The growth curve of bacterial population in lab is plotted against time. What will be the shape of graph?
(1) Sigmoid
(2) Hyperbolic
(3) Ascending straight line
(4) Descending straight line
Difficulty Level:
The outermost limiting layer of mycoplasma is made up of
(1) cell wall
(2) cell membrane
(3) mucilaginous sheath
(4) slime layer
Concept Questions :-
Difficulty Level:
By all of the following ways bacteria become resistant to antibiotic except
(1) making enzymes that inactivate the drug
(2) becoming impermeable to the drug
(3) modifying the target of the drug
(4) moving away from the drug.
Difficulty Level:
Protista differs from monera in having
(1) cell wall
(2) autotrophic nutrition
(3) flagella
(4) nuclear membrane
Concept Questions :-
Difficulty Level:
Which of the following is correct?
(1) All fungi are filamentous.
(2) Transfer of DNA from one bacteria to another bacteria cannot take place.
(3) Virus cannot have both DNA and RNA.
(4) Protists reproduce asexually only.
Concept Questions :-
Difficulty Level:
Kingdom Animalia is characterised by
(1) direct dependence on autotrophs
(2) indirect dependence on autotrophs
(3) absence of chlorophyll
(4) absence of cell wall
Concept Questions :-
Difficulty Level:
Deuteromycetes are known as fungi imperfecti because
(1) their zygote undergoes meroblastic and holoblastic cleavage
(2) only asexual stages are known
(3) they have aseptate mycelium
(4) they are autotrophic
Concept Questions :-
Difficulty Level:
The genetic material in tobacco mosaic virus is
(1) ss DNA
(2) ss RNA
(3) ds RNA
(4) ds DNA
Concept Questions :-
Difficulty Level:
Yeast is not included in protozoans but in fungi because
(1) it has chlorophyll
(2) it shows saprotrophic mode of nutrition
(3) it has eukaryotic organisation
(4) cell wall is made up of cellulose and reserve food material as starch.
Concept Questions :-
Difficulty Level:
Identify the labelled part in the given figure and select the correct option.
|
A |
B |
(1) |
Heterocyst |
Mucilaginous sheath |
(2) |
Mucilaginous sheath |
Heterocyst |
(3) |
Heterocyst |
Capsid |
(4) |
Pseudopodia |
Mucilaginous sheath |
Concept Questions :-
Difficulty Level: