Biology/Plant anatomy Sample Test,Sample questions

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Question: α-Ketoglutarate dehydrogenase brings about

1.Oxidation and decarboxylation

2.Reduction

3.Oxidation

4.Decarboxylation

Question: 2,4-D causes ...

1.Delay in senescence

2.Bolting

3.Increase in branches

4.Increased growth of all parts

Question: 2,4-D causes ...

1.Delay in senescence

2.Bolting

3.Increase in branches

4.Increased growth of all parts

Question: A chemical believed to be involved in flowering is ... .

1.Gibberellin

2.Kinetin

3.Florigen

4.IBA

Question: A semipermeable membrane allows the diffusion of

1.Solutes

2.Solvents

3.Both solutes and solvents

4.None of the above

Question: Ability of Venus Fly Trap to capture insects is due to ...

1.Specialised "muscle-like" cells

2.Chemical stimulation by prey

3.Rapid turgor pressure changes

4.Passive process requiring no special ability on the apart of the pant

Question: Active transport occurs

1.Against concentration gradient and requires ATP

2.Against concentration gradient but does not require ATP

3.Along concentration gradient but requires ATP

4.Along concentration gradient but does not require ATP

Question: All of the following are plant growth inhibitors except;

1.ABA

2.Dormin

3.Ethylene

4.IAA

Question: An essential element is that which

1.Is found in plant ash

2.Is available in soil

3.Improves health of plant

4.Is irreplaceable and indispensable for growth of plants

Question: Apical dominance is caused by ...

1.Abscisic acid in lateral bud

2.Cytokinin in leaf tip

3.Gibberellin in lateral buds

4.Auxin in shoot tip

Question: Arithmetic growth curve is linear because

1.One daughter cell remains meristematic and others differentiates and mature

2.Both daughter cells remains meristematic

3.) Both daughter cells get matured

4.None of the above

Question: As compared to anaerobic respiration, the energy gained during aerobic respiration is

1.8 times

2.14 times

3.15times

4.19 times

Question: Assertion Dried seeds of Pea are kept in tin, water is poured over them up to upper level. A lid is put tight over it. Within an hour the lid is blown off Reason Due to rapid cell division in Pea see

1.If both the assertion and reason are true and reason explains the assertion

2.If both the assertion and reason are true but reason does not explain the a

3.If assertion is true but reason is false

4.If assertion is false but reason is true.

Question: Assertion: Nitrogen fixing bacteria of legume root nodules survive in oxygen depleted cells. Reason: Leghaemoglobin completely removes oxygen from nodule cells

1.If both the assertion and reason are true and reason explains the assertion

2.If both the assertion and reason are true but reason does not explain the a

3. If assertion is true but reason is false

4. If assertion is false but reason is true.

Question: ATP is

1.Adenine triphosphate

2.Adenine tetraphosphate

3.Adenosine tetraphosphate

4.None of the above

Question: Auxins are mainly produced by

1.Root apical meristem

2.Shoot apical meristem

3.Lateral meristem

4.Intercalary meristem

Question: Bacteria that convert ammonia to nitrite belong to

1.Nitrosomonas

2.Nitrobacter

3.Mycobacterium

4.Pseudomonas

Question: Biennials get changed into annuals by ...

1.Hormones

2.Photoperiodism

3.Grafting

4.Vernalisation

Question: Bioassay for auxin is ..

1.) Dwarf maize test

2.Avena curvature test

3.Cell division test

4.Green leaf test

Question: Brown heart disease is due to deficiency of

1.Boron

2.Iron

3.Potassium

4.Molybdenum

Question: Bulliform cells in Grass leaves show

1.Growth movements

2.Tropic movements

3.Nastic movements

4.Turgor movements

Question: C4 plants differ from C3 plants with respect to

1.Substrate which accepts carbon dioxide

2.First product

3.Number of ATP molecules consumed

4.All of the above

Question: Carbohydrates, the most abundant biomolecules on earth are produced by

1.Some bacteria, algae and green plants

2.Fungi, algae and green plants

3.Viruses, fungi and bacteria

4.All bacteria, fungi and algae

Question: Cell respiration is carried out by

1.Ribosomes

2.Golgi bodies

3.Mitochondria

4.Chloroplasts

Question: Choose the wrong pair:

1.Auxin - to grow

2.Gibberllin - acidic

3.Caytokinin - cell divisen

4.ABA - Flowring hormons

Question: Compensation point is the value of a factor where there is

1. Beginning of photosynthesis

2. Little photosynthesis

3.Photosynthesis equal to rate of respiration

4.Neither photosynthesis nor respiration

Question: Count the number of true statements: (i) Application of gibberellins help early seed production in conifers. (ii) All synthetic auxins are widely used as herbicides. (iii) Kinetin promotes cytokin

1.1

2.2

3.3

4.4

Question: Denitrification is carried out by

1.Nitrosomonas

2.Nitrosococcus

3.Nitrobacter

4.Pseudomonas

Question: Difference between osmotic pressure and turgor pressure is

1.DPD

2.Transpiration pull

3.Osmotic potential

4.Solute potential

Question: Direction of conduction of food through phloem is

1.From below upwards

2.From tip to bottom

3.Phloem never conducts food

4.From leaves to roots

Question: During photorespiration, the oxygen consuming reaction(s) occur in

1.Stroma of chloroplast and peroxisomes.

2.Grana of chloroplasts and peroxisomes.

3.Stroma of chloroplasts.

4.Stroma of chloroplasts and mitochondria

Question: Effect of auxin diffusing from apical bud on lateral shoots is known as

1.promoting effect

2.compensatory effect

3.inhibitory effect

4.supporting effect

Question: Electrons lost by PS II are regained from

1.CO2

2.O2

3.H2O

4.None of the above

Question: Element which is a component of proteinaceous materials and protoplasm is

1.Potassium

2.Magnesium

3.Nitrogen

4.Oxygen

Question: Essential macronutrients are

1. Manufactured during photosynthesis

2. Produced by growth hormones

3.Absorbed by soil

4.Produced by enzymes

Question: Exchange of substances between a cell and its environment is due to

1.Diffusion

2.Osmosis

3.Active transport

4.All of the above

Question: Find out the true statements about vernalization: (i) It is the promotion of flowering by a period of low temperature (ii) It prevents precocious reproductive development early in the growing season

1.(i), (ii) and (iii).

2.(i) and (iii).

3.(ii) (iii) and (iv)

4.(i), (iii) and (iv)

Question: Flash of light in dark inhibits flowering in ..

1.SDP

2.LDP

3.LSDP

4.DNP

Question: Flowering in short day plants is induced by

1.Short days and interrupted long nights

2.Short days and uninterrupted long nights

3.Long days and interrupted short nights

4.Long days and uninterrupted short nights

Question: Function of leghaemoglobin during biological nitrogen fixation in root nodules of legumes is to

1.Convert atmospheric nitrogen to ammonia

2.Convert ammonia to nitrite

3.Transport oxygen for activity of nitrogenase

4.Protect nitrogenase from oxygen

Question: Function of red pigment leghaemoglobin present in root nodules of leguminous plants is to regulate

1.Co2 supply in cells

2.Mo supply to cells

3.O2 suplly to cells

4.None of the above

Question: Gene responsible for nitrogen fixation is

1.Nif

2.Nitrogenase

3.Yeast alanine tRNA synthatase

4.RNA synthatase

Question: Guttation is mainly due to

1.Root pressure

2.Osmosis

3.Transpiration

4.Imbibition

Question: How many molecules of NADH are produced when four molecules of phosphoglyceraldehyde are converted into four molecules of pyruvate

1.2

2.8

3.6

4.4

Question: How many of the following statements are true: (a) NAD mainly involved in catabolic pathway. (b) NADP mainly involved in anabolic pathway. (c) Non – cyclic electron transport is a multidirectional

1.One

2.Two

3.Three

4.Four

Question: How many pigments are responsible for the colour of a plant leaf?

1.One

2.Two

3.Three

4.Four

Question: Identify the following: (i) They have a special type of leaf anatomy. (ii) They tolerate a high range of temperature. (iii) They show responses to high light intensities. (iv) They lack photorespi

1.C2 plants

2.C3 plants

3.CAM plants

4.C4 plants

Question: In a plant subjected to continuous red light phytochrome will show ...

1.Increased synthesis

2.Decreased level

3.Destruction

4.Destruction and synthesis remain in balance

Question: In C4 photosynthesis, both C4 and C3 cycles are involved. Identify the catalytic function of RUBISco in C4 cycle

1. Oxygenation of RUBP.

2.Carboxylation of PEP.

3.Carboxylation of RuBp.

4.No function

Question: In geometrical growth (from beginning to last), the correct sequence of growth phases and their occurrence are:

1.Log phase → Lag phase → Asymptote

2.Asymptote → Log phase → Lag phase

3.Lag phase → Exponential phase → Asymptote

4.Lag phase → Exponential phase → Log phase.

Question: In mitochondria, protons accumulate in

1.Inter membrane space

2.Inner membrane

3.Matrix

4.Outer membrane

Question: In which type reactions related to plant photosynthesis, peroxisomes are involved

1.Glycolytic cycle

2.Calvin cycle

3.Bacterial photosynthesis

4.Glyoxylate cycle

Question: Inorganic nutrients are present in the soil as

1.Atoms

2.Molecules

3.Epectrically charged ions

4.Colloids

Question: Leaf fall occurs when content of

1.Abscisic acid decreases

2.Auxin decreases

3.Auxin increases

4.Gibberellin decreases

Question: Mannitol is storage food in

1.Chara

2.Gracilaria

3.Porphyra

4.Fucus

Question: Minerals are absorbed in the form of

1.Compounds

2.Minerals

3.Ions

4.Mixtures

Question: Nitrifying bacteria convert

1.Ammonia to nitrate

2.Nitrogen into soluble form

3.Nitrate to nitrogen

4.Ammonia to nitrogen

Question: On the basis of the information mentioned, select the correct name of phytohormones for a,b and c respectively: (i) Hormone (a) helps in initiation of root and root hair formation at low concentratio

1.a-auxin, b-Gibberellin, c-Ethylene

2.a-Cytokinin, b-Zeatin, c-ABA

3.a-IAA, b-Ethylene, c-Cytokinin.

4.a-Ethylene, b-Gibberellin, c-ABA.

Question: One hormone promotes abscission of flowers while the other delay senescence of fruits. These are respectively:

1.Auxin and Cytokinin.

2.Ethylene and Abscisic acid

3.Abscisic acid and Ethylene

4.Ethylene and Gibberellic acid

Question: One of these is herbicide ...

1.IAA

2.NAA

3.GA3

4.2,4-D

Question: Opening of flower and drooping of bud are ...

1.Hyponasty

2.Epinasty

3.Curvature movement

4.Spontaneous movements

Question: Optimum temperature for photosynthesis is

1.35° - 40°C

2. 25° - 35°C

3.20° - 25°C

4.10° - 15°C

Question: Oxidation of one molecule of glucose in aerobic respiration produces

1.2 ATP

2.8 ATP

3.16 ATP

4.38 ATP

Question: Oxidative phosphorylation refers to

1.Anaerobic production of ATP

2.Citric acid cycle production of ATP

3.Production of ATP by chemiosmosis

4.Alcoholic fermentation

Question: Parthenocarpic fruit cannot be produced by application of ...

1.IAA

2.2,4-D

3.ABA

4.IBA

Question: Path of water movement from soil to xylem is

1.Metaxylem → Protoxylem → Cortex → Soil → Root hair

2.Pericycle → Soil → Root hair → Cortex → Endodermis

3.Soil → Root hair → Cortex → Endodermis → Pericycle

4.Cortex → Root hair → Endodermis → Pericycle → Proto

Question: Photoperiodism is:

1.Germination of seed

2.Elongation of internodes

3.Flowering response towards light

4.Vegetative growth.

Question: Photorespiration involves oxidation of

1.Chlorophyll a

2.PGA

3.RuBP

4.Both b and c

Question: Photosynthesis is a process in which

1.ATP is generated

2.NADH is reduced to NAD

3.Oxidative phosphorylation occurs

4.CO2 is reduced

Question: Pigment involved in regulation/photomorphogenesis response is ...

1.Phytochrome

2.Cytochrome

3.Xanthophyll

4.Chlorophyll

Question: Pigment system I performs independently

1.Non-cyclic photophosphorylation

2. Cyclic photophosphorylation

3.Oxidative phosphorylation

4.Photolysis

Question: Plant ash indicates

1.Silica absorbed by plants

2.Both mineral salts and organic matter

3.Mineral salt absorbed by plants

4.Organic matter of plant

Question: Plant hormone associated with climacteric respiration:

1.Auxin

2.Caytokinin

3.Ethylene

4.Gibberellin

Question: Plants absorb nitrogen as

1.Nitrate

2.Nitrite

3.Ammonia and urea

4.All of the above

Question: Primary carboxylation occurs in C 3 and C 4 plants with the help of

1.PEP carboxylase and pyruvate carboxylase

2.PEP carboxylase and RuBP carboxylase

3.RuBP carboxylase and PEP carboxylase

4.RuBP carboxylase and pyruvate carboxylase

Question: Rate of growth stops and plants die at a temperature of

1.20-30°C

2.10-20°C

3.35-40°C

4.5-10°C

Question: 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) On

1.A and B are correct

2.B and C are correct

3.A and C are correct

4.B and D are correct

Question: Read the following statements: (i) Cytokinin help in lateral shoot growth. (ii) Ethylene influences horizontal growth of seedlings. (iii) ABA plays an important role in seed development. (iv) Ethy

1.(i), (ii) and (iii) are correct.

2.(iii) and (iv) are correct

3.(ii), (iii) and (iv) are correct

4.(ii) and (iii) are correct

Question: Statement a: Auxins promote apical dominance by suppressing activity of lateral buds Statement b: In moriculture, periodic pruning of shoot tips is done to makes Mulberry plants bushy

1.a and b correct with a being reason for b

2.a is correct, b is wrong

3.a is wrong, b is correct

4.Both a and b correct but a is not reason for b

Question: The conditions necessary for vernalization are: (i) High temperature and water. (ii) Low temperature and water. (iii) Water and Carbon dioxide. (iv) Oxygen and water.

1.(i), (ii) and (iii)

2.(i) and (ii)

3.(ii) and (iv)

4.(i) and (iii)

Question: The enzymes required for nitrogen fixation is

1.Nitrogen deaminase

2.Nitrodioxidase

3.Amino acid decarboxylase

4.Nitrogenase

Question: The name zeatin was coined by ...

1.Skoog

2.Miller

3.Letham

4.Melvin

Question: The other name of glycolysis is

1.Carbon pathway

2.TCA pathways

3.HMS pathways

4.EMP pathways

Question: Treatment of seeds at low temperature under moist conditions for breaking their dormancy is ... .

1.Vernalisation

2.Chelation

3.Stratification

4.Scarification

Question: When malic acid is respiratory substrate, the amount of CO2 released is

1. More than O2 consumed

2.Less than O2 released

3.Equal to O2 consumed

4.CO2 is not released

Question: Which does not HSK pathway

1.Jowar

2.Maize

3.Sugarcane

4.Sunflower

Question: Which group of three micronutrient elements affect both photosynthetic and mitochondrial electron transport?

1.Cu, Mn, Fe

2.Co, Ni, Mo

3.Ca, K, Na

4.Mn, Co, Ca

Question: Which is not related to transpiration?

1.Absorption and distribution of minerals

2.Circulation of water

3.Temperature

4.Bleeding

Question: Which of the following is a synthetic auxin?

1.IAA

2.NAA

3.IBA

4.ABA

Question: Which of the following sequences correctly represents the flow of electrons during photosynthesis

1.H2O → photosystem I → photosystem II

2.NADPH → chlorophyll → Calvin cycle

3.H2O → NADPH → Calvin cycle

4.NADPH → O 2 → CO2

Question: Which of the following stimulates growth or call enlargement? ..

1.Gibberellin

2.Auxin

3.Cytokinin

4.Ethylene

Question: Which one is not a C4 plant?

1.Maize

2.Sugarcane

3.Bryophyllum.

4.Sorghum.

Question: Which one is not a micronutrient?

1.B

2.Mo

3.Zn

4.Mg

Question: Which one is not connected with transport across the cell membrane

1.Osmosis

2.Active transport

3.Diffusion

4.Surface tension

Question: Which one is product of aerobic respiration?

1.Pyruvic acid

2.Lactic acid

3.Ethyl alcohol

4.Malic acid

Question: Which one is used for defoliation of forest trees? ..

1.Phosphon D

2.Maleic hydrazide

3.AMO 1618

4.2, 4-D

Question: Which plant hormone plays an important role in seed dormancy and germination respectively

1.Abscisic acid and Gibberellic acid

2.Ethylene and Abscisic acid

3.Ethylene and Gibberellic acid

4.Gibberellic and Ethylene acid

Question: Who first suggested presence of growth regulatory chemicals in plants?

1.Went

2.Sachs

3.Darwin

4.Paal

Question: Why are C4 plants able to photosynthesize with no apparent photorespiration?

1.They do not participate in the Calvin cycle.

2. They use PEP carboxylase to initially fix CO2 .

3.They are adapted to cold, wet climates.

4.They conserve water more efficiently.

Question: Yield of Rice increase by

1.Sesbania

2.Anabaena

3.Bacillus subtilis

4.B. popilliae

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