Free Biodiversity and Variety of Life MCQs with Answers

371. In Charles Chamberland's experiment one of the following represented filterable viruses:

• A. Bacteria
• B. Rabies virus
• C. TMV
• D. HIV

Explanation: Answer is "Rabies virus"Explanation: Those days word virus was generally used for any poisonous fluid which caused any disease or death. That is why Chamberland used the term filterable viruses for rabies causing agents as they passed through the filter.

372. The virus that was first ever obtained in purified form was:

• A. TMV
• B. Pox virus
• C. Rabies virus
• D. Polio virus

Explanation: Answer is "TMV"Explanation: TMV was crystallized by W. M Stanley.

373. The size of the largest virus is:

• A. 250 nm
• B. 20 nm
• C. 150 nm
• D. 200 nm

Explanation: Answer is "200nm"Explanation: Pox virus is the largest virus with 200 nm size.

374. The transmittable nature of TMV was first observed by:

• A. W.M Stanley
• B. Ivanowsky
• C. Chamberland
• D. Twort

Explanation: Answer is "Ivanowsky"Explanation: Ivanowsky took bacteria free extract from infected tobacco leaves and sprinkled it over healthy plants which suffered from TMV later on.

375. The protein subunits that make the protein coat of viruses are called:

• A. Capsids
• B. Capsomeres
• C. Monomers
• D. Amino acids

Explanation: Answer is "Capsomeres"Explanation: Capsomeres are those protein subunits whereas capsid is entire protein coat.

376. The capsid of herpes virus and that of adenovirus differ from each other concerning:

• A. Chemical nature
• B. Type of subunits
• C. Number of subunits
• D. Role in the life cycle

Explanation: Answer is "Number of subunits"Explanation: Herpes virus have 162 capsomeres, whereas adenovirus have 252 capsomeres. Net difference is that of 90 capsomeres.

377. How many additional capsomeres are found in adenovirus, as compared to those in herpes virus:

• A. 70
• B. 80
• C. 90
• D. 100

Explanation: Answer is "90"Explanation: Herpes virus have 162 capsomeres, whereas adenovirus have 252 capsomeres. Net difference is that of 90 capsomeres

378. Which one of the following characters does not belong to fungi?

• A. Absorptive heterotrophic mode
• B. Eukaryotic organization
• C. Centrioles present
• D. Nuclear mitosis

Explanation: Answer is "Centriole present"Explanation: Fungi like plants lack centrioles.

379. The body of a fungus is called:

• A. Hypha
• B. Mycelium
• C. Fruiting body
• D. Coenocyte

Explanation: Answer is "Mycelium"Explanation: The body of fungus, called mycelium, consists of long, slender, branched tubular thread like filaments called the hyphae.

380. Non-hyphal unicellular fungi are called:

• A. Yeast
• B. Mushrooms
• C. Toadstools
• D. Fruiting bodies

Explanation: Option a) Yeast: Correct! Non-hyphal unicellular fungi are called yeast. Option b) Mushrooms: Mushrooms are macroscopic fruiting bodies, not non-hyphal unicellular fungi. Option c) Toadstools: Toadstools are also macroscopic fruiting bodies, not non-hyphal unicellular fungi. Option d) Fruiting bodies: "Fruiting bodies" is a general term for reproductive structures of fungi, not non-hyphal unicellular fungi. Answer is "Yeast"Explanation: Yeast are non-hyphal unicellular fungi.