Free Biodiversity and Variety of Life MCQs with Answers

• A. Plasma membrane
• B. Nucleus
• C. Ribosomes
• D. Cell wall

Explanation: Plasma membrane of eubacteria resembles plasma membrane of eukaryotic cell.

• A. Paramecium caudatum
• B. Escherichia coli
• C. Euglena viridis
• D. Amoeba proteus

Explanation: 1. Paramecium caudatum: Paramecium caudatum is a eukaryotic organism. Eukaryotes are characterized by having a true nucleus enclosed…

• A. Taenia, a tapeworm
• B. Wuchereria, a filarial worm
• C. Rhizopus, a mold
• D. Ascaris, a round worm

Explanation: Rhizopus, a mold:Rhizopus is a genus of fungi, specifically a type of mold.

• A. Capsid
• B. Virion
• C. Nucleoprotein
• D. Core

Explanation: The nucleic acid of a virus is surrounded by a protein coat called the capsid.

• A. Protista
• B. Fungi
• C. Archaea
• D. Monera

Explanation: Protista is a kingdom in the classification of life forms. It consists of a diverse group of eukaryotic microorganisms that are primarily…

• A. Eubacteria and archaea
• B. Cyanobacteria and diatoms
• C. Protists and mosses
• D. Liverworts and yeasts

Explanation: Explanations for each of the given options:1. Eubacteria and Archaea: - Eubacteria and Archaea are two distinct domains of microorganisms.

• A. Beijernickia
• B. Rhodospirillum
• C. Rhizobium
• D. Azotobacter

Explanation: Rhodospirillum is a free living photosynthetic anaerobic nitrogen fixing nonsulphur bacteria.

• A. Tail fibres, Head, Sheath, Collar
• B. Sheath, Collar, Head, Tail fibres
• C. Head, Sheath, Collar, Tail fibres
• D. Collar, Tail fibres, Head, Sheath

Explanation: A-Head, B-Sheath, C-Collar, D-Tail fibre

• A. Alternaria solani
• B. Ustilago nuda
• C. Puccinia graminis triticina
• D. Xanthomonas oryzae

Explanation: Certainly, I can provide explanations for the options you listed in the context of black stem rust of wheat:1.

• A. Morphological features
• B. Chemical constituents
• C. Floral characters
• D. Evolutionary relationships

Explanation: Certainly, here's an explanation of each of the options you mentioned in the context of phylogenetic classification:1.

• A. Bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
• B. Bacteria that contain a cytoskeleton and ribosomes
• C. Archaebacteria that contain protein homologous to eukaryotic core histones
• D. Archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled.

Explanation: Thermococcus, Methanococcus and Methanobacterium are examples of archaebacteria which are characterized by a unique cell wall that lack…

• A. Physarum
• B. Thiobacillus
• C. Anabaena
• D. Rhizopus

Explanation: All options are explained below:a)Physarum is a genus of slime molds. Slime molds are unique organisms that belong to the group Amoebozoa.

• A. They are pleomorphic.
• B. They are sensitive to penicillin.
• C. They cause diseases in plants.
• D. They are also called PPLO.

Explanation: All options are explained below: a)They are pleomorphic: This statement is correct.

• A. Puffballs and Claviceps
• B. Peziza and stink horns.
• C. Morchella and mushrooms.
• D. Birds nest fungi and puffballs.

Explanation: All options are explained below: a)Puffballs and Claviceps:Puffballs belong to the Gasteromycetes group, and Claviceps is indeed a member…

• A. Fungi
• B. Bacteria
• C. Mycorrhiza
• D. Viruses

Explanation: The curing of tea leaves, also known as tea fermentation or oxidation, is a critical step in the post-harvest processing of tea leaves.

• A. B, C and F only
• B. A, C and E only
• C. A, D and E only
• D. B, D and E only

Explanation: The environmental conditions essential for the optimum growth of Mucor on a piece of bread typically include: A.

• A. Can induce root nodules on many plant species
• B. Can fix nitrogen in the freeliving state
• C. Cannot fix specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids
• D. Like Rhizobium, it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host's cortex.

Explanation: a)Can induce root nodules on many plant species: This statement is correct.

• A. methanophilic bacteria
• B. butyric acid bacteria
• C. Helicobactor pylori
• D. Streptococcus lactis

Explanation: The fermenting microbe used for retting jute is not methanophilic bacteria, Helicobacter pylori, or Streptococcus lactis.

• A. Provides protection, anchorage and absorption for the algae
• B. Provides food for the alga
• C. Fixes the atmospheric nitrogen for the alga
• D. Releases oxygen for the alga.

Explanation: In a lichen, the association between the alga and the fungus is a mutualistic one, where both partners benefit: The fungus provides…

• A. DNA is not present at any stage in the life cycle of retroviruses.
• B. Retroviruses carry gene for RNA dependent DNA polymerase.
• C. The genetic material in mature retroviruses is RNA.
• D. Retroviruses are causative agents for ertain kinds of cancer in man.

Explanation: a) "DNA is not present at any stage in the life cycle of retroviruses" - This statement is not true.