51.
Which one of the following is true for fungi? A
They are phagotrophs
B
They lack a rigid cell wall
C
They are heterotrophs
D
They lack nuclear membrane
Answer :
They are heterotrophs
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Fungi lack chlorophyll, hence, they do not prepare their food by photosynthesis. They can grow where organic material is available. So, they are heterotrophs that acquire their nutrient by absorption and store in the form of glycogen.
52.
NIF gene found in A
Pseudomonas
B
Salmonella
C
Rhizobium
D
Mycobacterium
Answer :
Rhizobium
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53.
According to five kingdom system the unicellular algae like Dinoflagellates, Diatoms and Euglenoids are included in kingdom A
Monera
B
Protista
C
Plantae
D
Animalia
Answer :
Protista
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54.
Which of the following components provides sticky character to the bacterial cell? A
Nuclear membrane
B
Plasma membrane
C
Glycocalyx
D
Cell wall
Answer :
Glycocalyx
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Sticky character of the bacterial wall is due to glycocalyx which is rich in glycoproteins.Notes : When on eukaryotic cells the glycocalyx can be a factor used for the recognition of the cell. On bacterial cells, the glycocalyx provides a protective coat from host factors.
55.
Black rust of wheat is caused by A
Puccinia
B
Mucor
C
Aspergillus
D
Rhizopus
Answer :
Puccinia
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56.
Single-celled eukaryotes are included in: A
Protista
B
Fungi
C
Archaea
D
Monera
Answer :
Protista
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Single celled eukaryotes are included in protista. Protista includes all unicellular and colonial eukaryotes except green and red algae. It is also known as kingdom of unicellular eukaryotes.
57.
Amoeba is immortal because A
It never dies
B
It regenerates
C
It merges in offspring
D
It rejuvenates
Answer :
It merges in offspring
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58.
In which of the animals dimorphic nucleus is found? A
Amoeba proteus
B
Trypanosoma gambiense
C
Plasmodium vivax
D
Paramecium caudatum
Answer :
Paramecium caudatum
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Paramecium has two types of nucleus, a larger macronucleus involved with the vegetative activities and a smaller involved with reproduction.
59.
Chlorophyll 'a' C - phycocyanin and C - phycoerythrin are pigments of A
Red algae
B
Blue green algae
C
Brown algae
D
Green algae
Answer :
Blue green algae
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60.
Pili in bacteria are used for A
Locomotion
B
Respiration
C
Conjugation
D
Transformation
Answer :
Conjugation
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