Q251
Allen
6. (A) NCERT BASED QUESTIONS
MCQ
Select false statement :-
A.
Lichens are symbiotic association between algae & fungi
B.
Viruses are smaller than bacteria
C.
Virus name are obligate parasites
D.
Viruses are facultative parasite
Q252
Allen
6. (A) NCERT BASED QUESTIONS
MCQ
Select incorrect statement about viroid :-
A.
Free infectious RNA
B.
It was discovered by T.O. Diener
C.
It causes potato spindle tuber disease
D.
It contains high molecular weight RNA
Q253
Allen
6. (A) NCERT BASED QUESTIONS
MCQ
Which is incorrect statement ?
A.
The Mycoplasma are organisms that completely lack a cell wall.
B.
Mycoplasma can survive without oxygen.
C.
Mycoplasma are the smallest living cells.
D.
Mycoplasma can cause disease only in plants.
Q254
Allen
6. (A) NCERT BASED QUESTIONS
MCQ
Generally plant viruses are :-
A.
Double stranded DNA viruses
B.
Single stranded RNA viruses
C.
Single stranded DNA viruses
D.
Double stranded RNA viruses
Q255
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Modern farmer's can increase the yield of Paddy upto 50% by the use of :-
A.
Cyanobacteria
B.
Rhizobium
C.
Cyanobacteria in Azolla pinnata
D.
Farm yard manure
Q256
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Plant pathogenic bacteria are mostly :-
A.
Gram + Non spore forming
B.
Gram - Negative non spore forming
C.
Gram + spore forming
D.
Gram (-) spore forming
Q257
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Nitrogen fixing bacteria convert :-
A.
N2 → NH3
B.
NH4+ → Nitrates
C.
NO2 → NO3
D.
NO3 → N2
Q258
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Main reason of water bloom in rivers, lakes, sea etc. is:-
A.
Brown algae and green algae
B.
Cyanobacteria and dinoflagellates
C.
Eichornia
D.
Fishes
Q259
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Genetic material of prokaryotic cell:-
A.
Non histonic double stranded DNA
B.
Histonic double stranded DNA
C.
Histone & DNA both are absent
D.
Histone without DNA
Q260
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Diatomaceous earth is used as heat insulator in boilers and steam pipes because the cell wall of diatom -
A.
Composed of Iron
B.
Composed of Silicon dioxide
C.
Is conductor of heat
D.
Is bad conductor of electricity
Q261
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Enzymes are not found in-
A.
Fungi
B.
Algae
C.
Virus
D.
Cyanobacteria
Q262
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Plant Decomposers belong to :-
A.
Monera and fungi
B.
Fungi and plants
C.
Protista and Animalia
D.
Animalia and Monera
Q263
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Sexual reproduction in fungus occurs in the following sequential event. Arrange them properly.
(A) Fusion of two nuclei called karyogamy. (B) Fusion of protoplasm between two motile or non-motile gametes. (C) Meiosis in zygote resulting in haploid spores.
A.
A → B → C
B.
B → A → C
C.
C → B → A
D.
C → A → B
Q264
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Which bacteria is utilized in Gober gas plant?
A.
Methanogens
B.
Nitrifying bacteria
C.
Ammonifying bacteria
D.
Denitrifying bacteria
Q265
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
In bacteria, plasmid is :-
A.
Extra chromosomal material
B.
Main DNA
C.
Non functional DNA
D.
Repetitive gene
Q266
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Sequence of which of the following is used to know the phylogeny :-
A.
m-RNA
B.
r-RNA
C.
t-RNA
D.
DNA
Q267
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
In five kingdom system, the main basis of classification :-
A.
Structure of nucleus
B.
Nutrition
C.
Structure of cell wall
D.
Asexual reproduction
Q268
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Organisms which obtain energy by the oxidation of reduced inorganic compounds are called
A.
Photo autotrophs
B.
Chemo autotrophs
C.
Saprozoic
D.
Coproheterotrophs
Q269
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Which one of the following bacteria has found extensive use in genetic engineering work in plants:-
A.
Clostridium septicum
B.
Xanthomonas citri
C.
Bacillus coagulens
D.
Agrobacterium tumefaciens
Q270
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
In which kingdom would you classify the archaea and nitrogen-fixing organisms, if the five-kingdom system of classification is used:-
A.
Plantae
B.
Fungi
C.
Protista
D.
Monera
Q271
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
In oogamy, fertilization involves :-
A.
A large motile female gamete and a small non–motile male gamete
B.
A small non–motile female gamete and a large motile male gamete
C.
A large non–motile female gamete and a small motile male gamete
D.
A large non–motile female gamete and a large non–motile male gamete
Q272
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Flagella of prokaryotic and eukaryotic cells differ in :-
A.
Microtubular organization and function
B.
Type of movement and placement in cell
C.
Location in cell and mode of functioning
D.
Microtubular organization and type of movement
Q273
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
If by radiation all nitrogenase enzyme are inactivated, then there will be no :-
A.
Conversion from ammonium to nitrate in soil
B.
Fixation of nitrogen in legumes
C.
Fixation of atmospheric nitrogen
D.
Conversion from nitrate to nitrite in legumes
Q274
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
A free living nitrogen–fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is :-
A.
Anabaena
B.
Tolypothrix
C.
Chlorella
D.
Nostoc
Q275
Allen
7. (B) ANALYTICAL QUESTIONS
MCQ
Carbohydrates, the most abundant biomolecules on earth, are produced by :
A.
some bacteria, algae and green plant cells
B.
all bacteria, fungi and algae
C.
fungi, algae and green plant cells
D.
viruses, fungi and bacteria