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NEET • BIOLOGY • BIOLOGICAL CLASSIFICATION

Biological classification practice · Mixed difficulty

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Showing 1-30 of 234 questions

1 Medium

1 of 234

Remembering +4 | -1

Auxospores and homocysts are formed, respectively by

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Correct option: A

Several diatoms and a few cyanobacteria

The correct answer is A (Several diatoms and a few cyanobacteria) because auxospores are formed by diatoms, and heterocysts are formed by some cyanobacteria for nitrogen fixation.

2 Easy

2 of 234

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.

3 Hard

3 of 234

Understanding +4 | -1

In some viruses, RNA is present instead of DNA indicating that.

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Correct option: D

RNA can transfer heredity material.

Option D (RNA can transfer heredity material) is correct because the presence of RNA instead of DNA in some viruses demonstrates that RNA can function as the genetic material and carry hereditary information.

4 Medium

4 of 234

Analyzing +4 | -1

Small pox, herpes, crown gall tumour, cretinism, curling, influenza, AIDS, mumps and chlorosis are various diseases or symptoms of a disease. Out of these, how many belong to animal and plants, respectively?

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Correct option: A

6 to animal and 3 to plants

Option A (6 to animal and 3 to plants) is correct because Small pox, herpes, cretinism, influenza, AIDS, and mumps are animal diseases, while crown gall tumor, curling, and chlorosis are plant diseases/symptoms.

5 Medium

5 of 234

Analyzing +4 | -1

Find the odd one from the following based on ploidy level

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Correct option: D

Oospores

Option D (Oospores) is correct because conidia, zoospores, and basidiospores are haploid (n), while oospores are diploid (2n) as they result from sexual reproduction.

6 Medium

6 of 234

Remembering +4 | -1

Red tides in warm coastal water develops due to the presence of

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Correct option: A

Dinoflagellates

Option A (Dinoflagellates) is correct because red tides are caused by the rapid multiplication of certain dinoflagellates in warm coastal waters.

7 Hard

7 of 234

Analyzing +4 | -1

Choose the correct statements related of binary
fission of Paramecium?

(i) During favorable conditions Paramecium
stops feeding after attaining its maximum
growth

(ii) At first the micronucleus divides by
amitosis and the macronucleus divides into
two daughter nuclei by mitosis

(iii) The proter receives the anterior contractile
vacuole, cytopharynx and cytostome from
its parent individuals

(iv) Before karyokinesis a transverse constriction
appears in the middle of the body

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Correct option: C

Except (ii) and (iv) all are correct

Option C is correct because statements (i) and (iii) are correct regarding binary fission in Paramecium, while (ii) and (iv) are incorrect.

8 Medium

8 of 234

Remembering +4 | -1

Which of the following does not belong to the kingdom-Protista?

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Correct option: C

Ascomycetes

Option C (Ascomycetes) is correct because Ascomycetes belong to the kingdom Fungi, not Protista.

9 Medium

9 of 234

Understanding +4 | -1

What is common about Trypanosoma,Noctiluca Monocystis and Giardia?

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Correct option: A

These are all unicellular protists

Option A (These are all unicellular protists) is correct because Trypanosoma, Noctiluca, Monocystis, and Giardia are all single-celled eukaryotic organisms belonging to the Protista kingdom.

10 Hard

10 of 234

Remembering +4 | -1

Which is a fungal disease?

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Correct option: A

Athlete’s foot

Option A (Athlete’s foot) is correct because athlete's foot is a common fungal infection of the skin.

11 Hard

11 of 234

Understanding +4 | -1

Read the following statements about protists and state how many of them are true.

(i) Euglenoids have a carbohydrate rich layer called pellicle.

(ii) Slime molds are saprophytic fungi.

(iii) Dinoflagellates are mostly found in fresh water and are photosynthetic.

(iv) Spores of slime molds are dispersed by water.

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Correct option: D

Zero

Option D (Zero) is correct because all four statements contain inaccuracies regarding the characteristics of protists.

12 Medium

12 of 234

Understanding +4 | -1

Classification of plants proposed by Carolus Linnaeus was artificial because it was based on

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Correct option: A

Only a few morphological characters

Option A (Only a few morphological characters) is correct because Linnaeus's artificial classification relied on superficial similarities rather than evolutionary relationships.

13 Medium

13 of 234

Understanding +4 | -1

The given statements describes a group of organism
I. Instead of a cell wall, they have a protein rich layer called pellicle which makes their body flexible
II. They have two flagella a short and a long one
III. They are photosynthetic in the presence of sunlight, when deprived of sunlight they behave like heterotrophs by predating on other smaller organism
Which of the following group is referred here?

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Correct option: C

Euglenoids

Option C (Euglenoids) is correct because the description matches the characteristics of Euglenoids: pellicle, two flagella, and mixotrophic nutrition.

14 Easy

14 of 234

Remembering +4 | -1

Five kingdom classification was given by

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Correct option: C

Whittaker

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

15 Medium

15 of 234

Understanding +4 | -1

Yeast is not included in protozoans but in fungi because

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Correct option: B

Some fungal hyphae grow in such a way that they give the appearance of psuedomycelium

Option B (Some fungal hyphae grow in such a way that they give the appearance of psuedomycelium) is the correct answer because it highlights a key characteristic that links yeast to fungi.

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16 Easy

16 of 234

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.

17 Medium

17 of 234

Remembering +4 | -1

The bacteria that can reside in extreme salty areas are called as

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Correct option: A

Halophiles

Option A (Halophiles) is correct because halophiles are organisms that thrive in environments with high salt concentrations.

18 Medium

18 of 234

Understanding +4 | -1

Select incorrect pair.

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Correct option: D

Monera – eukaryote

Option D (Monera – eukaryote) is correct because Monera consists of prokaryotic organisms, not eukaryotes.

19 Easy

19 of 234

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.

20 Easy

20 of 234

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.

21 Medium

21 of 234

Understanding +4 | -1

Ratio of kingdoms with prokaryotes and eukaryotes in Whittaker’s classification and Carl Woese kingdom classification respectively

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Correct option: A

1 : 4 and 1 : 2

Option A (1 : 4 and 1 : 2) is correct because Whittaker's classification has 1 prokaryotic kingdom (Monera) and 4 eukaryotic kingdoms, while Woese's has 1 prokaryotic domain (Bacteria) and 2 eukaryotic domains (Archaea and Eukarya).

22 Medium

22 of 234

Remembering +4 | -1

Slime moulds in the division-Myxomycota (true slime moulds) have

View answer and explanation

Correct option: C

Spores that develop into flagellated warm cells

The correct answer is B (Spores that develop into free living amoeboid cells) because slime molds of Myxomycota produce spores that germinate into amoeboid cells or flagellated cells.

23 Hard

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Understanding +4 | -1

Assertion: Escherichia coli, Shigella sp. And Salmonella sp. are all responsible for diarrhoeal diseases.
Reason: Dehydration is common to all types of diarrhoeal diseases. In this disease adequate supply of fluids and electrolytes should be ensured.

View answer and explanation

Correct option: B

If both assertion and reason are correct but reason is not a correct explanation of the assertion.

Option B (If both assertion and reason are correct but reason is not a correct explanation of the assertion) is correct because both statements are true, but dehydration being common doesn't explain why those specific bacteria cause diarrhea.

24 Medium

24 of 234

Remembering +4 | -1

Which of the following class of fungi helps in mineral cycling?

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Correct option: A

Deuteromycetes

Option A (Deuteromycetes) is correct because some members of Deuteromycetes play a role in mineral cycling by decomposing organic matter.

25 Medium

25 of 234

Remembering +4 | -1

Which of the following groups are placed under the kingdom-Protista?

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Correct option: D

All of the above

Option D (All of the above) is correct because Crysophytes, Dianoflagellate and euglenoids, and Slime moulds and protozoans are all groups placed under the kingdom Protista.

26 Hard

26 of 234

Remembering +4 | -1

Fertile layer of gills in agaricus is known as?

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Correct option: A

Hymeinum

Option A (Hymeinum) is correct because the hymenium is the fertile layer of gills in Agaricus where basidia and basidiospores are produced.

27 Easy

27 of 234

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.

28 Medium

28 of 234

Remembering +4 | -1

Parasitic and saprophytic conditions are more familiar in

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Correct option: A

Fungi

Option A (Fungi) is correct because fungi exhibit both parasitic and saprophytic modes of nutrition more commonly than other groups.

29 Medium

29 of 234

Remembering +4 | -1

The first attempt to classify organisms on scientific basis was done by

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Correct option: B

Aristotle

Option B (Aristotle) is correct because he made the first known attempt to classify organisms scientifically.

30 Easy

30 of 234

Remembering +4 | -1

Kingdom-Animalia includes

View answer and explanation

Correct option: D

All of these

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

Revision notes and key takeaways

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Key Takeaways

✓ This set contains 234 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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