Botany
Phytochrome was discovered by:
A.
F.W. Went
B.
Garner and Allard
C.
F.F. Blackman
D.
F.E. Fritsch
The 'Lock-and-Key model' of an enzyme was proposed by:
A.
Robertson
B.
Roberts Brown
C.
Emil Fischer
D.
Daniel Kushland
The enzyme that converts glucose into ethyl alcohol is:
A.
Diastase
B.
Maitase
C.
Zymase
D.
Invertase
Stamens found in papilionaceae are:
A.
One
B.
Ten
C.
Twenty
D.
Infinite
Heteromorphic alternation of generation is found in:
A.
Mucor
B.
Spirogyra
C.
Rhizopus
D.
Selaginella
The enzyme concerned with transfer of electrons from one substance to another is:
A.
Desmolase
B.
Hydrolase
C.
Transaminase
D.
Dehydrogenase
Female gametophyte of Angiosperms is mostly:
A.
7 celled
B.
8 celled
C.
11 celled
D.
Multicelled
In coralloid roots Cycas has:
A.
Anabaena
B.
Azotobacter
C.
Rhizobium
D.
Mycorrhiza
The source of turpentine is:
A.
Sunflower
B.
Cycas
C.
Pinus
D.
Glycine
Phytochrome in plants is sensitive to:
A.
Blue light
B.
Green light
C.
Red light
D.
Red and far-red light
In CAM plants CO₂ acceptor is:
A.
RuBP
B.
PEP
C.
OAA
D.
PGA
Hormone released during stress condition is:
A.
Auxin
B.
Gibberellin
C.
Abscisic acid
D.
Ethylene
photophosphorylation was discovered by:
A.
Arnon
B.
Ruben and Kamen
C.
Robin Hill
D.
Melvin Calvin
Pigments of photosystem-I are present in:
A.
Appressed part of grana
B.
Stromal thylakoids
C.
Stromal thylakoids and non-appressed part of granal thylakoids
D.
None of these
The organelle associated with photorespiration is:
A.
Lysosome
B.
Mesosome
C.
Peroxisome
D.
Glyoxysome
Linolenic acid is an unsaturated fatty acid and its content is highest in:
A.
Coconut oil
B.
Cotton oil
C.
Groundnut oil
D.
Sunflower oil
Phospholipids are:
A.
Amphipathic
B.
Amphoteric
C.
Amorphous
D.
Hydrophobic
Chromosome complement 2n-1 is called:
A.
Monosomy
B.
Trisomy
C.
Nullisomy
D.
Tetrasomy
In chromatin, DNA is associated with highly basic proteins called:
A.
Histones
B.
Non-histones
C.
Both 'A' and 'B'
D.
None of these
Viruses cannot reproduce on its own because:
A.
It cannot reproduce at all
B.
It has underdeveloped sex organs
C.
It lacks the cellular machinery to use its genetic material
D.
None of these
The action of interferon:
A.
Lacks specificity
B.
Is only on specific virus
C.
Is only on malignant cells
D.
Is on influenza and polio viruses
Interferons are:
A.
Anticancer proteins
B.
Antiviral proteins
C.
Antibacterial proteins
D.
Complex proteins
Viruses are:
A.
Unicellular organisms
B.
Cellular without cell wall
C.
Multicellular organisms
D.
Non-cellular organisms
Viruses can multiply in:
A.
All living cells
B.
Bacteria only
C.
Specific living cells
D.
Rotten food
Antiviral substance produced by animals (or many vertebrates in response to viral infection for resisting the multiplication of viruses) is known as:
A.
Virion
B.
Antigen
C.
Interferon
D.
Repressor protein