12-botany-unit-v & Vi Plant Physiology & Biology In Human Welfare
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Prepared by Mr. D. Rajamani, M. Sc. ,M. Ed. , P. G. Asst Botany A. C. S Mat. Hr Sec. School, Arni. Tiruvannamalai Dist ; &nbs p; & www. Padasalai. Net
- 1.The term enzyme was coined by
- A.
Kuhne
- B.
Fischer
- C.
Buchner
- D.
Koshland
- 2.The lock and key theory of enzyme action was proposed by
- A.
Fischer
- B.
Kuhne
- C.
Buchner
- D.
Koshland
- 3.An example for transverase is
- A.
Transaminase
- B.
Pyruvic carboxylase
- C.
Histidine decarboxylase
- D.
G-3-P dehydrogenase
- 4.Photosynthesis takes place in
- A.
chloroplasts
- B.
Mitochondria
- C.
Peroxisomes
- D.
ribosomes
- 5.During cyclic electron transport, which one of the following is produced
- A.
ATP only
- B.
NADPH2 only
- C.
NADH2 only
- D.
both ATP and NADPH2
- 6.Which one of the following is a five carbon compound?
- A.
Ribose
- B.
DHAP
- C.
fructose
- D.
erythrose
- 7.The essential component for the formation of chlorophyll
- A.
Mg
- B.
Fe
- C.
Cl
- D.
Mn
- 8.Which one of the following is a C4 plant?
- A.
Sugarcane
- B.
Potato
- C.
Rice
- D.
Wheat
- 9.Which of the following bacterium oxidizes ammonia to nitrate
- A.
Nitrosomonas
- B.
Rhizobium
- C.
Closteridium
- D.
E. coli
- 10.The pigment which is highly efficient in absorbing solar energy is
- A.
Chlorophyll
- B.
Phycobilins
- C.
Carotinoids
- D.
Xanthophyll
- 11.Which of the following is a total parasite
- A.
Cuscuta
- B.
Viscum
- C.
Drosera
- D.
Monotropa
- 12.Which of the following wavelengths of light is most effective for photosynthesis
- A.
400 nm to 700 nm
- B.
700 nm to 900 nm
- C.
100 nm to 200 nm
- D.
200 nm to 300 nm
- 13.Dark respiration is the function of
- A.
Mitochondria
- B.
Peroxisomes
- C.
Chloroplast
- D.
Ribosome
- 14.Dark reaction is also known as
- A.
Calvin cycle
- B.
Krebs cycle
- C.
Pentosephosphate pathway
- D.
photorespiration
- 15.The gas evolved during photosynthesis is
- A.
Oxygen
- B.
hydrogen
- C.
carbondioxide
- D.
Nitrogen
- 16.C4 pathway is otherwise known as
- A.
Hatch-Slack pathway
- B.
EMP pathway
- C.
photorespiration
- D.
Electron transport chain
- 17.An example for insectivorous plant is
- A.
Drosera
- B.
Viscum
- C.
Monotropa
- D.
Vanda
- 18.Photorespiration is otherwise called as
- A.
C2 cycle
- B.
C3 cycle
- C.
C4 cycle
- D.
C5 cycle
- 19.Which of the following is regarded as primary pigment?
- A.
Chlorophyll ‘a’
- B.
Chlorophyll ‘b’
- C.
Carotenoid
- D.
Xanthophyll
- 20.The dark reactions of photosynthesis were discovered by
- A.
Melvin Calvin
- B.
Krebs
- C.
Embden and Meyer
- D.
Parnas
- 21.Which of the following is a 5C compound?
- A.
RuBP
- B.
Glucose
- C.
Fructose
- D.
Phosphoglyceric acid
- 22.In C3 plants light reactions and dark reactions occur in
- A.
Mesophyll cells
- B.
bundle sheath cells
- C.
Epidermal cells
- D.
Vascular cells
- 23.In C3 pathway acceptor molecule of CO2 is
- A.
RuBP
- B.
Phosphoenol pyruvate
- C.
PGA
- D.
DHAP
- 24.Which of the following is not a C4 plant?
- A.
Wheat
- B.
Amaranthus
- C.
Maize
- D.
Tribulus
- 25.Vanda plant is a/an ----
- A.
Epiphyte
- B.
total parasite
- C.
Partial parasite
- D.
Saprophyte
- 26.The reducing power produced in the light reaction is
- A.
NADPH2
- B.
ADP
- C.
NADP
- D.
ATP
- 27.Which one of the following plant hormones was first discovered?
- A.
Auxin
- B.
Cytokinin
- C.
Gibberellin
- D.
thylene
- 28.The photosynthetic pigments are located in
- A.
Thylakoid
- B.
Cristae
- C.
Cisternae
- D.
Stroma
- 29.The number of high energy terminal bonds present in ATP is
- A.
Two
- B.
One
- C.
Three
- D.
Four
- 30.Which of the following is the common respiratory substrate?
- A.
Carbohydrates
- B.
Vitamins
- C.
Proteins
- D.
Lipids
- 31.Cisaconitic acid is converted into isocitric acid by the addition of a molecule of water. This reaction is catalyzed by
- A.
Aconitase
- B.
Citric acid synthetase
- C.
Fumarase
- D.
Malic dehydrogenase
- 32.The first step in aerobic respiration is
- A.
Glycolysis
- B.
Krebs cycle
- C.
terminal oxidation
- D.
Cyclic photophosphorylation
- 33.Fructose 1,6-bisphosphate is cleaved to two molecules of 3 carbon compounds by
- A.
hexokinase
- B.
Aldolase
- C.
Enolase
- D.
Pyruvic kinase
- 34.Glucose is phosphorylated to glucose-6-phosphate by the enzyme
- A.
Aldolase
- B.
Enolase
- C.
pyruvic kinase
- D.
Hexokinase
- 35.Complete oxidation of one molecule of glucose yields
- A.
38 ATP
- B.
36 ATP
- C.
35 ATP
- D.
2 ATP
- 36.Oxidative decarboxylation of pyruvic acid is catalysed by
- A.
pyruvic dehydrogenase
- B.
Pyruvic kinase
- C.
pyruvic mutase
- D.
Pyruvic isomerase
- 37.A - ketoglutaric acid is a _____ carbon compound
- A.
five
- B.
Four
- C.
two
- D.
Three
- 38.Glucose is phosphorylated to glucose-6-phosphate by
- A.
Hexokinase
- B.
Mutase
- C.
Aldolase
- D.
kinase
- 39.Respiratory quotient of glucose is
- A.
Unity
- B.
zero
- C.
More than one
- D.
less than one
- 40.One molecule of FADH2 on oxidation yields
- A.
Two ATP
- B.
One ATP
- C.
Three ATP
- D.
four ATP
- 41.One molecule of NADH2 on oxidation yields
- A.
Three ATP
- B.
One ATP
- C.
Two ATP
- D.
Four ATP
- 42.Formation of ATP during electron transport chain is known as
- A.
Oxidative phosphorylation
- B.
dephosphorylation
- C.
Phtophosphorylation
- D.
Substate level phosphorylation
- 43.Which of the following is referred to as EMP pathway?
- A.
Glycolysis
- B.
Krebs cycle
- C.
Electron transport chain
- D.
Pentose phosphate pathway
- 44.The total amount of energy released from one molecule of glucose on oxidation is about
- A.
2900 kJ
- B.
2500 kJ
- C.
1600 kJ
- D.
2300 kJ
- 45.Which of the following is a 5C compound?
- A.
Xylulose phosphate
- B.
Sedoheptulose phosphate
- C.
Phosphoglyceraldehyde
- D.
Erythrosephosphate
- 46.An example for synthetic auxin is
- A.
NAA
- B.
IAA
- C.
PAA
- D.
ABA
- 47.Apical dominance is due to
- A.
Auxin
- B.
Cytokinin
- C.
Gibberellin
- D.
Ethylene
- 48.Bakanae disease in paddy is caused by
- A.
Gibberellic acid
- B.
Naphthelene acetic acid
- C.
Abscissic acid
- D.
Phenyl acetic acid
- 49.Auxin prevents
- A.
abscission
- B.
Apical dominance
- C.
Ageing process
- D.
parthinocarpy
- 50.In sigmoid curve the rapid growth phase is designated as
- A.
Log phase
- B.
lag phase
- C.
Dormant phase
- D.
Steady state phate
- 51.“Foolish seedling” disease of rice is caused by
- A.
Gibbrellins
- B.
Auxin
- C.
Abscisic acid
- D.
cytokinin
- 52.Closure of stomata is caused by
- A.
abscisic acid
- B.
Auxin
- C.
Gibbrellins
- D.
Cytokinin
- 53.The chemical used in the field to eradicate weeds is
- A.
2, 4 - D
- B.
IAA
- C.
ABA
- D.
Urea
- 54.Abscission is prevented by
- A.
Auxin
- B.
Gibberellin
- C.
Cytokinin
- D.
Ethylene
- 55.Which of the following is a gaseous hormone?
- A.
Ethylene
- B.
Kinetin
- C.
Zeatin
- D.
Auxin
- 56.Which of the following is natural auxin found in higher plants?
- A.
IAA
- B.
GA
- C.
2,4,D
- D.
Zeatin
- 57.Photoperiodic response in flowering was first observed in
- A.
Maryland Mammoth
- B.
Wheat
- C.
Oats
- D.
Chrysanthemum
- 58.The response of a plant to the relative lengths of light and dark periods is known as
- A.
Photorespiration
- B.
vernalization
- C.
Photosynthesis
- D.
Photoperiodism
- 59.Which of the following is a short day plant?
- A.
Tobacco
- B.
Wheat
- C.
Sunflower
- D.
Maize
- 60.Which pathogen causes the blast disease of rice?
- A.
Pyricularia oryzae
- B.
Cercospora personata
- C.
Xanthomonas citri
- D.
Tungro virus
- 61.Which of the following is a long day plant?
- A.
wheat
- B.
Maize
- C.
Tobacco
- D.
Sunflower
- 62.Which pathogen causes Tikka disease of groundnut?
- A.
Cercospora personata
- B.
Pyricularia oryzae
- C.
Xanthomonas citri
- D.
Tungro virus
- 63.Acalyphine is extracted from
- A.
Acalypha indica
- B.
Aegle marmelos
- C.
Cissus quadrangularis
- D.
Mimosa pudica
- 64.Binomial of ‘vilvum’ is
- A.
Aegle marmelos
- B.
Acalypha indica
- C.
Cissus quadrangularis
- D.
Mimosa pudica
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