NEET Biology Biological Classification MCQs Set 11

Biology Objective Questions and Answers: Biological Classification

Explore reliable objective questions for Biological Classification tailored for NEET learners. Utilizing these Biology multiple-choice formats ensures thorough preparation and strengthens problem-solving speed for upcoming school assessments.

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Multiple Choice Questions

Question 1: Archaebacteria differ from other bacteria in:
(a) Nucleoid
(b) Composition of cell wall
(c) Composition of cytoplasm
(d) Composition of genetic material
Show Answer & Explanation

Answer: (b) Composition of cell wall

Explanation:
1. Archaebacteria have a distinctive cell wall without the usual peptidoglycan.

Teacher's Note:
1. Methanogens, halophiles and thermoacidophiles are archaebacteria.

Question 2: Which group of organisms produces biogas from the dung of cattle?
(a) Methanomonas
(b) Methanogens
(c) Cyanobacteria
(d) Mycoplasma
Show Answer & Explanation

Answer: (b) Methanogens

Explanation:
1. Methanogens are archaebacteria living in the guts of ruminants and in dung, and they produce methane.

Teacher's Note:
1. Methanogens are strict anaerobes.

Question 3: Choose the correct statement:
(a) Most bacteria are autotrophs
(b) All bacteria are heterotrophs
(c) Some bacteria are heterotrophs
(d) Most bacteria are heterotrophs
Show Answer & Explanation

Answer: (d) Most bacteria are heterotrophs

Explanation:
1. The vast majority of bacteria are heterotrophs; only a few are autotrophs.

Teacher's Note:
1. Do not choose option 3, which understates the majority.

Question 4: Nostoc fixes atmospheric nitrogen in specialised cells called:
(a) Harmocyst
(b) Harmogonium
(c) Heterocyst
(d) Akinete
Show Answer & Explanation

Answer: (c) Heterocyst

Explanation:
1. Filamentous cyanobacteria such as Nostoc and Anabaena fix nitrogen in thick-walled heterocysts.

Teacher's Note:
1. Akinetes are resting spores.

Question 5: Choose the correct set of bacterial diseases:
(a) Mumps, cholera, dengue
(b) Chicken pox, typhoid, mumps
(c) Mumps, tetanus, chicken pox
(d) Cholera, typhoid, tetanus
Show Answer & Explanation

Answer: (d) Cholera, typhoid, tetanus

Explanation:
1. Cholera, typhoid and tetanus are bacterial
2. Mumps, dengue and chicken pox are viral.

Teacher's Note:
1. Link each disease with its pathogen group.

Question 6: According to the five kingdom system, kingdom Protista includes:
(a) Dinoflagellates, diatoms, euglenoids, slime moulds, bacteria
(b) Euglenoids, fungi, slime moulds, dinoflagellates, protozoans
(c) Slime moulds, protozoans, dinoflagellates, diatoms, euglenoids
(d) Protozoans, moss, euglenoids, slime moulds, diatoms
Show Answer & Explanation

Answer: (c) Slime moulds, protozoans, dinoflagellates, diatoms, euglenoids

Explanation:
1. Protista includes chrysophytes (diatoms), dinoflagellates, euglenoids, slime moulds and protozoans
2. Bacteria, fungi and moss belong elsewhere.

Teacher's Note:
1. Eliminate options that contain bacteria, fungi or moss.

Question 7: The cell walls of diatoms are embedded with:
(a) Calcium oxalate crystals
(b) Silica
(c) Iron
(d) Calcium carbonate crystals
Show Answer & Explanation

Answer: (b) Silica

Explanation:
1. Diatom cell walls are siliceous and indestructible, forming diatomaceous earth.

Teacher's Note:
1. Diatomaceous earth is used in polishing and filtration.

Question 8: Which are the chief producers in the oceans?
(a) Diatoms
(b) Dinoflagellates
(c) Euglenoids
(d) Green algae
Show Answer & Explanation

Answer: (a) Diatoms

Explanation:
1. Diatoms are the chief producers of the oceans.

Teacher's Note:
1. Chrysophytes (diatoms) form a major part of marine phytoplankton.

Question 9: Which organism makes the sea appear red by rapid multiplication (red tides)?
(a) Euglena
(b) Noctiluca
(c) Gonyaulax
(d) Trypanosoma
Show Answer & Explanation

Answer: (c) Gonyaulax

Explanation:
1. Red dinoflagellates such as Gonyaulax multiply rapidly and give a red colour to the sea.

Teacher's Note:
1. Their toxins can kill fishes.

Question 10: Euglenoids have a protein-rich layer instead of a cell wall. This layer is called:
(a) Epidermis
(b) Skin
(c) Pellicle
(d) Middle lamella
Show Answer & Explanation

Answer: (c) Pellicle

Explanation:
1. The flexible protein-rich layer of euglenoids is the pellicle.

Teacher's Note:
1. The pellicle makes the body flexible.

Question 11: The cell wall of fungi is composed of:
(a) Chitin and cellulose
(b) Cellulose and polysaccharides
(c) Chitin and polysaccharides
(d) Chitin, polysaccharides and glycogen
Show Answer & Explanation

Answer: (c) Chitin and polysaccharides

Explanation:
1. Fungal walls are made of chitin and other polysaccharides.

Teacher's Note:
1. Plant walls are cellulose; fungal walls are chitin.

Question 12: Which organisms are used to make bread and beer?
(a) Rhizopus
(b) Yeast
(c) Albugo
(d) Neurospora
Show Answer & Explanation

Answer: (b) Yeast

Explanation:
1. Baker's yeast (Saccharomyces) ferments sugar to give CO2 for bread and alcohol for beer.

Teacher's Note:
1. Yeast is a unicellular ascomycete.

Question 13: In fungi, hyphae that are continuous tubes filled with multinucleated cytoplasm are called:
(a) Unicellular hyphae
(b) Coenocytic hyphae
(c) Multicellular hyphae
(d) Both 1 and 3
Show Answer & Explanation

Answer: (b) Coenocytic hyphae

Explanation:
1. Aseptate hyphae with many nuclei in common cytoplasm are coenocytic.

Teacher's Note:
1. Septate hyphae have cross walls.

Question 14: The mycelium of members of Phycomycetes is:
(a) Septate and coenocytic
(b) Aseptate and coenocytic
(c) Septate and multicellular
(d) Septate and unicellular
Show Answer & Explanation

Answer: (b) Aseptate and coenocytic

Explanation:
1. Phycomycetes have aseptate, coenocytic mycelium.

Teacher's Note:
1. Higher fungi have septate mycelium.

Question 15: Which is NOT a member of Phycomycetes?
(a) Albugo
(b) Aspergillus
(c) Rhizopus
(d) Mucor
Show Answer & Explanation

Answer: (b) Aspergillus

Explanation:
1. Aspergillus is an ascomycete with septate mycelium.

Teacher's Note:
1. Albugo, Rhizopus and Mucor are phycomycetes.

Question 16: Which fungus is used extensively in biochemical and genetic work?
(a) Agaricus
(b) Aspergillus
(c) Claviceps
(d) Neurospora
Show Answer & Explanation

Answer: (d) Neurospora

Explanation:
1. Neurospora, a pink bread mould, has been used extensively in biochemical and genetic work.

Teacher's Note:
1. Beadle and Tatum used Neurospora for the one gene one enzyme hypothesis.

Question 17: Choose the INCORRECT statement about Ascomycetes:
(a) Mycelium is branched and septate
(b) Sexual spores are produced endogenously
(c) Karyogamy occurs in sac-like asci
(d) Reduction division occurs in fruiting bodies and forms conidia
Show Answer & Explanation

Answer: (d) Reduction division occurs in fruiting bodies and forms conidia

Explanation:
1. Conidia are asexual spores formed exogenously by mitosis
2. Meiosis occurs in the ascus and gives ascospores.

Teacher's Note:
1. Ascospores are endogenous, conidia are exogenous.

Question 18: Which pair of diseases is caused by members of Basidiomycetes?
(a) Rust and smut
(b) Ergot and smut
(c) Ergot and rust
(d) Powdery mildew and rust
Show Answer & Explanation

Answer: (a) Rust and smut

Explanation:
1. Rusts (Puccinia) and smuts (Ustilago) are basidiomycetes
2. Ergot (Claviceps) and powdery mildew are ascomycetes.

Teacher's Note:
1. Match each disease with its fungal class.

Question 19: Fungi imperfecti are also called:
(a) Members of Phycomycetes
(b) Members of Ascomycetes
(c) Members of Basidiomycetes
(d) Members of Deuteromycetes
Show Answer & Explanation

Answer: (d) Members of Deuteromycetes

Explanation:
1. Fungi whose sexual stage is not known are placed in Deuteromycetes (fungi imperfecti).

Teacher's Note:
1. Alternaria, Colletotrichum and Trichoderma are examples.

Question 20: Select the FALSE statement:
(a) Lichens are symbiotic associations of algae and fungi
(b) Viruses are smaller than bacteria
(c) Viruses are obligate parasites
(d) Viruses are facultative parasites
Show Answer & Explanation

Answer: (d) Viruses are facultative parasites

Explanation:
1. Viruses can multiply only inside a host cell, so they are obligate parasites, not facultative.

Teacher's Note:
1. Obligate means they cannot live independently.

Question 21: Which statement about bacteriophages is true?
(a) They are generally single-stranded RNA viruses
(b) They are generally double-stranded DNA viruses
(c) They are generally single-stranded DNA viruses
(d) They are generally double-stranded RNA viruses
Show Answer & Explanation

Answer: (b) They are generally double-stranded DNA viruses

Explanation:
1. Most bacteriophages, such as T4, contain double-stranded DNA.

Teacher's Note:
1. Plant viruses mostly have single-stranded RNA.

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Practice MCQs for NEET Biology Biological Classification

NEET Biology Biological Classification Objective Test Questions

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FAQs

Where can I access latest NEET Biology Biological Classification MCQs Set 11?

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Yes, our NEET Biology Biological Classification MCQs Set 11 include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the NEET paper is now competency-based.

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