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NEET • BIOLOGY • BIOLOGICAL CLASSIFICATION

Biological classification practice · Easy

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1 Easy

1 of 70

Remembering +4 | -1

Plasmid is

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Correct option: D

Extrachromosomal DNA in bacterial cell

Option D (Extrachromosomal DNA in bacterial cell) is correct because a plasmid is a small, circular, extrachromosomal DNA molecule within a bacterial cell.

2 Easy

2 of 70

Remembering +4 | -1

Five kingdom classification was given by

View answer and explanation

Correct option: C

Whittaker

Option C (Whittaker) is correct because R.H. Whittaker proposed the five-kingdom classification system.

3 Easy

3 of 70

Remembering +4 | -1

Which of the following characters served as the criteria for five kingdom system of classification as used by Whittaker?

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Correct option: D

All of the above

Option D (All of the above) is correct because Whittaker's five-kingdom classification considered cell structure, body organization, mode of nutrition, reproduction, and phylogenetic relationships.

4 Easy

4 of 70

Remembering +4 | -1

Aristotle classified the plants on the basis of their morphological characters and categorised them into

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Correct option: A

Tree, shrubs and herbs

Option A (Tree, shrubs and herbs) is correct because Aristotle classified plants based on simple morphological characteristics into these three categories.

5 Easy

5 of 70

Remembering +4 | -1

Teichoic acid is present in

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Correct option: A

Cell wall of Gram positive bacteria

Option A (Cell wall of Gram positive bacteria) is correct because teichoic acid is a characteristic component of the cell wall of Gram-positive bacteria.

6 Easy

6 of 70

Understanding +4 | -1

Under favourable conditions slime moulds form

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Correct option: D

Fruiting bodies

The correct answer is B (Plasmodium) because under favorable conditions, slime molds aggregate to form a plasmodium, which is a multinucleate mass of protoplasm.

7 Easy

7 of 70

Remembering +4 | -1

Kingdom-Animalia includes

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Correct option: D

All of these

Option D (All of these) is correct because Kingdom Animalia includes heterotrophic, eukaryotic, and multicellular organisms.

8 Easy

8 of 70

Remembering +4 | -1

Single stranded nucleic acid is found in

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Correct option: B

ϕ ×174

Option B (ϕ ×174) is correct because bacteriophage ϕ ×174 has a single-stranded DNA genome, while the others have double-stranded DNA.

9 Easy

9 of 70

Remembering +4 | -1

Eubacteria have rigid cell wall made up of

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Correct option: B

Peptidoglycan

Option B (Peptidoglycan) is correct because eubacteria cell walls are primarily composed of peptidoglycan, also known as murein.

10 Easy

10 of 70

Understanding +4 | -1

Which of the following phenomenon proves that viruses are living?

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Correct option: C

They multiply in host cells

Option C (They multiply in host cells) is correct because replication is a key characteristic of living organisms, and viruses can only replicate within a host cell.

11 Easy

11 of 70

Understanding +4 | -1

In the five kingdom classification of Whittaker there is no mention of all of the following, except

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Correct option: C

Autotrophic prokaryotes

Option C (Autotrophic prokaryotes) is correct because Whittaker's classification includes Monera, which contains autotrophic prokaryotes.

12 Easy

12 of 70

Remembering +4 | -1

Which of the following organisms completely lack cell wall, they are the smallest living cells known and can survive without oxygen?

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Correct option: A

Mycoplasma

Option A (Mycoplasma) is correct because Mycoplasmas are known for lacking a cell wall, being the smallest living cells, and being able to survive without oxygen (anaerobic).

13 Easy

13 of 70

Remembering +4 | -1

Which of the following is a Gram negative bacterium?

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Correct option: A

Escherichia coli

Option A (Escherichia coli) is correct because Escherichia coli is a Gram-negative bacterium, characterized by its thin peptidoglycan layer and outer membrane.

14 Easy

14 of 70

Remembering +4 | -1

The protein coat of a virus/is known as

View answer and explanation

Correct option: B

Capsid

The protein coat of a virus is known as the capsid.

15 Easy

15 of 70

Remembering +4 | -1

Fungi imperfecti includes

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Correct option: B

Alternaria and Trichoderma

Option B is correct because Alternaria and Trichoderma are examples of fungi that belong to Deuteromycetes (Fungi Imperfecti), a group where sexual reproduction is not observed.

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16 Easy

16 of 70

Remembering +4 | -1

The replacement of two kingdom grouping by five kingdom classification was proposed in the year

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Correct option: D

1969

Option D (1969) is correct because R.H. Whittaker proposed the five-kingdom classification system in 1969.

17 Easy

17 of 70

Application +4 | -1

A bacterium divides after every 35 min, if a culture containing

{10^5}

cells per mL is grown, then cell concentration per mL after 175 min will be

View answer and explanation

Correct option: D

32 \times {10^5}

Option D (

32 \times {10^5}

) is correct because after 175 minutes (5 divisions), the initial cell concentration multiplies by

2^5 = 32

18 Easy

18 of 70

Remembering +4 | -1

Which of the following statements is correct with respect to Colletotrichum falcatum?

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Correct option: D

The mycelium is septate conidia, conidiophores and setae are aseptate

The correct answer is C because the conidia are aseptate, while the conidiophores, mycelium, and setae are septate.

19 Easy

19 of 70

Remembering +4 | -1

All of the following fungi belongs to Phycomycetes, except

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Correct option: D

Agaricus

Option D is correct because Agaricus belongs to Basidiomycetes, while Rhizopus, Mucor, and Albugo belong to Phycomycetes.

20 Easy

20 of 70

Remembering +4 | -1

Who proposed two kingdom system of classification and named kingdoms as Plantae and Animalia?

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Correct option: A

Carolus Linnaeus

Option A (Carolus Linnaeus) is correct because Carolus Linnaeus proposed the two-kingdom system of classification, naming the kingdoms Plantae and Animalia.

21 Easy

21 of 70

Remembering +4 | -1

Animal cells do not have

View answer and explanation

Correct option: D

Both (b) and (c)

Option D (Both (b) and (c)) is correct because animal cells lack both a cell wall and chloroplasts.

22 Easy

22 of 70

Remembering +4 | -1

Osmoregulation in Paramecium is a function of

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Correct option: A

Contractile vacuole

Option A is correct because the contractile vacuole in Paramecium is responsible for osmoregulation.

23 Easy

23 of 70

Understanding +4 | -1

Which of the following is not matched correctly

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Correct option: D

Albugo-Chrysophytes

Option D (Albugo-Chrysophytes) is not matched correctly because Albugo belongs to the Oomycetes, while Chrysophytes belong to the Kingdom Protista.

24 Easy

24 of 70

Remembering +4 | -1

Viruses posses

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Correct option: D

Nucleic acid and protein

Viruses possess nucleic acid (DNA or RNA) and a protein coat (capsid).

25 Easy

25 of 70

Understanding +4 | -1

Consider the following statements
I. In this group, the Plasmodium differentiates and forms fruiting bodies, bearing spores at their tips
II. Spores possess true walls
III. The spores are dispersed by air currents
IV. The spores are extremely resistant and survive for many years even under adverse conditions
The above statements are assigned to

View answer and explanation

Correct option: B

Slime moulds

Option B (Slime moulds) is correct because the described characteristics (Plasmodium differentiation, spore formation, true walls, air dispersal, and resistance) are typical of slime molds.

26 Easy

26 of 70

Understanding +4 | -1

Assertion: Two kingdom classification was insufficient.

Reason: Majority of organisms failed to fall into either of the categories in two kingdom classification.

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Correct option: A

If both Assertion Reason are true and Reason in the correct explanation of Assertion.

Option A (If both Assertion Reason are true and Reason in the correct explanation of Assertion) is correct because the two-kingdom classification was indeed insufficient due to its inability to properly categorize many organisms.

27 Easy

27 of 70

Understanding +4 | -1

Which is the correct sequence of the sexual cycle of fungi?

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Correct option: B

Plasmogamy

\to

Karyogamy

\to

Meiosis

Option B (Plasmogamy

\to

Karyogamy

\to

Meiosis) is correct because it represents the correct sequence of events in fungal sexual reproduction.

28 Easy

28 of 70

Remembering +4 | -1

Term ‘virus’ means

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Correct option: D

Venom or poisonous fluid

Option D (Venom or poisonous fluid) is correct because that is the original meaning of the term 'virus'.

29 Easy

29 of 70

Analyzing +4 | -1

Organisms having either peptide Bonds or phosphodiester Bonds but not Both
I) Viroids II) Viruses III) Prions IV) Bacteria

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Correct option: D

I, III

Option D (I, III) is correct because viroids only have phosphodiester bonds in their RNA, and prions only have peptide bonds in their protein structure.

30 Easy

30 of 70

Remembering +4 | -1

Which one of the following is wrongly matched?

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Correct option: A

Puccinia– Smut

Option A (Puccinia– Smut) is wrongly matched because Puccinia causes rust diseases, not smut.

Revision notes and key takeaways

Review BIOLOGICAL CLASSIFICATION in your textbook or class notes, then use this set to check your understanding.

Key Takeaways

✓ This set contains 70 single-correct-answer MCQs on BIOLOGICAL CLASSIFICATION.
✓ Try each question before opening its answer. Read the explanation where one is available.
✓ Sign in to save submitted answers. Revisit incorrect answers alongside your textbook or class notes.

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