16059.85-90% (9/10) of all photosynthesis in the world is carried out by
Shrubs
Algae of the oceans
Herbs
Scientists in the laboratory
16060.As compared to a C3-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C4 plants
Zero
Two
Six
Twelve
16061.A process that makes important difference between C3 and C4 plants is
Transpiration
Photorespiration
Photosynthesis
Glycolysis
16062.A plant with low CO2 compensation point is:
Gossypium hirsutum
Leucopoa kingii
Atriplex patula
Tidestromia Oblongifolia
16063.Which one of the following is not true about the light reactions of photosynthesis?
NADPH is not produced in cyclic electrons transport in light reactions.
The flow of electrons from water to NADP in non-cyclic electron transport produces one ATP
Reactions of the two photosystems are needed for the reduction of NADP
P680 and P700 are the reaction centres of PS I an PS II respectivelyreactions
16064.Which of the following statements regarding C4 plants is false?
The primary CO2 acceptor is a 5 carbon molecule
The initial carboxylation reaction occurs in mesophyll
The leaves that fix CO2 have two cell types
The mesophyll cells lack RuBisCO enzyme
16065.Which of the following is WRONGLY matched?
Sorghum – Kranz anatomy
PEP carboxylase – Mesophyll cells
Blackman – Law of limiting factors
PS II – P700
16066.The synthesis of one molecule of glucose during Calvin cycle requires
6 molecules of ATP and 12 molecules of NADPH2
12 molecules each of ATP and NADPH2
12 molecules of ATP and 18 molecules of NADPH2
18 molecules of ATP and 12 molecules of NADPH2
16067.The pathway that will produce oxygen during photosynthesis is:
electron transport pathway
noncyclic electron pathway
light-independent reactions
cyclic electron pathway
16068.The net requirement of assimilator power for the formation of 6 hexose molecules in maize plant is
180 ATP, 72 NADPH
108 ATP,72 NADPH
90 ATP, 60 NADPH
72 ATP, 48 NADPH
16069.
Read the following four statements, A, B, C and D and select the right option having both correct statements.
STATEMENTS:
(A) Z scheme of light reaction takes place in presence of PS I only.
(B) Only PS I is functional in cyclic photophosphorylation.
(C) Cyclic photophosphorylation results into synthesis of ATP and NADPH2
(D) Stroma lamellae lack PS II as well as NADP. Options :
B and D
A and B
B and C
C and D
16070.A photosynthesizing plant is releasing 18O more than the normal. The plant must have been supplied with
O3
H2O with 18O
CO2 with 18O
C6HO6 with 18O
16071.Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because
Effective pumping of CO2 into bundle sheath cells
Rubisco in C4 plants has higher affinity for CO2
Four carbon acids are the primary initial CO2 fixation products
The primary fixation of CO2 is mediated via PEP carboxylase
16072.Photosynthesis takes place
Only in green light
Only in sunlight
In visible light obtained from any source
Only in high intensity of light
16073.Which one of the following is wrong in relation to photorespiration:
It is a characteristic of C4 plants
It is a characteristic of C3 plants
It occurs in daytime only
It occurs in chloroplasts
16074.Best defined function of Manganese in green plants is
Photolysis of water
Water absorption
Nitrogen fixation
Calvin cycle
16075.The enzyme responsible for primary carboxylation in C3 plants is
Pyruvate carboxylase
Succinic dehydrogenase
Hexokinase
RuBP carboxylase oxygenase
16076.In C3 plants, the first stable compound formed after CO2 fixation is
Oxaloacetic acid
Malic acid
Phosphoglyceraldehyde
3-phosphoglycerate
16077.Chemiosmosis hypothesis given by Peter Mitchel proposes the mechanism of
synthesis of NADH
synthesis of ATP
synthesis of FADH2
synthesis of NADPH
16078.The ratio between 2-carbon and 3-carbon intermediates having —NH2 group formed in photosynthetic oxidation cycle is:
1 : 1
2 : 1
3 : 2
3 : 4
16079.The first step in photosynthesis is the
Joining of 3-carbon atom to form Glucose
Formation of ATP
Ionization of water
Excitement of an electron of chlorophyll by photon of light
16080.In sugarcane plant, 14CO2 is fixed in malic acid, in which the enzyme that fixes CO2 is:
Ribulose phosphate kinase
Phosphoenolpyruvic acid carboxylase
Ribulose biphosphate carboxylase
Fructose phosphatase
16081.In higher plants, continuity of cytoplasm from one cell to its neighbouring cells is established through
Apoplast
Chloroplast
Leucoplast
Symplast
16082.Ganong's respiroscope is used to demonstrate
production of carbon dioxide during aerobic respiration.
evolution of carbon dioxide during fermentation.
evolution of oxygen during photosynthesis.
production of heat during aerobic respiration.
16083.
Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (a - e) make it useful as a storage material?
(a) Easily translocated
(b) Chemically non-reactive
(c) Easily digested by animals
(d) Osmotically inactive
(e) Synthesized during photosynthesis
The useful properties are:
(a) and (e)
(b) and (c)
(b) and (d)
(a), (c) and (e)
16084.Match the phenomenon listed under column I with those listed under column II. Select the correct answer from the options given.
| Column I | Column II | ||
| A | Warburg effect | p | Change in gene frequency by chance |
| B | Pasteur effect | q | Postponing severance in the leaves by applying cytokinin |
| C | Emerson effect | r | Decline in the consumption of respiratory substrate due to a change from anaerobic to aerobic respiration |
| D | Wright effect | s | Inhibitory effect of O2 on photosynthesis |
| t | Enhancement of photosynthesis by subjecting chlorophyll to the effect two different wavelengths of light |
A = s, B = t, C = q, D = r
A = s, B = r, C = t, D = p
A = t, B =s, C = p, D = q
A= t, B = r, C = p, D = s
16085.
Assertion: Rhoeo leaves contain anthocyanin pigments in epidermal cells.
Reason: Anthocyanins are accessory photosynthetic pigments.
Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
Assertion and Reason are true but the Reason is not the correct explanation of the Assertion
Assertion is true statement but Reason is false
Assertion and Reason are false statements
16086.Photo-oxidation or photolysis of water (in photosynthesis ) occurs in association of
Cytochrome B6
Plastocyanin
PSII
PSI
16087.Photosynthesis cannot continue for long if during light reaction, only cyclic photophosphorylation takes place. This is because
Only ATP is formed NADPH+ + H+ is not formed
There is no evolution of O2
There is unidirectional cyclic movement of the electrons
Photosystem I stops getting excited at a wavelength of light beyond 680 nm
16088.______ ions help in photolysis of water.
Mn++
Mg++
Cl-
both 1 and 3
Explanation:
Magnoprotein is associated with photolysis of water, which contains Mn++ and Cl- as cofactor.
Magnoprotein is associated with photolysis of water, which contains Mn++ and Cl- as cofactor.
16089.RUBISCO enzyme is also called as ______.
carboxytetra mutase
carboxydimutase
carboxytrimutase
carboxyunimutase
Explanation:
RUBISCO is called marker enzyme of chloroplast since it can perform carboxylation as well as oxidation, therefore also called carboxydimutase.
RUBISCO is called marker enzyme of chloroplast since it can perform carboxylation as well as oxidation, therefore also called carboxydimutase.
16090.______ is precursor for abscissic acid (ABA)
Zeatin
Lutein
Violaxanthin
Mevalonic acid
Explanation:
Precursor for the biosynthesis of abscissic acid is violaxanthin, a type of xanthophyll found in leaves.
Precursor for the biosynthesis of abscissic acid is violaxanthin, a type of xanthophyll found in leaves.
16091.In young leaves ratio of carotene to Xanthophyll is ____.
2 : 1
3: 1
1: 3
1: 2
Explanation:
In young leaves cuticle is thin hence require more production therefore concentration of Xanthophyll is more than carotene which is more protective.
In young leaves cuticle is thin hence require more production therefore concentration of Xanthophyll is more than carotene which is more protective.
16092.Which of the following pigments contains open pyrolle ring?
Phycobilins
Xanthophylls
Chlorophylls
β-carotene
Explanation:
Chlorophylls are made of closed pyrolle, whereas Phycobilins are made of open pyrolle, Carotenoids are carbon hydrogen derivatives.
Chlorophylls are made of closed pyrolle, whereas Phycobilins are made of open pyrolle, Carotenoids are carbon hydrogen derivatives.
16093.Quantum yield of photosynthesis is ______.
13.5 %
8 %
13%
12.5%
Explanation:
Quantum requirement of photosynthesis is 8 quanta, whereas quantum yield is /8 x 00 i.e., .5%
Quantum requirement of photosynthesis is 8 quanta, whereas quantum yield is /8 x 00 i.e., .5%
16094.During light phase of photosynthesis ______ is oxidized and ______ is reduced.
CO2 and Water
Water and CO2
Water and NADP
NADPH2 and CO2
Explanation:
During light phase water is oxidized and the released hydrogen is accepted by NADP, hence is reduced to NADPH2.
During light phase water is oxidized and the released hydrogen is accepted by NADP, hence is reduced to NADPH2.
16095.During dark phase of photosynthesis ______ is oxidized and ______ is reduced
CO2 and Water
Water and CO2
Water and NADP
NADPH2 and CO2
Explanation:
During dark phase the reduced NADPH2 transfer its hydrogen to CO2 which is reduced to carbohydrate.
During dark phase the reduced NADPH2 transfer its hydrogen to CO2 which is reduced to carbohydrate.
16096.The visible product of photosynthesis is ______.
glucose
cellulose
starch
fructose
Explanation:
Starch is visible product since it can be stained with iodine.
Starch is visible product since it can be stained with iodine.
16097.To produce 3 glucose molecules ______ ATP and ______ NADPH2 molecules are required.
54, 36
54, 30
36, 60
18, 12
Explanation:
glucose molecule requires 18 ATP and 12 NADPH2
glucose molecule requires 18 ATP and 12 NADPH2
16098.If a photosynthsing plant releases 18O, it is concluded that the plant has been supplied with
Water containing 18O
Oxygen in the form of ozone
Sugar containing 18O
Carbon dioxide containing 18O
16099.For synthesis of a molecule of glucose, the requirement of ATP and NADPH is respectively
15 and 10
33 and 22
12 and 8
18 and 12
16100.Glycolytic reversal is a part of ______.
aerobic respiration
anaerobic respiration
light phase of photosynthesis
dark phase of photosynthesis
Explanation:
First phase of calvin cycle is called glycolytic reversal, which is a part of dark phase of photosynthesis.
First phase of calvin cycle is called glycolytic reversal, which is a part of dark phase of photosynthesis.
16101.RuBp carboxylase acts as RuBp carboxygenase at ______ CO2 conc. and ______ O2 conc.
low, low
low, high
high, high
high, low
Explanation:
During photorespiration RUBP carboxylase acts RUBP oxygenase under low CO2 High O2 concentrations.
During photorespiration RUBP carboxylase acts RUBP oxygenase under low CO2 High O2 concentrations.
16102.Dicot which follow C4 pathway is____.
wheat
Amranthus
Maize
Mango
Explanation:
Most of the C4 plant is monocot however exceptional dicot is Amaranthus.
Most of the C4 plant is monocot however exceptional dicot is Amaranthus.
16103.Absorption spectrum of chlorophyll is maximum in _____ light.
red
blue
yellow
blue-violet
Explanation:
Absorption spectrum of chlorophyll is maximum in blue light whereas action spectrum is maximum in red light.
Absorption spectrum of chlorophyll is maximum in blue light whereas action spectrum is maximum in red light.
16104.The oxygen molecule in glucose formed during photosynthesis comes from
Water
Organic acids
CO2
atmosphere
Explanation:
Since glucose is formed form CO2 and hydrogen released from water hence oxygen comes from CO2.
Since glucose is formed form CO2 and hydrogen released from water hence oxygen comes from CO2.
16105.Dimorphic chloroplast are present in ______.
zeamays
sacchrum officinale
sorghum bicolor
all of these
Explanation:
Dimorphic chloroplast or Kranz anatomy is the character feature of monocot, All the given options are monocot.
Dimorphic chloroplast or Kranz anatomy is the character feature of monocot, All the given options are monocot.
16106.Red pigment in tomato is
b-carotene
Anthocyanin
Lycopene
Lutein
Explanation:
the biological name of the tomato is Lycopersicon esculentum it is due the ther lycopene.
the biological name of the tomato is Lycopersicon esculentum it is due the ther lycopene.
16107.Solarisation refers to ______.
formation of sugar with help of water or energy
destruction of chlorophyll
synthesis of chl.
both b and c
Explanation:
Destruction of chlorophyll is due harmful light and oxygen called solarization.
Destruction of chlorophyll is due harmful light and oxygen called solarization.