12th Grade > Biology
BIOLOGICAL CLASSIFICATION MCQs
Total Questions : 39
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Answer: Option B. -> Heterocysts
:
B
Aheterocystis a differentiated cyanobacterial cell that carries out nitrogen fixation.
:
B
Aheterocystis a differentiated cyanobacterial cell that carries out nitrogen fixation.
Answer: Option C. -> III, V, I, II, IV, VI
:
C
The correct sequence of events in viral replication process is
Adsorption→ Penetration→ Eclipse→ Maturation→ Assembly→Lysis
:
C
The correct sequence of events in viral replication process is
Adsorption→ Penetration→ Eclipse→ Maturation→ Assembly→Lysis
Answer: Option D. -> DNA or RNA as genetic material, and no ribosomes
:
D
A virus differs from a bacterium as it contains either DNA or RNA as genetic material, and has no ribosomes. Since theydo not possess ribosomes, they cannot independently form proteins from molecules ofmessenger RNA (as ribosomes are typically where protein synthesis happens in cells). Because of these limitations, viruses can replicate only within a living host cell.
:
D
A virus differs from a bacterium as it contains either DNA or RNA as genetic material, and has no ribosomes. Since theydo not possess ribosomes, they cannot independently form proteins from molecules ofmessenger RNA (as ribosomes are typically where protein synthesis happens in cells). Because of these limitations, viruses can replicate only within a living host cell.
Answer: Option B. -> Decomposers
:
B
Slime moulds are decomposers.
:
B
Slime moulds are decomposers.
Answer: Option A. -> They are chemosynthetic autotrophs
:
A
They are photosynthetic autotrophs.
:
A
They are photosynthetic autotrophs.
Answer: Option D. -> A well defined nucleus
:
D
Bacteria are prokaryotes and do not have a well-defined nucleus, while plants are eukaryotes and have a well-defined nucleus.
:
D
Bacteria are prokaryotes and do not have a well-defined nucleus, while plants are eukaryotes and have a well-defined nucleus.
Answer: Option B. -> Protozoans lack cell wall
:
B
Protozoans lack cell wall. Cell wall is the characteristic feature of plant cells. Somemoulds are diploid, e.g.,physarum.Dianoflagellates are motile, e.g.,Notiluca,Peridinium etc.,The body of Euglena is covered with pellicle.
:
B
Protozoans lack cell wall. Cell wall is the characteristic feature of plant cells. Somemoulds are diploid, e.g.,physarum.Dianoflagellates are motile, e.g.,Notiluca,Peridinium etc.,The body of Euglena is covered with pellicle.
Answer: Option D. -> Both (b) and (c)
:
D
Diatomaceous earth is used infiltration and purification of liquids as well as insulation and sound proofing.
:
D
Diatomaceous earth is used infiltration and purification of liquids as well as insulation and sound proofing.
Answer: Option A. -> These are all unicellular protists
:
A
Trypanosoma, Noctiluca, Monocystis and Giardia are all unicellular protists.
:
A
Trypanosoma, Noctiluca, Monocystis and Giardia are all unicellular protists.
Answer: Option B. -> R H whittaker
:
B
RHWhittaker proposed the five kingdom classification in 1969 and named the kingdoms as Monera, Protista, Fungi, Plantae and Animalia.
:
B
RHWhittaker proposed the five kingdom classification in 1969 and named the kingdoms as Monera, Protista, Fungi, Plantae and Animalia.
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