NEET Biology Biological Classification MCQs Set 07

Biology Objective Questions and Answers: Biological Classification

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Multiple Choice Questions

Question 1: The DNA of E.coli is
(a) Double stranded and linear
(b) Double stranded and circular
(c) Single stranded and linear
(d) Single stranded and circular
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Answer: (b) Double stranded and circular

Explanation:
1. DNA of E.coli. – Double stranded and circular.

Question 2: Photosynthetic bacteria have pigments in
(a) Chromoplasts
(b) Chromatophores
(c) Leucoplasts
(d) Chloroplasts
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Answer: (b) Chromatophores

Explanation:
1. Photosynthetic bacteria have pigments in chromatophores.

Question 3: What is true for Archaebacteria?
(a) All are halophiles
(b) All are photosynthetic
(c) All are fossils
(d) Oldest living beings
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Answer: (d) Oldest living beings

Explanation:
1. Archaebacteria is oldest living beings.

Question 4: Organisms which obtain energy by the oxidation of reduced inorganic compounds are called
(a) Photoautotrophs
(b) Chemoautotrophs
(c) Saprozoic
(d) Coproheterotrophs
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Answer: (b) Chemoautotrophs

Explanation:
1. Chemoautotrophs – Energy source is from oxidation of reduced inorganic compounds.

Question 5: Which statement is correct for bacterial transduction?
(a) Transfer of some genes from one bacteria to another bacteria through virus
(b) Transfer of genes from one bacteria to another bacteria by establishing contact
(c) Bacteria obtained its DNA directly from mother cell
(d) Bacteria obtained DNA from other external source
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Answer: (a) Transfer of some genes from one bacteria to another bacteria through virus

Explanation:
1. Bacterial transduction – Transfer of some genes from one bacterium to another bacterium through virus.

Question 6: Chromosomes in a bacterial cell can be 1 in number and
(a) Are always circular with more G ≡ C content
(b) Are always linear with more G ≡ C content
(c) Can be either circular or linear, but never both within the same cell
(d) Can be circular as well as linear within the same cell
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Answer: (a) Are always circular with more G ≡ C content

Explanation:
1. Bacteria . Can be one chromosome . Except Mycoplasma bacterial DNA is circular.

Question 7: Viruses that infect bacteria and cause their lysis, are called
(a) Lysozymes
(b) Lipolytic
(c) Lytic
(d) Lysogenic
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Answer: (c) Lytic

Explanation:
1. Bacteriophage causes lysis of bacteria – Lytic bacteriophage.

Question 8: The most thoroughly studied bacteria plant interactions is the
(a) Cyanobacterial symbiosis with some aquatic ferns
(b) Gall formation on certain angiosperms by Agrobacterium
(c) Nodulation of Sesbania stems by nitrogen fixing bacteria
(d) Plant growth stimulation by phosphate-solubilising bacteria
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Answer: (b) Gall formation on certain angiosperms by Agrobacterium

Explanation:
1. Gall formation on certain angiosperms by Agrobacterium is thoroughly studied.

Question 9: What is true for photolithotrops?
(a) Obtain energy from radiations and hydrogen from organic compounds
(b) Obtain energy from radiations and hydrogen from inorganic compounds
(c) Obtain energy from organic compounds
(d) Obtain energy from inorganic compounds
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Answer: (b) Obtain energy from radiations and hydrogen from inorganic compounds

Explanation:
1. Photolithotrophs Energy from – Radiations Hydrogen from – Inorganic compounds.

Question 10: Which of the following organism possesses characteristics of a plant and an animal?
(a) Euglena
(b) Paramoecium
(c) Bacteria
(d) Mycoplasma
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Answer: (a) Euglena

Explanation:
1. Euglena possesses characteristics of plant and animal.

Question 11: Which one of the following is true for fungi?
(a) They are phagotrophs
(b) They lack a rigid cell wall
(c) They are heterotrophs
(d) They lack nuclear membrane
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Answer: (c) They are heterotrophs

Explanation:
1. Fungi are heterotrophic.

Question 12: Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
(a) Black rust of wheat
(b) Bacterial leaf blight of rice
(c) Downy mildew of grapes
(d) Loose smut of wheat
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Answer: (c) Downy mildew of grapes

Explanation:
1. Bordeaux mixture – Fungicide – Discovered by R.M.A. Millardet – Control of Downy mildew.

Question 13: The black rust of wheat is a fungal disease caused by
(a) Albugo candida
(b) Puccinia graminis tritici
(c) Ustilago nuda
(d) Cleviceps purpurea
Show Answer & Explanation

Answer: (b) Puccinia graminis tritici

Explanation:
1. Black rust of wheat White rust in crucifer . Puccinia graminis tritici . Albugo candida or Cystopus candidus – Ergot of rye – Loose smut . Clavicep purpurea . Ustilago nuda.

Question 14: The smut of maize is caused by
(a) Ustilago avenae
(b) Ustilago nuda
(c) Ustilago hordei
(d) Ustilago maydis
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Answer: (d) Ustilago maydis

Explanation:
1. Smut of maize – Ustilago maydis.

Question 15: Columella is a specialized structure found in the sporangium of
(a) Spirogyra
(b) Ulothrix
(c) Rhizopus
(d) Penicillium
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Answer: (c) Rhizopus

Explanation:
1. Sporangiospore – Collumella present e.g., Rhizopus Mucor Dung mould.

Question 16: Dikaryotisation occurs in Puccinia on
(a) Upper surface of Barberry leaf
(b) Lower surface of Barberry leaf
(c) Upper surface of wheat leaf
(d) Lower surface of wheat leaf
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Answer: (a) Upper surface of Barberry leaf

Explanation:
1. Dikaryotisation in Puccinia – Upper surface of Barbery leaf.

Question 17: Adhesive pad of fungi penetrate the host with the help of
(a) Mechanical pressure and enzymes
(b) Hooks and suckers
(c) Softening by enzymes only
(d) Only by mechanical pressure
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Answer: (a) Mechanical pressure and enzymes

Explanation:
1. Adhesive pad of fungi penetrate in the host with the help of – Mechanical pressure and enzymes.

Question 18: Which fungal disease spreads by seed and flowers?
(a) Loose smut of wheat
(b) Corn smut
(c) Covered smut of barley
(d) Soft rot of potato
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Answer: (a) Loose smut of wheat

Explanation:
1. Fungal disease spreads by seed and flowers – Loose smut of wheat.

Question 19: Mycorrhiza exhibits the phenomenon of
(a) Parasitism
(b) Symbiosis
(c) Antagonism
(d) Endemism
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Answer: (b) Symbiosis

Explanation:
1. Mycorrhiza – Symbiotic relation.

Question 20: VAM is an example of
(a) Endomycorrhiza
(b) Ectoparasitism
(c) Endoparasitism
(d) Ectomycorrhiza
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Answer: (a) Endomycorrhiza

Explanation:
1. VAM – Endomycorrhiza e.g., Glomus.

Question 21: An example of endomycorrhiza is
(a) Nostoc
(b) Glomus
(c) Agaricus
(d) Rhizobium
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Answer: (b) Glomus

Explanation:
1. Endomycorrhiza e.g., Glomus → Orchids.

Question 22: Satellite RNAs are present in some
(a) Plant viruses
(b) Viroids
(c) Prions
(d) Bacteriophages
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Answer: (a) Plant viruses

Explanation:
1. Satellite RNAs.

Question 23: The tailed bacteriophages are
(a) Motile on surface of bacteria
(b) Non-motile
(c) Motile on surface of plant leaves
(d) Actively motile in water
Show Answer & Explanation

Answer: (b) Non-motile

Explanation:
1. The tailed bacteriophages – Non-motile.

Free study material for Biology

Biological Classification Objective Questions & Solutions for NEET Biology

Download Multiple Choice Questions: Biological Classification (NEET Biology)

Test your conceptual understanding of Biological Classification with these targeted multiple-choice questions. Designed in alignment with the latest NEET curriculum for NEET Biology, these problem sets build accuracy and prepare students for objective exams.

Concept Clarification for Biological Classification

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FAQs

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