumulate at a constant rate in all lineages B) For a given protein sequence, mutation rates are different in different lineages C) All proteins evolve at the same constant rate D) For a given linage, mutation rates are the same for all proteins

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Answer & Solution

Answer: Option A

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89

The orchid seeds do not germinate under ordinary conditions because

A) Orchid seeds are too large for disposal B) Orchid seeds do not have endosperm C) Orchid seeds undergo a dormancy period D) They germinate under very dry conditions

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Answer & Solution

Answer: Option D

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90

Genes for biodegradation of xenobiotics by Pseudomonas are located on

A) Plasmids B) Genome C) Trascriptome D) Proteome

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Answer & Solution

Answer: Option A

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Environmental Biotechnology MCQ Questions & Answers | Biotechnology