NEET Biology Photosynthesis MCQs Set C

Question: Which of the following pigments contains open pyrolle ring?

• a) Phycobilins
• b) Xanthophylls
• c) Chlorophylls
• d) None of the above

Answer: Xanthophylls

Question: In which of the following light, rate of photosynthesis is maximum?

• a) discontinuous white
• b) white
• c) red
• d) blue

Answer: discontinuous white

Question: Quantum yield of photosynthesis is

• a) 12.5%
• b) 13%
• c) 8 %
• d) 13.5 %

Answer: 12.5%

Question: During light phase of photosynthesis ______ is oxidized and ______ is reduced

• a) Water and NADP
• b) CO₂ and Water
• c) Water and CO₂
• d) NADPH₂ and CO₂

Answer: Water and NADP

Question: During dark phase of photosynthesis ______ is oxidized and ______ is reduced

• a) NADPH₂ and CO₂
• b) Water and CO₂
• c) Water and NADP
• d) CO₂ and Water

Answer: NADPH₂ and CO₂

Question: The visible product of photosynthesis is ______.

• a) starch
• b) fructose
• c) cellulose
• d) cellulose

Answer: starch

Question: To produce 3 glucose molecules ______ ATP and ______ NADPH2 molecules are required.

• a) 54, 36
• b) 54, 30
• c) 36, 60
• d) 18, 12

Answer: 54, 36

Question: Glycolytic reversal is a part of ______.

• a) dark phase of photosynthesis
• b) anaerobic respiration
• c) light phase of photosynthesis
• d) aerobic respiration

Answer: dark phase of photosynthesis

Question: RuBp carboxylase acts as RuBp carboxygenase at ______ CO₂ conc. And ______ O₂ conc

• a) low, high
• b) low, low
• c) high, high
• d) high, low

Answer: low, high

Question: The source of CO₂ during calvin cycle in C₄ plant is

• a) Malic acid
• b) OAA
• c) PEP
• d) RuBP

Answer: Malic acid

Question: Dicot which follow C₄ pathway is____.

• a) Amranthu
• b) wheat
• c) Maize
• d) Mango

Answer: Amranthu

Question: Absorption spectrum of chlorophyll is maximum in _____ light.

• a) blue
• b) red
• c) yellow
• d) blue-violet

Answer: blue

Question: The oxygen molecule in glucose formed during photosynthesis comes from

• a) CO₂
• b) atmosphere
• c) Organic acids
• d) Water

Answer: CO₂

Question: Dimorphic chloroplast are present in ______.

• a) all of these
• b) sorghum bicolor
• c) sacchrum officinale
• d) zea mays

Answer: all of these

Question: Red pigment in tomato is

• a) Lycopene
• b) Lutein
• c) Anthocyanin
• d) None of the above

Answer: Lycopene

Question: Solarisation refers to ______.

• a) destruction of chlorophyll
• b) formation of sugar with help of water and energy
• c) synthesis of chl
• d) None of the above

Answer: destruction of chlorophyll

Question: Dark reaction requires light reaction for

• a) reduction of PGA
• b) carboxylation of RUBP
• c) regeneration of RuBP
• d) formation of hexose sugar

Answer: reduction of PGA

Question: Emerson effect proves

• a) concept of two photosystem in plant
• b) photorespiration
• c) photophosphorylation
• d) there are light and dark reaction in photosynthesis

Answer: concept of two photosystem in plant

Question: there are light and dark reaction in photosynthesis

• a) Pitcher plant
• b) cuscutta
• c) Bryophyllum
• d) Algae

Answer: Pitcher plant

Question: Light reaction of photosynthesis results in formation of ______.

• a) All of these
• b) ATP
• c) NADPH + H⁺
• d) O₂ 

Answer: All of these

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

Question: Chlorophyll-a differes from chlorophyll-b in having—

• a) Methly group instead of aldehyde group
• b) Aldehyde group instead of methyl group
• c) Methyl group instead of ethyl group
• d) Only phytol tail instead of head

Answer: Methly group instead of aldehyde group

Question: In non-cyclic photophosphorylation

• a) All the above
• b) Electron flow is unidirectional
• c) Both PSI and PSII are involved
• d) ATP is generated

Answer: All the above

Question: In con-cyclic photophosphorylation, the electron emitted by P₆₈₀ is replaced by electron from

• a) Water
• b) NADP
• c) Ferridoxin
• d) Chlorophyll-a

Answer: Water

Question: 85-90% (9/10) of all photosynthesis in the world is carried out by

• a) Algae of the oceans
• b) Scientists in the laboratory
• c) Herbs
• d) Shrubs

Answer: Algae of the oceans

Question: Primary and secondary processes of Photosynthesis takes place in ______ and ______ respectively

• a) Grana and stroma
• b) Stroma and lamellae
• c) Stroma and grana
• d) Thylakoid and quantasome

Answer: Grana and stroma

Question: Which one occurs during both cyclic and non-cyclic photophosphorylation

• a) Formation of ATP
• b) Release of O₂
• c) Formation of NADPH2
• d) Involvement of both PSI and PSII

Answer: Formation of ATP

Question: The photochemical process in photosynthesis which needs both PSI and PSII also involves

• a) All of these
• b) Z-scheme of electron transfer
• c) Photolysis of water
• d) Synthesis of assimilatory power

Answer: All of these

Question: For synthesis of one molecule of glucose, the requirement of ATP and NADPH₂ is respectively

• a) 18 and 12
• b) 12 and 8
• c) 15 and 10
• d) 30 and 15

Answer: 18 and 12

Question: Which of the following element is needed for chlorophyll biosynthesis?

• a) Magnesium
• b) Chlorine
• c) Calcium
• d) Copper

Answer: Magnesium

Question: The two enzymes responsible for primary carboxylation in C₃ and C₄ pathway, respectively are

• a) RuBP carboxylase and PEP carboxylase
• b) PEP carboxylase and pyruvate carboxylase
• c) PEP carboxylase and RuBP carboxylase
• d) RuBP carboxylase and RuBP oxygenas

Answer: RuBP carboxylase and PEP carboxylase

Question: _______ are placed one above the other to form stack of coins

• a) thylakoids
• b) cristae
• c) F₁ particles
• d) oxysomes

Answer: thylakoids

Question: The head and tail of chlorophyll are made up of

• a) Pophyrine and phytol
• b) Pyrrole and tetrapyrrole
• c) Porphyrine and phyrin
• d) Tetrapyrrole and magnesium

Answer: Pophyrine and phytol

Question: The numbner of photons needed for the evolution of one molecule of oxygen is

• a) 8
• b) 2
• c) 12
• d) 18

Answer: 8

Question: Action spectrum is

• a) A graph showing rate of photosynthesis
• b) A graph showing absorption of light
• c) A graph showing amount of CO₂ released
• d) A graph showing amount of light absorbed

Answer: A graph showing rate of photosynthesis

Question: C₄₀H₅₆O₂ is molecular formula of

• a) Xanthophyll
• b) Chlorophylls
• c) Carotenes
• d) Phycobillins

Answer: Xanthophyll

Question: Quantasome contains

• a) 230-250 chlorophyll molecules
• b) 150-200 chlorophyll molecules
• c) 200 chlorophyll molecules
• d) 300-350 chlorophyll molecules

Answer: 230-250 chlorophyll molecules

Question: Erythrose monophosphate (4C) is formed during

• a) Regeneration of RuBP
• b) CAM pathway
• c) Conversion of fructose to glucose
• d) C₄ pathway

Answer: Regeneration of RuBP

Question: Donor and acceptor of electrons is the same chlorophyll molecule in

• a) Cyclic phtophosphorylation
• b) Substrate level phosphorylation
• c) Photorespiration
• d) Non-cyclic photophosphorylation

Answer: Cyclic phtophosphorylation

Question: If a photosynthsing plant releases O₁₈, it is concluded that the plant has been supplied with

• a) Water containing O₁₈
• b) Oxygen in the form of ozone
• c) Carbon dioxide containing O₁₈
• d) Sugar containing O₁₈

Answer: Water containing O₁₈

Question: Which of the following connet the primary and secondary processes of photosynthesis?

• a) ATP and NADPH₂
• b) Ferridoxins
• c) ATP
• d) NADPH₂

Answer: ATP and NADPH₂

Question: C₄ plants can perform photosynthesis

• a) Even in low CO₂ concentration
• b) Even in low light intensity
• c) Only in high intensity of light and high CO₂
• d) none of the above

Answer: Even in low CO₂ concentration

Question: In Hill’s experiment, Hill used ______ as oxygen acceptor

• a) Haemoglobin
• b) NADP
• c) FAD
• d) Hydrogen

Answer: Haemoglobin

Question: Fret channel is a another name for

• a) Space present in stroma lamellae
• b) Intergranal lamellae
• c) Stroma lamellae
• d) Grana lamellae

Answer: Space present in stroma lamellae

Question: Bundle sheath chloroplast of C₄ plants are

• a) Large and agranal
• b) Large and granal
• c) Small and granal
• d) Small and agranal

Answer: Large and agranal

Question: In C₃ pathway, out of 12 molecules of 3-PGAL, how many are used for regeneration of RuBP?

• a) 10
• b) 8
• c) 12
• d) 6

Answer: 10

Question: Plant is kept in 300 ppm CO₂ concentration. What will happen to it

• a) Plant will show normal photosynthesis
• b) Respiration will be greatly decreased
• c) Plant will grow but will not die
• d) Plant will die soon

Answer: Plant will show normal photosynthesis

Question: All plastids have essentially same structure because

• a) One type of plastid can be differentiated into another type of plastid depending on cell requirements
• b) All plastids store starch, lipid and proteins
• c) They are localized in aerial parts of plants
• d) They have to perform same function

Answer: One type of plastid can be differentiated into another type of plastid depending on cell requirements

Question: Give the correct name of indicated part A and B (CHART)

• a) A- cytocrome-b& f B-Thylakoid
• b) A- cytopalsm B-Thylakoid
• c) A- Thylakoid B-cytocrome-a & a₃
• d) A- cytocrome-a & a₃ B -Thylakoid

Answer: A- cytocrome-b& f B-Thylakoid

Question:  Which process is indicated by the given chart?

• a) Synthesis of ATP by chemiosmosis
• b) Synthesis of food by chemiosmosis
• c) hydrolysis of water by chemiosmosis
• d) transfer of electron by chemiosmosis

Answer: Synthesis of ATP by chemiosmosis

Question: Choose the correct statement

• a) Chl a is blue green pigment with formula C₅₅H₇₂O₅N₄Mg
• b) Xanthophyll is pigment with formula C₄₀H6₀
• c) Both
• d) none of the above

Answer: Chl a is blue green pigment with formula C₅₅H₇₂O₅N₄Mg