Photosynthesis and Respiration Quiz | Photosynthesis and Respiration Objective Type Questions and Answers

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Questions
21 In mitochondria, chemiosmosis translocates protons from the matrix into the intermembrane space, whereas in chloroplasts, chemiosmosis translocates protons from
A the stroma to the photosystem II
B the matrix to the stroma
C the stroma to the thylakoid space
D the intermembrane space to the matrix

Answer: the stroma to the thylakoid space
22 Which of the following does not occur during the Calvin cycle?
A carbon fixation
B oxidation of NADPH
C release of oxygen
D regeneration of the CO2 acceptor

Answer: release of oxygen
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23 How is photosynthesis similar in C4 and CAM plants?
A In both cases, only photosystem I is used
B Both types of plants make sugar without the Calvin cycle
C In both cases, rubisco is not used to fix carbon initially
D Both types of plants make most of their sugar in the dark

Answer: In both cases, rubisco is not used to fix carbon initially
24 Which of the following sequences correctly represents the flow of electrons during photosynthesis?
A NADPH → O2 → CO2
B H2O → NADPH → Calvin cycle
C NADPH → chlorophyll → Calvin cycle
D H2O → photosystem I → photosystem II

Answer: H2O → NADPH → Calvin cycle
25 Why are C4 plants able to photosynthesize with no apparent photorespiration?
A They do not participate in the Calvin cycle
B They use PEP carboxylase to initially fix CO2
C They are adapted to cold, wet climates
D They conserve water more efficiently

Answer: They use PEP carboxylase to initially fix CO2
26 In metabolic processes of cell respiration and photosynthesis, prosthetic groups such as heme and iron -sulfur complexes are encountered. What do they do?
A donate electrons
B act as reducing agents
C act as oxidizing agents
D both oxidize and reduce during electron transport

Answer: both oxidize and reduce during electron transport
27 Conversion of pyruvic acid into ethyl alcohol is facilitated by the enzymes:
A carboxylase
B phosphatase
C dehygrogenase
D carboxylase and dehygrogenase

Answer: carboxylase and dehygrogenase
28 The final acceptor of electrons in the electron transport chain is
A Water
B Oxygen
C Hydrogen
D Cytochrome b

Answer: Oxygen
29 Classification of organisms as oxygenic or anoxygenic during photosynthesis is based on ______
A The presence of Co2
B The generation of oxygen
C The presence of light
D The presence of water

Answer: The generation of oxygen
30 Name the mechanism which prevents photo-oxidative damage in plants?
A Photosynthesis
B Photorespiration
C Photoprotection
D Phytoprotection

Answer: Photoprotection
31 What is the location of photosynthetic pigment in an oxygenic photosynthetic organism?
A Plasma membranes
B Thylakoid membranes
C Chromatophores
D Chlorosome

Answer: Thylakoid membranes
32 Which of the following is an anoxygenic photosynthetic organism?
A Plants
B Photosynthetic protists
C Cyanobacteria
D Green and Purple photosynthetic organism

Answer: Green and Purple photosynthetic organism
33 Which of these features are not of chlorophyll?
A It has Mg2+ as the central metal ion
B It has cyclopentanone ring fused with a pyrrole ring
C It has a planer tetrapyrrole ring structure
D It is water-soluble pigment

Answer: It is water-soluble pigment
34 Rate of photosynthesis does not depend upon:
A Quality of light
B Intensity of Light
C Duration of Light
D Temperature

Answer: Duration of Light
15 For photosynthesis green plants require:
A Chlorophyll only
B Light
C Carbon dioxide and water
D All of the above

Answer: All of the above
36 Name the pigment which is responsible for absorption of light in plants?
A Chlorophyll
B Stoma
C Xylem
D Phloem

Answer: Chlorophyll
37 In bacteria name the colour of light which is responsible for photosynthesis?
A Ultra-Violet
B Blue
C Red
D None of above

Answer: Red
38 Name the metal present in chlorophyll ‘a’ and ‘b’?
A Iron
B Copper
C Magnesium
D Manganese

Answer: Magnesium
39 The process of respiration in green plants occurs
A only when stomata are open
B only when photosynthesis ceases
C only when photosynthesis is in progress
D At all times

Answer: At all times
20 Respiratory enzymes are located in
A Mitochondrial Matrix
B Cristae
C Perimitochondrial Space
D Outer Membrane

Answer: Cristae
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