641.
The hydrogen donor in bacteria phtosynthesis is usually A
Water
B
Hydrogen sulphite
C
Sulphuric acid
D
Ammonia
Answer :
Hydrogen sulphite
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642.
The site where the protein coat (capsid) is synthesized is A
Plasma membrane of the host
B
Mitochondria of the host
C
Ribosome of the host
D
RNA of the virus
Answer :
Ribosome of the host
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643.
Viruses that infect bacteria, multiply and cause their lysis, are called A
lysozymes
B
lipolytic
C
lytic
D
lysogenic
Answer :
lytic
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Viruses that get integrated with the bacterial host genome are called lysogenic. Virus which transmit its DNA into bacterial cell and divide within bacterial cell causing breakdown of bacterial cell wall are called lytic virus. Lysozymes are lipolytic enzymes that catalyse breakdown of fats (lipids).
644.
Which place bacteria are not found A
Soil
B
Ice
C
Sea
D
Distilled water
Answer :
Distilled water
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645.
Toxin (Saxitoxins) secreted by some dinoflagellates enter the body of human beings through food chain and result in A
Medness
B
Paralysis
C
Syphilis
D
Plague
Answer :
Paralysis
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646.
Optimum temperature for Amoeba proteus is A
30°C to 35°C
B
20°C to 25°C
C
5°C to 10°C
D
15°C to 16°C
Answer :
20°C to 25°C
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647.
By which method active food life Paramoecium ingested by Amoeba proteus A
Circumvallation
B
Circumfluence
C
Invagination
D
Import
Answer :
Circumvallation
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648.
Cell membrane of bacteria is made up of A
Cellulose and lipid
B
Chitin
C
Lipid + Protein
D
Protein and Cellulose
Answer :
Lipid + Protein
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649.
No sexual reproduction occur in the algal form belonging to A
Chlrophyceae
B
Myxophyceae
C
Rhodophyceae
D
Pheophyceae
Answer :
Myxophyceae
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650.
Penicillin inhibit the growth of bacteria its side of action A
Mesosome
B
Ribosome
C
Genophore
D
Episome
Answer :
Mesosome
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