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NEET • BIOLOGY • BIOLOGICAL CLASSIFICATION
Biological classification practice · Mixed difficulty
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Showing 31-60 of 234 questions
31
Medium
31 of 234
Analyzing
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Assertion: Plasmodium causes disease in female
Anopheles mosquitoes.
Reason: Female Anopheles mosquitoes feed on
plasmodial blood.
Anopheles mosquitoes.
Reason: Female Anopheles mosquitoes feed on
plasmodial blood.
View answer and explanation
Correct option: D
If both Assertion and Reason are false
Option D (If both Assertion and Reason are false) is correct because Plasmodium causes disease in humans, not mosquitoes, and female Anopheles mosquitoes feed on blood containing Plasmodium, not \"plasmodial blood.\"
32
Hard
32 of 234
Understanding
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Consider the following statements I. All prokaryotic organism were grouped together under kingdom-Monera II. The unicellular eukaryotic organism were placed in kingdom-Protista III. Chlorella and Chlamydomonas, both were having cell walls IV. Paramecium and Amoeba lack cell walls V. Kingdom-Protista has brought together Chlamydomona,Chlorella with Paramecium and Amoeba Which of the statements give above are correct?
View answer and explanation
Correct option: D
I, II III, IV and V
Option D (I, II III, IV and V) is correct because all statements accurately describe the characteristics and classification within Monera and Protista.
33
Easy
33 of 234
Remembering
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Single stranded nucleic acid is found in
View answer and explanation
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.
34
Hard
34 of 234
Remembering
+4 | -1
Bacteria differ from plants in that they do not have
View answer and explanation
Correct option: D
A well define nucleus
Option D (A well define nucleus) is correct because bacteria are prokaryotes and lack a membrane-bound nucleus.
35
Hard
35 of 234
Remembering
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An eukaryote, which causes disease comes under
View answer and explanation
Correct option: B
Fungus
Option B (Fungus) is correct because fungi are eukaryotes and can cause diseases in plants and animals.
36
Easy
36 of 234
Remembering
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Eubacteria have rigid cell wall made up of
View answer and explanation
Correct option: B
Peptidoglycan
Option B (Peptidoglycan) is correct because eubacteria cell walls are primarily composed of peptidoglycan, also known as murein.
37
Medium
37 of 234
Understanding
+4 | -1
Which one of the following is a matching pair of certain organism (s) and the kind of association?
View answer and explanation
Correct option: B
Algae and fungi in lichens – Mutualism
Option B (Algae and fungi in lichens – Mutualism) is correct because lichens are a symbiotic association where algae provide food and fungi provide structure and protection.
38
Easy
38 of 234
Understanding
+4 | -1
Which of the following phenomenon proves that viruses are living?
View answer and explanation
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.
39
Easy
39 of 234
Understanding
+4 | -1
In the five kingdom classification of Whittaker there is no mention of all of the following, except
View answer and explanation
Correct option: C
Autotrophic prokaryotes
Option C (Autotrophic prokaryotes) is correct because Whittaker's classification includes Monera, which contains autotrophic prokaryotes.
40
Hard
40 of 234
Understanding
+4 | -1
Read the statements given below. Which of these is wrong?
View answer and explanation
Correct option: A
Sporangiospores borne in the sporangium of Rhizopus are diploid structures
Option A (Sporangiospores borne in the sporangium of Rhizopus are diploid structures) is correct because sporangiospores in Rhizopus are haploid, not diploid.
41
Easy
41 of 234
Remembering
+4 | -1
Which of the following organisms completely lack cell wall, they are the smallest living cells known and can survive without oxygen?
View answer and explanation
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).
42
Hard
42 of 234
Remembering
+4 | -1
Which of the following does not secrete toxins during storage conditions of crop plants?
View answer and explanation
Correct option: D
Colletotrichum
Option D (Colletotrichum) is correct because while Aspergillus, Penicillium, and Fusarium are known to produce mycotoxins during storage, Colletotrichum is less commonly associated with toxin production in stored crops.
43
Medium
43 of 234
Remembering
+4 | -1
Which of the following is a symbiotic nitrogen fixer?
View answer and explanation
Correct option: C
Frankia
Option C (Frankia) is correct because Frankia is a symbiotic nitrogen-fixing actinomycete that forms root nodules in non-leguminous plants.
44
Easy
44 of 234
Remembering
+4 | -1
Which of the following is a Gram negative bacterium?
View answer and explanation
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.
45
Medium
45 of 234
Understanding
+4 | -1
All monerans
View answer and explanation
Correct option: D
All of the above
Option D (All of the above) is correct because all monerans contain DNA and RNA, have a circular DNA strand without a nuclear membrane, and are bacteria.
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46
Medium
46 of 234
Analyzing
+4 | -1
Assertion: Unicellular green algae were not
included in protista by Whitttaker.
Reason: Distinction between unicellular and
multicellular organisms is not possible in case
of algae.
included in protista by Whitttaker.
Reason: Distinction between unicellular and
multicellular organisms is not possible in case
of algae.
View answer and explanation
Correct option: A
If both Assertion and Reason are true and
Reason is the correct explanation of Assertion
Reason is the correct explanation of Assertion
Option A (If both Assertion and Reason are true and Reason is the correct explanation of Assertion) is correct because unicellular green algae were not included in Protista by Whittaker, and the distinction between unicellular and multicellular organisms is difficult in the case of algae, which is why they were placed elsewhere.
47
Hard
47 of 234
Understanding
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Which of the following statement about Mycoplasma is true:
View answer and explanation
Correct option: B
They differ from viruses in being cellular in organisation
Option B is correct because Mycoplasma are cellular organisms, unlike viruses which are acellular.
48
Medium
48 of 234
Understanding
+4 | -1
Read the following statements regarding archaebacteria and select the correct option
I. Archaebacteria differs from other bacteria in having different cell wall structure
II. Their cell wall is made up of cellulose and contains high amount of unsaturated fatty acid, which is responsible for their survival in extreme conditions
III. Thermoacidophiles have dual ability to tolerate high temperature as well as high acidity
I. Archaebacteria differs from other bacteria in having different cell wall structure
II. Their cell wall is made up of cellulose and contains high amount of unsaturated fatty acid, which is responsible for their survival in extreme conditions
III. Thermoacidophiles have dual ability to tolerate high temperature as well as high acidity
View answer and explanation
Correct option: B
I and III are true
Option B (I and III are true) is correct because Archaebacteria have different cell wall structures and thermoacidophiles can tolerate high temperature and acidity.
49
Easy
49 of 234
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.
50
Easy
50 of 234
Remembering
+4 | -1
Fungi imperfecti includes
View answer and explanation
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.
51
Easy
51 of 234
Remembering
+4 | -1
The replacement of two kingdom grouping by five kingdom classification was proposed in the year
View answer and explanation
Correct option: D
1969
Option D (1969) is correct because R.H. Whittaker proposed the five-kingdom classification system in 1969.
52
Hard
52 of 234
Remembering
+4 | -1
The slime moulds are characterized by the presence of
View answer and explanation
Correct option: C
Capillitium
The correct answer is C (Capillitium) because capillitium are thread-like structures found within the spore-bearing structures of slime molds, aiding in spore dispersal.
53
Medium
53 of 234
Remembering
+4 | -1
In five kingdom system of classification of R H Whittaker, how many kingdoms contain eukaryotes?
View answer and explanation
Correct option: A
Four Kingdoms
Option A (Four Kingdoms) is correct because Protista, Fungi, Plantae, and Animalia are eukaryotic kingdoms in Whittaker's classification.
54
Hard
54 of 234
Understanding
+4 | -1
A eukaryote, without a cellulosic cell wall, presence of multicellular/loose tissue body organization showing heterotrophic (saprophytic/parasitic) nutrition is
View answer and explanation
Correct option: C
Mycota
Option C (Mycota) is correct because Mycota (fungi) are eukaryotes without cellulosic cell walls, exhibit multicellular organization, and are heterotrophic.
55
Hard
55 of 234
Understanding
+4 | -1
Select the false statement
View answer and explanation
Correct option: D
Phycomycetes are called club fungi because of a club-shaped end of mycelium known as basidium
Option D is the false statement. Phycomycetes are not called club fungi; Basidiomycetes are.
56
Easy
56 of 234
Application
+4 | -1
A bacterium divides after every 35 min, if a culture containing cells per mL is grown, then cell concentration per mL after 175 min will be
View answer and explanation
Correct option: D
Option D () is correct because after 175 minutes (5 divisions), the initial cell concentration multiplies by .
57
Easy
57 of 234
Remembering
+4 | -1
Which of the following statements is correct with respect to Colletotrichum falcatum?
View answer and explanation
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.
58
Easy
58 of 234
Remembering
+4 | -1
All of the following fungi belongs to Phycomycetes, except
View answer and explanation
Correct option: D
Agaricus
Option D is correct because Agaricus belongs to Basidiomycetes, while Rhizopus, Mucor, and Albugo belong to Phycomycetes.
59
Medium
59 of 234
Remembering
+4 | -1
Which one of following has haplontic life cycle?
View answer and explanation
Correct option: C
Ustilago
Option C (Ustilago) is correct because Ustilago (smut fungus) has a haplontic life cycle, where the zygote is the only diploid stage.
60
Medium
60 of 234
Understanding
+4 | -1
Consider the following statements
I. Mycelium is branched and septate
II. The asexual spores are generally not formed
III. Vegetative reproduction takes place by framentation
IV. Sex organs are absent but sexual reproduction takes place by somatogamy
V. Karyogamy and meiosis takes place in basidium to form haploid four basidiospores
Vi. Basidia are arranged in fruiting bodies called basidiocarp
The above statements are assigned to
I. Mycelium is branched and septate
II. The asexual spores are generally not formed
III. Vegetative reproduction takes place by framentation
IV. Sex organs are absent but sexual reproduction takes place by somatogamy
V. Karyogamy and meiosis takes place in basidium to form haploid four basidiospores
Vi. Basidia are arranged in fruiting bodies called basidiocarp
The above statements are assigned to
View answer and explanation
Correct option: B
Bracket fungi
Option D (Club fungi) is correct because the statements describe characteristics of Basidiomycetes (club fungi).
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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