Free Objective Test 02 Practice Test - 11th and 12th 

Question 1

A virus differs from a bacterium as it (virus) contains

A.

A cell wall

B.

Cytosol    

C.

DNA as genetic material

D.

DNA or RNA as genetic material, and no ribosomes

SOLUTION

Solution : D

A virus differs from a bacterium as it contains either DNA or RNA as genetic material, and has no ribosomes. Since they do not possess ribosomes, they cannot independently form proteins from molecules of messenger RNA (as ribosomes are typically where protein synthesis happens in cells). Because of these limitations, viruses can replicate only within a living host cell. 

Question 2

Diatomaceous earth is used in 

A.

Purification of uranium

B.

Filtration and purification of liquids

C.

Insulation and sound proofing

D.

Both (b) and (c)

SOLUTION

Solution : D

Diatomaceous earth is used in filtration and purification of liquids as well as insulation and sound proofing. 

Question 3

Slime moulds are ecologically

A.

Consumers    

B.

Decomposers

C.

Both (a) and (b) 

D.

Carnivores

SOLUTION

Solution : B

Slime moulds are decomposers.

Question 4

Which of the following is false regarding Cyanobacteria?

A.

They are chemosynthetic autotrophs

B.

They often form blooms in polluted water bodies

C.

Anabaena is an example of this group

D.

They have chlorophyll - a similar to green plants

SOLUTION

Solution : A

They are photosynthetic autotrophs.

Question 5

Cyanobacterial cells which are specialized for nitrogen fixation are

A.

Homogenes

B.

Heterocysts

C.

Endospores

D.

Akinetes

SOLUTION

Solution : B

A heterocyst is a differentiated cyanobacterial cell that carries out nitrogen fixation. 

Question 6

Flagella of prokaryotic and eukaryotic cells differ in

A.

Type of movement and placement in cell             

B.

Location in cell and mode of functioning

C.

Microtubular organization and type of movement

D.

Macrotubular organization and function

SOLUTION

Solution : C

Eukaryotic flagella show 9+2 arrangement which is absent in prokaryotes.

Question 7

Who proposed five kingdom classification and named kingdoms as Monera, Protista, Fungi, Plantae and Animalia?

A.

Herbert Copeland

B.

R H whittaker

C.

Carl woese

D.

Carolus Linnaeus

SOLUTION

Solution : B

R H Whittaker proposed the five kingdom classification in 1969 and named the kingdoms as Monera, Protista, Fungi, Plantae and Animalia.
 

Question 8

What is common about Trypanosoma, Noctiluca, Monocystis and Giardia?

A. These are all unicellular protists
B. They have flagella
C. They produce spores
D. These are all parasites

SOLUTION

Solution : A

Trypanosoma, Noctiluca, Monocystis and Giardia are all unicellular protists.

Question 9

A virus differs from a bacterium as it (virus) contains

A.

A cell wall

B.

Cytosol    

C.

DNA as genetic material

D.

DNA or RNA as genetic material, and no ribosomes

SOLUTION

Solution : D

A virus differs from a bacterium as it contains either DNA or RNA as genetic material, and has no ribosomes. Since they do not possess ribosomes, they cannot independently form proteins from molecules of messenger RNA (as ribosomes are typically where protein synthesis happens in cells). Because of these limitations, viruses can replicate only within a living host cell. 

Question 10

Diatomaceous earth is used in 

A.

Purification of uranium

B.

Filtration and purification of liquids

C.

Insulation and sound proofing

D.

Both (b) and (c)

SOLUTION

Solution : D

Diatomaceous earth is used in filtration and purification of liquids as well as insulation and sound proofing. 

Question 11

Slime moulds are ecologically

A.

Consumers    

B.

Decomposers

C.

Both (a) and (b) 

D.

Carnivores

SOLUTION

Solution : B

Slime moulds are decomposers.

Question 12

Which of the following is false regarding Cyanobacteria?

A.

They are chemosynthetic autotrophs

B.

They often form blooms in polluted water bodies

C.

Anabaena is an example of this group

D.

They have chlorophyll - a similar to green plants

SOLUTION

Solution : A

They are photosynthetic autotrophs.

Question 13

Cyanobacterial cells which are specialized for nitrogen fixation are

A.

Homogenes

B.

Heterocysts

C.

Endospores

D.

Akinetes

SOLUTION

Solution : B

A heterocyst is a differentiated cyanobacterial cell that carries out nitrogen fixation. 

Question 14

Flagella of prokaryotic and eukaryotic cells differ in

A.

Type of movement and placement in cell             

B.

Location in cell and mode of functioning

C.

Microtubular organization and type of movement

D.

Macrotubular organization and function

SOLUTION

Solution : C

Eukaryotic flagella show 9+2 arrangement which is absent in prokaryotes.

Question 15

Who proposed five kingdom classification and named kingdoms as Monera, Protista, Fungi, Plantae and Animalia?

A.

Herbert Copeland

B.

R H whittaker

C.

Carl woese

D.

Carolus Linnaeus

SOLUTION

Solution : B

R H Whittaker proposed the five kingdom classification in 1969 and named the kingdoms as Monera, Protista, Fungi, Plantae and Animalia.
 

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