Photosynthesis Set 2

All India Pre Medical Test (AIPMT)

Practice Mode Previous Next
On This Page

This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Photosynthesis Set 2

Q1 | Match Column – I with given under Column – II ; choose the answer which gives correct combination:Column – I(Scientists) Column – II(Contributions)P. A pigment which absorbs red and far-red light (i) CytochromeQ. Main pigment involved in transfer of electrons in (ii) PEP carboxylase photosynthesis isR. NADPH2 is generated through.... (iii) PhotochromeS. Enzyme which fixes CO2 in C4 plants (iv) Photosystems
  • P = (i), Q = (ii), R = (iii), S = (iv)
  • P = (iii), Q = (i), R = (iv), S = (iii)
  • P = (iii), Q = (ii), R = (iii), S= (i)
  • P = (i), Q = (ii), R = (iv), S = (iii)
Answer: P = (iii), Q = (i), R = (iv), S = (iii)
Q2 | The basic feature of typical C4 plants showing ‘Kranz’ anatomy is
  • the presence of chloroplasts in mesophyll and epidermal cells
  • the presence of chloroplasts in bundle sheath cells
  • the presence of rudimentary chloroplasts in bundle sheath cells and typical chloroplasts with well-formed grana in mesophyll cells
  • the presence of typical chloroplasts with well-formed grana in bundle sheath cells and rudimentary chloroplasts in the mesophyll cells
Answer: the presence of rudimentary chloroplasts in bundle sheath cells and typical chloroplasts with well-formed grana in mesophyll cells
Q3 | A. Six turns of Calvin-cycle result in the production of one molecule of glucose (C6H12O6) R. Three molecules of ribulose 1, 5 – bisphosphate (Ru BP) react with three molecules of carbon dioxide to produce six carbon intermediates.
  • A is correct and R is its explanation
  • A is correct but R is not its explanation
  • A is correct but R is wrong
  • Both A and R are wrong
Answer: A is correct but R is wrong
Q4 | Maximum photosynthesis occurs in which of these lights ?
  • Red
  • Green
  • Very high light
  • Continuous bright light
Answer: Red
Q5 | In C4 plants showing Kranz anatomy which of the following is correct ?
  • Bundle sheath cells without grana and mesophyll cells with grana
  • bundle sheath cells with grana mesophyll cells without grana
  • both are without grana
  • both are with grana
Answer: Bundle sheath cells without grana and mesophyll cells with grana
Q6 | In Blackmann’s ‘Law of Limiting Factors’ the rate of photosynthesis continues to increase with the successive increase in the amounts of
  • carbon dioxide, light, temperature
  • temperature, light, carbon dioxide
  • light, temperature, carbon dioxide
  • light, carbon dioxide, temperature
Answer: carbon dioxide, light, temperature
Q7 | Choose the correct statement
  • Chl a is blue green pigment with formula C55H70O6N4Mg
  • Chl a is blue green pigment with formula C55H72O5N4Mg
  • Chl b is yellow green pigment with formula C55H70O5N4Mg
  • Xanthophyll is pigment with formula C40H60
Answer: Chl a is blue green pigment with formula C55H72O5N4Mg
Q8 | Chlorophyll a is absent in which of the following photosynthesising organisms ?
  • Bacteria
  • Cyanobacteria
  • Red algae
  • Brown algae
Answer: Bacteria
Q9 | Photorespiration in C3 plants starts from.
  • phosphoglycerate
  • phosphosglycolate
  • glycerate
  • glycine
Answer: phosphosglycolate
Q10 | Which one of the following is wrong in relation to photorespiration ? It
  • occurs in chloroplast
  • occurs in daytime only
  • is a characteristic of C4 plants
  • is a characteristic of C3 plants
Answer: is a characteristic of C4 plants
Q11 | In sugarcane plant CO2 is fixed in malic acid, in which the enzyme that fixes CO2 is
  • ribulose biphosphate carboxylase
  • phosphoenol pyruvic acid carboxylase
  • ribolose phosphate kinase
  • fructose phosphatase
Answer: phosphoenol pyruvic acid carboxylase
Q12 | Plants are removed from patients room at night because
  • they produce CO2 at night in more concentration
  • they produce CO2 all the time but release O2 also in day time
  • they consume O2 at night.
  • they do not photosynthesize at night, therefore fail to deplete CO2 of the room, hence their presence will increase CO2
Answer: they produce CO2 all the time but release O2 also in day time
Q13 | Who is that scientist who gave the Law of limiting factors ?
  • Blackman
  • Hill
  • Liebig
  • Von Mohi
Answer: Blackman
Q14 | Which of the following is correct for chlorophyll of cyanobacteria ?
  • Chl a = C55H70O6N4 Mg
  • Chl a = C55H72O5N4 Mg
  • Chl b = C55H72O6N4 Mg
  • Xanthophyll = C40H56
Answer: Chl a = C55H72O5N4 Mg
Q15 | How many electrons are involved for the formation of 1 mole of glucose and 6O2 molecules ?
  • 6
  • 12
  • 18
  • 24
Answer: 12
Q16 | A. The atmospheric concentration of CO2 at which photosynthesis just compensation point.R. The CO2 compensation point is reached when the amount of CO2 uptake is less than that generated through respiration because the level of CO2 in the atmosphere is more than that required for achieving CO2 compensation point.
  • If A is correct and R is its explanation
  • If A is correct but R is not its explanation
  • If A is correct but R is wrong
  • If both A and R are correct
Answer: If A is correct but R is wrong
Q17 | Choose the correct statement.
  • The C4 plants do not have Rubisco.
  • Carboxylation of RuBP leads to the formation of PGA and phosphoglycolate.
  • Decarboxylation of C4 acids occurs in the mesophyll cells.
  • In CAM plants Calvin’s cycle reactions occur during night.
Answer: Decarboxylation of C4 acids occurs in the mesophyll cells.
Q18 | Match the names of scientists given under Column – I with their important contributions given underColumn – II ; choose the answer which gives correct combination of the alphabets :Column – I(Scientists) Column – II(Contributions)P. Peter Mitchell (i) Law of limiting factorQ. Blackmann (ii) Dark reactionR. Daniel Arnon (iii) Photosynthetic phosphorylationS. Melvin Calvin (iv) Chemiosmotic hypothesist. Mass flow hyposhesis
  • P = (iv) Q = (i) R = (iii) S = (ii)
  • P = (i) Q = (iv) R = (ii) S = (iii)
  • P = (ii) Q = (i) R = (iii) S = (iv)
  • P = (iv) Q = (iii) R = (ii) S = (i)
Answer: P = (iv) Q = (i) R = (iii) S = (ii)
Q19 | Match the following with correct combinationP. Carboxylation (i). Oxygen evolutionQ. Phosphorylation (ii) PhotorespirationR. Photolysis of water (iii) RubiscoS. Phosphoglycolate (iv) ChemosynthesisT. Nitrosomonas (v)ATP
  • P = (i) Q = (ii) R = (iii) S = (iv) T = (v)
  • P = (iii) Q = (v) R = (i) S = (ii) T = (iv)
  • P = (i) Q = (iii) R = (v) S = (iv) T = (i)
  • P = (i) Q = (iii) R = (iv) S = (ii) T = (v)
Answer: P = (iii) Q = (v) R = (i) S = (ii) T = (iv)
Q20 | During photosynthessis, plants
  • absorb O2, release CO2
  • release O2, absorb CO2
  • absorb N2, release O2
  • absorb N2 and release NH3
Answer: release O2, absorb CO2
Q21 | A plant with low CO2 compensation point is
  • Atriplex patula
  • Leucopoa kingii
  • Gossypium hisrsutum
  • Tidestromia oblingifolia
Answer: Atriplex patula
Q22 | Rubisco is an enzyme for
  • CO2 fixation in dark reaction
  • photorespiration
  • regeneration of RuBP
  • photolysis of water
Answer: photorespiration
Q23 | Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because :
  • Four carbon acids are the primary initial CO2 fixation production.
  • The primary fixation of CO2 is mediated via PEP carboxalase.
  • Effective pumping of CO2 into bundlesheath cells.
  • Rubisco in C4 plants has higher affinity for CO2.
Answer: The primary fixation of CO2 is mediated via PEP carboxalase.
Q24 | Stomata of CAM plants
  • are always open
  • open during the day and close at right.
  • open during the night and close during the day.
  • never open
Answer: open during the night and close during the day.
Q25 | The Calvin cycle proceeds in three stages1. reduction, during which carbohydrate is formed at the expense of the photochemically made ATP and NADPH2. regeneration, during which the carbon dioxide acceptor ribulose – 1, 5 – biphosphate is formed3. carboxylation, during which carbon dioxide combines with ribulose – 1, 5 - biophosphate
  • 2003-01-02
  • 2003-02-01
  • 2001-02-03
  • 2002-01-03
Answer: 2003-01-02
Previous Next