NEET Biology Photosynthesis In Higher Plants MCQs Set B

Question: In C₄ plants, mesophyll cells and bundle sheath cells are specialised to perform respectively

• a) Light reaction and dark reaction
• b) Light reaction and photorespiration
• c) Dark reaction and light reaction
• d) Photorespiration and dark reaction

Answer: Light reaction and dark reaction

Question: Agranal chloroplasts are found in

• a) Bundle sheath of sugarcane leaves
• b) Bundle sheath of mango leaves
• c) Mesophyll of pea leaves
• d) Mesophyll of maize leaves

Answer: Bundle sheath of sugarcane leaves

Question: Find odd one (w.r.t. double carboxylation)

• a) Pisum sativum
• b) Sorghum
• c) Zea mays
• d) Sugarcane

Answer: Pisum sativum

Question: Photosynthesis of maize plant differ from wheat plant in

• a) All of these
• b) Having spatial separation in both carboxylations
• c) Number of ATP required per CO₂ fixation
• d) Having PEPcase activity

Answer: All of these

Question: In C₄ plants, the bundle sheath cells

• a) Have a high density of chloroplasts
• b) Have large intercellular spaces
• c) Have thin walls to facilitate gaseous exchange
• d) Are rich in PEP carboxylase

Answer: Have a high density of chloroplasts

Question: C₄ plants are less efficient at low temperature due to

• a) Cold sensitivity of PEP synthetase enzyme
• b) High energy requirement for CO₂ fixation
• c) Low O₂ affinity of PEPcase
• d) Reduced rate of decarboxylation of organic acids

Answer: Cold sensitivity of PEP synthetase enzyme

Question: C₄ plants can tolerate saline conditions due to

• a) Occurrence of organic acids
• b) Presence of PEP synthetase enzyme
• c) Absence of photorespiration
• d) Presence of PEP carboxylase enzyme

Answer: Occurrence of organic acids

Question: Which group of plants are not benefitted by CO₂ fertilisation effect?

• a) Plants with Kranz anatomy
• b) Plants having single carboxylation
• c) Plants requiring 3 ATP per CO₂ fixation
• d) Plants having high rate of photorespiration

Answer: Plants with Kranz anatomy

Question:

• a) Conversion of Pyruvate to PEP
• b) Conversion of PEP to Malate
• c) Conversion of PEP to OAA
• d) Conversion of Malate to Oxaloacetate

Answer: Conversion of Pyruvate to PEP

Question: The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction?

• a) Manganese and Chlorine
• b) Magnesium and Molybdenum
• c) Magnesium and Chlorine
• d) Manganese and Potassium

Answer: Manganese and Chlorine

Question: Anoxygenic photosynthesis is characteristic of

• a) Rhodospirillum
• b) Spirogyra
• c) Chlamydomonas
• d) Ulva

Answer: Rhodospirillum

Question:

• a) Photorespiration
• b) Transpiration
• c) Glycolysis
• d) Photosynthesis

Answer: Photorespiration

Question: The correct sequence of cell organelles during photorespiration is

• a) Chloroplast, – mitochondria, – peroxisome
• b) Chloroplast, – vacuole, – peroxisome
• c) Chloroplast, – Golgibodies, – mitochondria
• d) Chloroplast, – Rough endoplasmic reticulum, – Dictyosomes

Answer: Chloroplast, – mitochondria, – peroxisome

Question: In Kranz anatomy, the bundle sheath cells have

• a) Thick walls, no intercellular spaces and large number of chloroplasts
• b) Thin walls, many intercellular spaces and no chloroplasts
• c) Thick walls, many intercellular spaces and few chloroplasts
• d) Thin walls, no intercellular spaces and several chloroplasts

Answer: Thick walls, no intercellular spaces and large number of chloroplasts

Question: CAM helps the plants in

• a) Conserving water
• b) Secondary growth
• c) Disease resistance
• d) Reproduction

Answer: Conserving water

Question: PGA as the first CO₂ fixation product was discovered in photosynthesis of

• a) Alga
• b) Bryophyte
• c) Gymnosperm
• d) Angiosperm

Answer: Alga

Question:

• a) Presence of larger number of chloroplasts in the leaf cells
• b) Presence of thin cuticle
• c) Higher leaf area
• d) Lower rate of photorespiration

Answer: Presence of larger number of chloroplasts in the leaf cells

 More Questions..........................................

Question:

• a) B and D
• b) A and B
• c) B and C
• d) C and D

Answer: B and D

Question: Kranz anatomy is one of the characteristics of the leaves of

• a) Sugarcane
• b) Wheat
• c) Mustard
• d) Potato

Answer: Sugarcane

Question:

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Oxygenic photosynthesis occurs in:

• a) Oscillatoria
• b) Rhodospirillum
• c) Chlorobium
• d) Chromatium

Answer: Oscillatoria

Question: Cyclic photophosphorylation results in the formation of

• a) ATP
• b) NADPH
• c) ATP, NADPH and O₂
• d) ATP and NADPH

Answer: ATP

Question: Stroma in the chloroplasts of higher plant contains

• a) Light-independent reaction enzymes
• b) Ribosomes
• c) Light-dependent reaction enzymes
• d) Chlorophyll

Answer: Light-independent reaction enzymes

Question:

• a) They have more chloroplasts
• b) The CO₂ compensation point is more
• c) CO₂ generated during photorespiration is trapped and recycled through PEP carboxylase
• d) The CO₂ efflux is not prevented

Answer: They have more chloroplasts

Question:

• a) Quinone
• b) Cytochrome - f
• c) Cytochrome - b
• d) Ferredoxin

Answer: Quinone

Question: The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is

• a) Quinone
• b) Cytochrome
• c) Iron-sulphur protein
• d) Ferredoxin

Answer: Quinone

Question:

• a) Mesophyll
• b) Bundle sheath
• c) Phloem
• d) Epidermis

Answer: Mesophyll

Question: In photosystem-I, the first electron acceptor is

• a) An iron-sulphur protein
• b) Plastocyanin
• c) Cytochrome
• d) Ferredoxin

Answer: An iron-sulphur protein

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

• a) Stroma of chloroplasts and peroxisomes
• b) Stroma of chloroplasts and peroxisomes
• c) Stroma of chloroplasts and mitochondria
• d) Grana of chloroplasts and peroxisomes

Answer: Stroma of chloroplasts and peroxisomes

Question:

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: 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

• a) 12
• b) 0
• c) 6
• d) 2

Answer: 12

Question: Photosynthetic Active Radiation (PAR) has the following range of wavelengths

• a) 400 - 700 nm
• b) 450 - 950 nm
• c) 340 - 450 nm
• d) 500 - 600 nm

Answer: 400 - 700 nm

Question: Chlorophyll-a molecule at its carbon atom 3 of the pyrrole ring II has one of the following

• a) Methyl group
• b) Aldehyde group
• c) Magnesium
• d) Carboxylic group

Answer: Methyl group

Question: Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants?

• a) Violet and blue
• b) Red and violet
• c) Green and red
• d) Blue and green

Answer: Violet and blue

Question: During light reaction of photosynthesis, which of the following phenomenon is observed during cyclic phosphorylation as well as non-cyclic phosphorylation?

• a) Formation of ATP
• b) Involvement of PS I & PS II pigment systems
• c) Formation of NADPH
• d) Release of O₂

Answer: Formation of ATP

Question: NADPH₂ is generated through

• a) Photosystem I
• b) Glycolysis
• c) Anaerobic respiration
• d) Photosystem II

Answer: Photosystem I

Question: The first step for initiation of photosynthesis will be

• a) Excitement of chlorophyll molecules due to absorption of light
• b) Photolysis of water
• c) ATP formation
• d) Glucose formation

Answer: Excitement of chlorophyll molecules due to absorption of light

Question: Which pigment system is inactivated in red drop?

• a) PS-II
• b) None of these
• c) PS-I
• d) PS-I and PS-II

Answer: PS-II

Question: In photosynthesis, energy from light reaction to dark reaction is transferred in the form of

• a) ATP
• b) RuDP
• c) Chlorophyll
• d) ADP

Answer: ATP

Question: Which of the following absorb light energy for photosynthesis?

• a) Chlorophyll
• b) RuBP
• c) Water molecule
• d) O₂

Answer: Chlorophyll

Question: How many electrons, protons and photons are involved in the lysis of water to evolve one molecule of oxygen?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

• a) Ribulose 1, 5-diphosphate (RuDP
• b) Ribulose monophosphate (RMP)
• c) Phosphoenolpyruvate (PEP)
• d) Phosphoglyceric acid (PGA)

Answer: Ribulose 1, 5-diphosphate (RuDP

Question: What will be the number of Calvin cycles to generate one molecule of hexose?

• a) 6
• b) 4
• c) 9
• d) 8

Answer: 6

Question:

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which one of the following represents photophosphorylation ?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

• a) 3-phosphoglyceric acid
• b) Malic acid
• c) Oxaloacetic acid
• d) Phosphoglyceraldehyde

Answer: 3-phosphoglyceric acid

Question: Bundle sheath cells

• a) Are rich in RuBisCo
• b) Lack RuBisCo
• c) Are rich in PEP carboxylase
• d) Lack both RuBisCo and PEP carboxylase

Answer: Are rich in RuBisCo

Question: Which one of the following organisms is correctly matched with its three characteristics?

• a) Maize : C₃ pathway, Closed vascular bundles, Scutellum
• b) Onion : Bulb, Imbricate aestivation, Axile placentation
• c) Tomato : Twisted aestivation, Axile placentation, Berry
• d) None of these

Answer: Maize : C₃ pathway, Closed vascular bundles, Scutellum

Question: Presence of bundle sheath is a characteristic of

• a) C₄ plants
• b) Xerophytic plants
• c) Members of the grass family
• d) C₃ plants

Answer: C₄ plants

Question: In C₄ plants, the bundle sheath cells

• a) Have a high density of chloroplasts
• b) Have large intercellular spaces
• c) Have thin walls to facilitate gaseous exchange
• d) Are rich in PEP carboxylase

Answer: Have a high density of chloroplasts

Question: The CO₂ fixation during C₄ pathway occurs in the chloroplast of

• a) Mesophyll cells
• b) Spongy parenchyma
• c) Bundle sheath cells
• d) Guard cells

Answer: Mesophyll cells

Question:

• a) Mesophyll cells
• b) Sclerenchyma
• c) Sclerenchyma
• d) Guard cells

Answer: Mesophyll cells

Question:

• a) Phosphoenol pyruvate
• b) Phosphoglyceric acid
• c) Phosphoglyceraldehyde
• d) Ribulose monophosphate

Answer: Phosphoenol pyruvate

Question:

• a) PEP carboxylase
• b) RuBisCo
• c) Phosphoric acid
• d) RuDP carboxylase

Answer: PEP carboxylase

Question: Which pair is wrong?

• a) C₃ -Maize
• b) Calvin cycle-PGA
• c) C₄ -Kranz anatomy
• d) Hatch and Slack cycle – OAA

Answer: C₃ -Maize

Question:

• a) Phosphoenol pyruvic acid carboxylase
• b) Fructose phosphatase
• c) Ribulose biphosphate carboxylase
• d) Ribulose phosphate kinase

Answer: Phosphoenol pyruvic acid carboxylase

Question: Which one of the following is wrong in relation to photorespiration ?

• a) It is a characteristic of C₄ plants
• b) Ist oxidation in chloroplast
• c) It occurs in day time only
• d) None of these

Answer: It is a characteristic of C₄ plants

Question: Maximum absorption of light occurs in the region of

• a) 400 - 700 nm
• b) 700 – 900 nm
• c) 1500 – 2000 nm
• d) 1000 - 1200 nm

Answer: 400 - 700 nm

Question: The rate of photosynthesis is higher in

• a) Red light
• b) Green light
• c) Continuous light
• d) Very high light

Answer: Red light

Question: The law of limiting factors’ was proposed by

• a) Blackman
• b) Arnon
• c) Hatch and Slack
• d) Leibig

Answer: Blackman

Question: Plants adapted to low light intensity have

• a) Larger photosynthetic unit size than the sun plants
• b) More extended root system
• c) Leaves modified to spines
• d) None of these

Answer: Larger photosynthetic unit size than the sun plants