Free Biodiversity and Variety of Life MCQs with Answers

351. Give an example of edible fungi:

• A. Agaricus sp.
• B. Tuber sp.
• C. Morchella esculenta
• D. Agaricus sp., Morchella esculenta and Tuber sp.

Explanation: Answer is "Agaricus sp., Morchella esculenta and Tuber sp."Explanation: All of them are edible.

352. Give an example of poisonous mushrooms:

• A. Death cap/death angel
• B. Saccharomyces cerevisiae
• C. Jack - O Lantern
• D. Death cap/death angel and Jack - O Lantern

Explanation: Answer is "Death cap / death angel and Jack O Lantern"Explanation: These are poisonous fungi having strong neurotoxins.

353. Some species of _ are used for producing soya sauce and soya paste from soya beans.

• A. Penicillium
• B. Aspergillus
• C. Yeast
• D. Neurospora

Explanation: Answer is "Aspergillus"Explanation: It produces some highly proteolytic enzymes which breakdown the grain proteins

354. Penicillin is dominated from:

• A. Saccharomyces cerevisiae
• B. Penicillium griseofulvum
• C. Penicillium notatum
• D. Neurospora crassa

Explanation: Answer is "Penicillium notatum"Explanation: Historically it happened so.

355. It is used in organ transplantation to prevent transplant rejection:

• A. Lovastatin
• B. Cyclosporine
• C. Penicillium
• D. Griseofulvin

Explanation: Answer is "Cyclosporine"Explanation: It is an immunosupressent.

356. Lovastatin is used for:

• A. Lowering blood cholesterol
• B. Relief in migraine
• C. Preventing transplant rejection
• D. Inhibiting fungal growth

Explanation: Answer is "Lowering blood cholesterol"Explanation: It is an inhibitor of that enzyme which is associated with cholesterol anabolism.

357. Griseofulvin is used for:

• A. Lowering blood cholesterol
• B. Relief in migraine
• C. Preventing transplant rejection
• D. Inhibiting fungal growth

Explanation: Answer is "Inhibiting fungal growth"Explanation: It makes the cells resistant to fungal infections.

358. Massive quantities of antibiotics are being prepared and used, which are followed by the widespread problems of:

• A. Drug resistance in microorganisms
• B. Drug addiction in microorganisms
• C. Drug sensitivity in microorganisms
• D. Intoxication in human being

Explanation: Answer is "Drug resistance in microorganisms"Explanation: Widespread use of antibiotics and easy availability are causes of increased microbial resistance against antibiotics.

359. These are the first eukaryotes to be used by genetic engineers:

• A. Lichen
• B. Yeast
• C. Mycorrhizae
• D. Rhizopus

Explanation: Answer is "Yeast"Explanation: Various yeast species have been genetically engineered to produce various drugs; Saccharomyces cervisiae is a simple eukaryotic cell, serving as a model for all eukaryotes. It is easy to genetically engineer. Its physiology, metabolism and genetics are amendable for use in harsh industrial conditions. A wide variety of chemicals of different classes can be produced by engineered yeast, including phenolics, isoprenoids, alkaloids and polyketides. About 20% biopharmaceuticals are produced by Saccharomyces cervisiae, including insulin, vaccine for hepatitis and human serum albumin.

360. A functional artificial chromosome was made in:

• A. Aspergillus fumigatus
• B. Saccharomyces cerevisiae
• C. Penicillium notatum
• D. Penicillium griseofulvin

Explanation: Answer is "Saccharomyces cervisae"Explanation: Yeast artificial chromosomes (YACs) are genetically engineered chromosomes derived from the DNA of the yeast Saccharomyces cervisae, which is then ligated into a bacterial plasmid.