A characteristic of drupe is
1.fleshy seed coat
2.stony pericarp
3.stony mesocarp
4. stony endocarp
Posted Date:-2021-12-24 14:57:22
Aleurone layer takes part in
1.protection of delicate embryo
2.enzyme synthesis
3.transfer of food to cotyledons
4. transfer of food from cotyledons to embryo tips
Posted Date:-2021-12-24 14:56:33
Angiosperm pollen is generally released at the
1. 1 – celled stage
2.2 – celled stage
3.3 – celled stage
4. male gamete formation stage
Posted Date:-2021-12-24 14:46:42
Assertion (A): K+ ion accumulation found in Nitella depends on its respiratory activity. Reason (R): Absorption of all ions in plants completely depends on the usage of metabolic energy. The correct answer is
1.A and R are true and R is the correct explanation of A
2.A and R are true but R is not the correct explanation of A
3.A is true but R is false
4. A is false but R is true
Posted Date:-2021-12-24 13:34:25
Besides water and CO2, which is more essential a raw material for food formation
1. light
2.oxygen
3.NAD
4.mineral salt
Posted Date:-2021-12-24 13:58:58
Cells shrink in _________ solution.
1.isotonic
2.hypotonic
3.hypertonic
4.hypotonic and hypertonic
Posted Date:-2021-12-24 13:23:52
Chlorosis will occur if a plant is grown in
1.dark
2.shade
3. strong light
4.Fe – free medium
Posted Date:-2021-12-24 13:40:36
Choose the correct function of magnesium.
1. It is a constituent of several coenzyme.
2. It activates the enzymes of respiration and photosynthesis.
3. It activates enzyme catalase
4.It helps in maintaining anion-cation balance.
Posted Date:-2021-12-24 13:41:27
Choose the correct sequence of water movement in the plants.
1. Cortex, protoxylem, endodermis, root hair, pericycle, metaxylem
2.Root hair, cortex, endodermis, pericycle, protoxylem, metaxylem
3.Root hair, protoxylem, metaxylem, pericycle, cortex, endodermis
4.Root hair, pericycle, endodermis, cortex, protoxylem, metaxylem
Posted Date:-2021-12-24 13:28:49
Choose the correct statement/statements. Pumps in active transport are A. Lipids that bind molecules to pass them through the membrane. B. Transport molecules uphill. C. These are specific transporters. D. These are sensitive to inhibitors.
1.A and C
2. A, B and D
3.B, C and D
4.C and D
Posted Date:-2021-12-24 13:18:56
Cohesion theory of water movement in plants was put forth by
1.Henry Dixon
2.F. F. Blackman
3.Melvin cycle
4. Hans. A. Krebs
Posted Date:-2021-12-24 13:30:12
Complete the reaction. _________ + O2 → CO2 + _______ + Energy
1.C6H12O6, 2H2O
2.C12H22O11, 6H2O
3.C6H12O6, 6H2O
4.C12H22O11, 11H2O
Posted Date:-2021-12-24 14:53:31
Diffusion rate is affected by
1.temperature
2. membrane permeability
3.gradient of concentration
4.All of these
Posted Date:-2021-12-24 13:23:01
Discovery of Emerson effect has already shown the
1. two distinct photochemical reactions
2.light and dark reactions of photosynthesis
3.photophosphorylation
4.photorespiration
Posted Date:-2021-12-24 14:00:29
Dry seeds kept in water swell due to
1.absorption
2.diffusion
3.imbibition
4.None of these
Posted Date:-2021-12-24 13:18:00
End product of glycolysis is
1.acetyl Coenzyme A
2.PEP
3.pyruvate
4.OAA
Posted Date:-2021-12-24 15:00:09
Exanthema is due to deficiency of
1. B
2.Mo
3.Mn
4.Cu
Posted Date:-2021-12-24 13:51:33
Exponential growth of the plants is express as W1 = W0 ert r represents
1.ability of the plant to produce new cells
2.efficiency index
3.relative growth rate
4.All of the above
Posted Date:-2021-12-24 15:05:53
Function of zinc is
1.Closing of stomata
2.Biosynthesis of 3-IAA
3. Synthesis of chlorophyll
4.Oxidation of carbohydrate
Posted Date:-2021-12-24 13:36:44
Herkogamy is a contrivance for
1.allogamy
2.autogamy
3.chasmogamy
4.cleistogamy
Posted Date:-2021-12-24 14:51:44
If pressure greater than atmospheric pressure is applied to pure water, the water potential
1.increases
2.decreases
3.remains same
4. atmospheric pressure does not affect water potential
Posted Date:-2021-12-24 13:27:04
In actively gro – wing young plants, the best data for estimating the rate of photosynthesis would be
1.ratio of oxygen evolved to carbon dioxide absorbed
2.increase in fresh weight
3. increase in dry weight
4.increase in carbohydrate
Posted Date:-2021-12-24 13:59:48
In plants, a common symptom caused by deficiency of P, K, Ca and Mg is the
1.bending of leaf tip
2.formation of anthocyanins
3.poor development of vasculature
4.appearance of dead necrotic tissue
Posted Date:-2021-12-24 13:35:56
Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is know as
1. TCA pathway
2.Glycolysis
3.Hms pathway
4.Glycolysis
Posted Date:-2021-12-24 14:58:57
Insectivorous plants grow where
1. There is carbohydrate deficient soil
2.There is nitrogen deficient soil
3.Vitamin c is required
4.Hormones are required
Posted Date:-2021-12-24 13:48:13
Ψs is always
1.positive
2.zero
3.negative
4.one
Posted Date:-2021-12-24 13:21:32
Kranz anatomy is a feature of
1.C3 plants
2.CAM plants
3.C4 plants
4.All of these
Posted Date:-2021-12-24 14:04:56
Light reactions of photosynthesis occurs in
1. stroma
2.thylakoid
3.grana
4.cytoplasm of cell
Posted Date:-2021-12-24 14:07:35
Malacophily means
1.pollination by wind
2.pollination by water
3.pollination by insects
4.pollination by snails
Posted Date:-2021-12-24 14:51:10
Manganese is required in
1.Chlorophyll synthesis
2. Nucleic acid synthesis
3.Plant cell wall formation
4.Photolysis of water during photosynthesis
Posted Date:-2021-12-24 13:57:18
Manganese toxicity leads to deficiency of
1. iron
2.calcium
3.magnesium
4.All of the above
Posted Date:-2021-12-24 13:39:56
Mineral salts which are absorbed by the roots from soil are in the form of
1.Dilute solution
2.Very concentrated solution
3.Concentrated solution
4.Very dilute solution
Posted Date:-2021-12-24 13:42:24
NPK denotes
1.Nitrogen, Protein, Kinetin
2.Nitrogen, Protein, Potassium
3.Nitrogen, Potassium, kinetin
4.Nitrogen, Phosphorus, Potassium
Posted Date:-2021-12-24 13:52:19
One molecule of glucose yields ___ ATP molecules in aerobic respiration.
1.2
2.16
3.38
4.42
Posted Date:-2021-12-24 15:02:27
Opening of floral buds into flowers, is a type of:
1.Autonomic movement of variation
2.Autonomic movement of locomotion
3.Autonomic movement of growth
4.Paratonic movement of growth
Posted Date:-2021-12-24 15:06:34
Out of 36 ATP molecules produced per glucose molecule during respiration
1.2 are produced outside glycolysis and 34 during repiratory chain
2. 2 are produced outside mitochondria and 34 inside the mitochondria
3.all the formed inside mitochondria
4.2 during glycolysis and 34 during kreds cycle
Posted Date:-2021-12-24 14:52:43
Oxygen scavangers present in root nodules of legumes is
1. haemoglobin
2. leg haemoglobin
3.cyano haemoglobin
4.None of these
Posted Date:-2021-12-24 13:44:06
Phytotron is meant for
1.Controlled humidity
2.Induction of mutations
3.Controlled irradiation
4.Growing plants under controlled environment
Posted Date:-2021-12-24 13:49:05
Plants grow throughout their life due to
1.presence of meristems
2.presence of vascular cambium
3.presence of xylem and phloem
4.presence of tracheids
Posted Date:-2021-12-24 15:08:03
Presence of phosphorus
1.brings about healthy root growth
2. promotes fruit ripening
3.retards protein formation
4.None
Posted Date:-2021-12-24 13:50:20
R.Q is ratio of
1. CO2 produced to substarate consumed
2. CO2 produced to O2 consumed
3.oxygen consumed to CO2 produced
4. oxygen consumed to water produced
Posted Date:-2021-12-24 14:45:45
Respiratory quotient of carbohydrates is
1.0.9
2.1.2
3.1
4.0
Posted Date:-2021-12-24 15:01:04
TCA cycle was discovered by
1.Otto Meyerhof
2.Hans Kreb
3.Gustav Embden
4.All of these
Posted Date:-2021-12-24 14:49:52
The complete oxidation of pyruvate take place in
1. cell cytoplasm
2. inner mitochondrial membrane
3.mitochondrial matrix
4.nucleus
Posted Date:-2021-12-24 14:47:25
The end product of the Calvin cycle is ______.
1.RuBP
2.PGAL
3.PGA
4. ADP + NADP
Posted Date:-2021-12-24 13:54:36
The final electron acceptor in electron transport chain is
1.Cytochrome C
2.FADH
3.NADH
4.oxygen
Posted Date:-2021-12-24 14:54:54
The formation of first stable product of nitrogen fixation is catalysed by enzyme
1.dehydrogenase
2.nitrogenase
3.isomerase
4.None of these
Posted Date:-2021-12-24 13:39:02
The law of limiting factor was given by
1.Calvin
2.Blackman
3.Priestley
4.None of these
Posted Date:-2021-12-24 13:55:52
The primary carbon dioxide acceptor in C4 cycle is
1.malic acid
2.phosphoenol pyruvate
3.rubisco
4. aspartic acid
Posted Date:-2021-12-24 13:55:20
The process of conversion of NO2– to N2 is called
1.nitrification
2.ammonification
3.denitrification
4.nitrogen fixation
Posted Date:-2021-12-24 13:38:15
The rate of photosynthesis is controlled by
1.he rate of light reaction
2.the rate of dark reaction
3. the rates of both light and dark reactions
4.None of these
Posted Date:-2021-12-24 13:53:31
The significant morphological feature of passion flower is the presence of
1.numerous corolla
2.androphore
3.gynophore
4.androgynophore
Posted Date:-2021-12-24 14:54:15
To prevent over – ripening, bananas should be
1.given a dip in ascorbic acid
2.maintained at room temperature
3.refrigerated
4. stored at the top of refrigerator
Posted Date:-2021-12-24 15:09:46
Toxicity of which element leads to the appearance of brown spots on leaves
1.Mg
2.Mn
3.Fe
4.Cu
Posted Date:-2021-12-24 13:49:39
Translocation of sugar in flowering plants occurs in the form of
1. glucose
2.sucrose
3.starch
4.maltose
Posted Date:-2021-12-24 14:01:11
Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will be:
1.No movement of water
2.Movement of water from cell B to A
3. Movement of water from cell A to B
4.Equilibrium between the two
Posted Date:-2021-12-24 13:20:20
Two types of molecules cross the membrane in the same direction, it is called as
1.Uniport
2.Symport
3.Antiport
4.Multiport
Posted Date:-2021-12-24 13:22:13
Typical plant growth shows _________ curve
1.J-shaped
2. S-shaped
3.I-shaped
4.Parabolic
Posted Date:-2021-12-24 15:05:06
Water stress causes
1.opening of stomata
2. increase in metabolic rate
3.wilting of leaves
4. lesser availability of carbon dioxide
Posted Date:-2021-12-24 14:08:28
When a plant is girdled (ringed)
1.the root and shoot die at the same time
2.neither root nor shoot will diet first
3.the root dies first
4.neither root nor shoot will die
Posted Date:-2021-12-24 13:32:31
Where are thylakoids and grana located?
1.Lysosomes
2.Mitochondria
3.Chloroplasts
4.Golgi apparatus
Posted Date:-2021-12-24 14:01:53
Which element is required for opening and closing of stomata?
1. P
2.K
3.Ca
4.Na
Posted Date:-2021-12-24 13:50:54
Which enzyme catalyses the reaction below? Pyruvic acid → Carbon dioxide + Ethanol
1.Pyruvic acid decarboxylase
2.Alcohol dehydrogenase
3.None of these
4.Both of these
Posted Date:-2021-12-24 14:49:00
Which of the following acts as mobile carrier for transfer of electrons between complex III and complex IV?
1.Cytochrome c
2.cytochrome a3
3. cytochrome a
4.FADH2
Posted Date:-2021-12-24 14:55:41
Which of the following is a 4-carbon compound?
1.Oxaloacetic acid
2.Phosphoglyceric acid
3.Ribulose biphosphate
4.Phosphoenolpyruvate
Posted Date:-2021-12-24 14:05:53
Which of the following is a group of micronutrients?
1.Ca, Zn, B
2. Fe, Mn, Cu
3.Cl, C, Ca
4.Ni, Mo, H
Posted Date:-2021-12-24 13:37:27
Which of the following is decreased during increase in humidity in the atmosphere?
1.Transpiration
2.Photosynthesis
3.Respiration
4.Glycolysis
Posted Date:-2021-12-24 13:20:56
Which of the following is not a macronutrient
1.iron
2.calcium
3.manganese
4.phosphorus
Posted Date:-2021-12-24 13:46:26
Which of the following is not an accessory pigment?
1. Carotene
2.Chlorophyll a
3. Chlorophyll b
4.Xanthophyll
Posted Date:-2021-12-24 13:58:19
Which of the following is the unit of ψ?
1. Pascal
2.Joule
3.Newton
4.Electron volt
Posted Date:-2021-12-24 13:19:33
Which of the following is true about diffusion?
1.There is no expenditure of energy.
2.Molecules move in Brownian motion
3.Substances moves from the region of higher concentration to the region of lower concentration.
4.Diffusion depends on the type of living system.
Posted Date:-2021-12-24 13:24:43
Which of the following process (C4 cycle) occurs in bundle sheath cells?
1.Regeneration
2.Fixation
3.Carboxylation
4.Decarboxylation
Posted Date:-2021-12-24 14:06:39
Which one of the following describes the spikelet of a cereal or grass plant
1.inferior ovary
2.dehiscent fruit
3.pair of glumes
4. fused calyx
Posted Date:-2021-12-24 14:50:31
Which one of the following is not a micronutrient?
1.Magnesium
2.Molybdenum
3.Boron
4.Zinc
Posted Date:-2021-12-24 13:45:23
Which one of the following mineral elements plays an in biological nitrogen fixation?
1.Copper
2.Manganese
3.Zinc
4.Molybdenum
Posted Date:-2021-12-24 13:43:03
Which one of the following statement is true for ATP?
1.ATP is prosthetic part of an enzyme
2.ATP is an enzyme
3.ATP is organic ions of enzyme
4.ATP is a Co-enzyme
Posted Date:-2021-12-24 14:03:47
Which one of the followings is a gaseous plant hormone?
1.Ethylene
2.Gibberellin
3.IAA
4. Abscisic acid
Posted Date:-2021-12-24 15:09:03
Who enunciated the law of limiting factor for photosynthesis?
1.Robert Emerson
2.Ruben
3.Blackman
4.Calvin
Posted Date:-2021-12-24 14:02:30
Who enunciated the law of limiting factor for photosynthesis?
1.Robert Emerson
2.Ruben
3.Blackman
4.Calvin
Posted Date:-2021-12-24 14:02:59
Wilting of a plant results from excessive
1.respiration
2.photosynthesis
3.absorption
4.transpiration
Posted Date:-2021-12-24 13:29:24