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NEET • BIOLOGY • BIOLOGICAL CLASSIFICATION

Biological classification practice · Mixed difficulty

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Showing 151-180 of 234 questions

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151 Medium

151 of 234

Analyzing +4 | -1

How many statements are correct for Deuteromycetes?

(a) Only vegetative phases are known, no asexual and sexual phase

(b) Produces fruiting bodies

(c) Asexual spores are non-motile, exogenous in origin

(d) The mycelium is aseptate and branched

(e) A large number of members are decomposers of litter

View answer and explanation

Correct option: A

Two

Only two statements are correct for Deuteromycetes: (c) Asexual spores are non-motile, exogenous in origin and (e) A large number of members are decomposers of litter.

152 Medium

152 of 234

Understanding +4 | -1

Concerning general characteristic of plants, which statement is correct
I. Some of these may be partially heterotrophic as in case of insectivorous plants line Venus fly trap
II. They have distinct nucleus, chloroplast and chitinous cell wall

View answer and explanation

Correct option: A

Only I

Option A (Only I) is correct because some plants are partially heterotrophic, like insectivorous plants, while plant cell walls are made of cellulose, not chitin.

153 Easy

153 of 234

Remembering +4 | -1

During unfavorable conditions, Amoeba reproduces through

View answer and explanation

Correct option: C

Multiple fission

The correct answer is C (Multiple fission) because Amoeba reproduces through multiple fission during unfavorable conditions to increase survival chances.

154 Medium

154 of 234

Understanding +4 | -1

Which is correct for the structure of cell wall of bacteria and fungi?

View answer and explanation

Correct option: C

Both are made up of N-acetylglucosamine

Option C (Both are made up of N-acetylglucosamine) is correct because N-acetylglucosamine is a component of both bacterial and fungal cell walls.

155 Hard

155 of 234

Understanding +4 | -1

Assertion (A): Viruses did not find a place in classification.

Reason (R): They are not truly living.

View answer and explanation

Correct option: A

Both A and R are correct, R is the correct explanation of A

Option A (Both A and R are correct, R is the correct explanation of A) is correct because viruses are not classified due to their non-living characteristics outside a host cell.

156 Medium

156 of 234

Understanding +4 | -1

Which of the given statement best describes the gametophytic in the alternation of generation life cycle?

View answer and explanation

Correct option: A

Generation that produces the gametes

Option A (Generation that produces the gametes) is correct because the gametophytic generation is the haploid phase in the alternation of generations life cycle that produces gametes through mitosis.

157 Hard

157 of 234

Remembering +4 | -1

Substances secreted by bacteria are

View answer and explanation

Correct option: B

Toxins

Option B (Toxins) is correct because bacteria secrete various substances, including toxins, which can be harmful to the host.

158 Easy

158 of 234

Understanding +4 | -1

Kingdom-Protista includes

View answer and explanation

Correct option: D

Both (2) and (3)

Option D (Both (2) and (3)) is correct because some protists show zygotic meiosis and others show gametic meiosis.

159 Hard

159 of 234

Remembering +4 | -1

Which of the following group of diseases is caused by viruses?

View answer and explanation

Correct option: A

Mumps, smallpox, herpes, influenza

Option A (Mumps, smallpox, herpes, influenza) is correct because all these diseases are caused by viruses.

160 Medium

160 of 234

Analyzing +4 | -1

Analyse the following statements regarding cyanobacteria and identify the correct option given below
I. The cyanobacteria are unicellular, colonial or filamentous, marine or terrestrial algae
II. The colonies of cyanobacteria are generally surrounded by gelatinous sheath
Codes

View answer and explanation

Correct option: C

I and II

Option C is correct because both statements accurately describe cyanobacteria: they can be unicellular, colonial, or filamentous, and their colonies are often surrounded by a gelatinous sheath.

161 Medium

161 of 234

Understanding +4 | -1

Viruses have

View answer and explanation

Correct option: C

Both living and non-living characteristics

Option C (Both living and non-living characteristics) is correct because viruses exhibit characteristics of both living and non-living entities depending on whether they are inside or outside a host cell.

162 Medium

162 of 234

Understanding +4 | -1

The non-living characteristic of viruses is

View answer and explanation

Correct option: D

Ability to be crystallize

Option D (Ability to be crystallize) is correct because crystallization is a property of non-living matter, and viruses can be crystallized outside of a host cell.

163 Easy

163 of 234

Understanding +4 | -1

Find out the pairs, which are correctly matched? I. Cyanobacteria –Biopesticides II. Mycorrhiza – Solubilization of phosphate III. Bacillus thuringiensis – cry protein IV. Single cell protein – Rhizobia

View answer and explanation

Correct option: B

II and III

Option B (II and III) is correct because Mycorrhiza aids in phosphate solubilization, and Bacillus thuringiensis produces cry protein.

164 Medium

164 of 234

Analyzing +4 | -1

The genetic material of causal agent of PSTD is different from genetic material of casual agent of Tobacco mosaic disease as former

View answer and explanation

Correct option: C

Has genetic material of low molecular weight

Option D (Both 1 and 3) is correct because the causal agent of PSTD (Potato Spindle Tuber Disease) is a viroid, which has ssRNA and a low molecular weight compared to the causal agent of Tobacco Mosaic Disease (TMV), which is a virus with ssRNA.

165 Easy

165 of 234

Understanding +4 | -1

Fungi show asexual reproduction by all of the following kinds of spores except

View answer and explanation

Correct option: B

Oospore

Option B (Oospore) is correct because Oospores are a product of sexual reproduction, while the question asks for asexual spores.

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166 Hard

166 of 234

Understanding +4 | -1

Consider the following statements about class-Phycomycetes? I. Member may be obligate parasite on plants II. The mycelium is aseptate and coenocytic III. Asexual reproduction involves the formation of spore containing sac or sporangia. In aquatic conditions, the sporangia produces zoospores Which of the statements given above are correct?

View answer and explanation

Correct option: D

I, II and III

Option D (I, II and III) is correct because all three statements accurately describe characteristics of Phycomycetes.

167 Hard

167 of 234

Remembering +4 | -1

Which of the following combinations of characters is true for slime moulds?

View answer and explanation

Correct option: D

Saprophytic, plasmodium without walls, spores dispersed by air currents

The correct answer is D (Saprophytic, plasmodium without walls, spores dispersed by air currents) because slime molds are saprophytic, their plasmodium lacks cell walls, and their spores are dispersed by air.

168 Medium

168 of 234

Remembering +4 | -1

‘Ordines Anomali’ of Bentham and Hooker includes

View answer and explanation

Correct option: D

A few orders which could not be placed satisfactorily in the classification

Option D (A few orders which could not be placed satisfactorily in the classification) is correct because 'Ordines Anomali' in Bentham and Hooker's classification included orders that didn't fit neatly into their system.

169 Medium

169 of 234

Remembering +4 | -1

In which of the following patterns of viral replication, viruses enter a cell, replicate and then cause the cell to burst, releasing new viruses?

View answer and explanation

Correct option: A

Lytic

Option A (Lytic) is correct because the lytic cycle involves viral replication and cell lysis.

170 Hard

170 of 234

Understanding +4 | -1

Enveloped virus enters into host cells by

View answer and explanation

Correct option: D

Fusion with the plasma membrane of host

Option D (Fusion with the plasma membrane of host) is correct because enveloped viruses enter host cells by fusing their envelope with the host cell's plasma membrane, releasing the viral contents inside.

171 Medium

171 of 234

Remembering +4 | -1

Red tide in warms coastal water is caused due to the rapid multiplications of

View answer and explanation

Correct option: C

Gonyaulax

Option C (Gonyaulax) is correct because red tide is caused by the rapid multiplication of Gonyaulax, a type of dinoflagellate.

172 Hard

172 of 234

Remembering +4 | -1

All are the viral diseases except

View answer and explanation

Correct option: D

Anthrax

Option D (Anthrax) is correct because anthrax is caused by bacteria, not a virus.

173 Medium

173 of 234

Remembering +4 | -1

Chromosomes in a bacterial cell can be 1-3 in number and

View answer and explanation

Correct option: C

Are always circular

Option C (Are always circular) is correct because bacterial chromosomes are typically circular and not enclosed within a nucleus.

174 Medium

174 of 234

Analyzing +4 | -1

Assertion: Infectious agents causing mad cow disease can not show genetic integrity

Reason: PSTV caused by viriods.

View answer and explanation

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 prions, the infectious agents causing mad cow disease, lack nucleic acids and therefore cannot show genetic integrity, and PSTV caused by viroids are infectious agents that also lack genetic integrity.

175 Hard

175 of 234

Understanding +4 | -1

[A]: Unicellular organisms occur in 3 kingdoms.
[R]: Multicellular organisms also occur in 3 kingdoms.

View answer and explanation

Correct option: B

Both A and R are true and R is not the correct explanation of A

Option B (Both A and R are true and R is not the correct explanation of A) is correct because unicellular organisms occur in 3 kingdoms (Monera, Protista, and some Fungi) and multicellular organisms also occur in 3 kingdoms (Fungi, Plantae, and Animalia), but the reason does not explain the assertion.

176 Easy

176 of 234

Analyzing +4 | -1

Analyse the following statements and identify the correct options given below
I. Two kingdom system of classification did not distinguish between the eukaryotes and prokaryotes, unicellular and multicellular organism and green algae and fungi.
II. The two kingdom classification used for a long time was found inadequate

View answer and explanation

Correct option: C

I and II are true

Option C (I and II are true) is correct because the two-kingdom system had limitations in distinguishing between different types of organisms and was eventually found inadequate.

177 Hard

177 of 234

Understanding +4 | -1

Some bacteria utilises inorganic substances like nitrate, nitrite, ammonia, etc., for the oxidation and release of energy for ATP production. These are known as

View answer and explanation

Correct option: B

Chemosynthetic autotrophic bacteria

Option B (Chemosynthetic autotrophic bacteria) is correct because they derive energy from oxidizing inorganic substances.

178 Easy

178 of 234

Remembering +4 | -1

Membrane-bound organelles are absent in

View answer and explanation

Correct option: B

Streptococcus

Option B (Streptococcus) is correct because Streptococcus is a prokaryote, and prokaryotes lack membrane-bound organelles.

179 Medium

179 of 234

Analyzing +4 | -1

Consider the following features
(a) Lack of cell wall and cannot pass through bacterial filter.
(b) Can survive without oxygen and are free living eukaryotes.
(c) Reproduce mainly by fission
(d) Insensitive to penicillin.
Select the option which includes incorrect feature w.r.t. highly pleomorphic and smallest organisms.

View answer and explanation

Correct option: A

(a), (b) and (c)

The correct answer is A ((a), (b) and (c)) because Mycoplasmas have no cell wall, cannot pass through bacterial filters due to their size, can survive without oxygen, and reproduce mainly by fission. Therefore, statements (a), (b), and (c) are incorrect when referring to Mycoplasma.

180 Medium

180 of 234

Application +4 | -1

What is the total number of amino acids when
the capsid of TMV contains 2130 capsomers?

View answer and explanation

Correct option: A

336540

Option A (336540) is correct because each capsomer in TMV contains 158 amino acids, and multiplying this by the number of capsomers gives the total number of amino acids.

Revision notes and key takeaways

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

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Biological classification practice · Mixed difficulty

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