Photosynthesis Exam questions:
Ques. Which of the following is least effective in photosynthesis?
(a) Sun light
(b) Red light
(c) Blue light
(d) Green light
Ques. Dark reactions of photosynthesis occur in
(a) Granal thylakoid membranes
(b) Stromal lamella membranes
(c) Stroma outside photosynthetic lamellae
(d) Periplastidial space
Ques. Dark reaction of photosynthesis occurs in the
(a) Membrane of the stroma lamellae
(b) Stroma of the chloroplast outside the lamellae
(c) Space between the two membrane of chloroplast
(d) Thylakoid membrane of grana
Ques. The process of photosynthesis is caused by
(a) Carbon dioxide
(b) Water
(c) Chlorophyll
(d) All the above
Ques. In photosynthesis, a compound belonging to which of the following families is formed ?
(a) Protein
(b) Fat
(c) Carbohydrate
(d) Vitamin
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Ques. Oxygen containing carotenoids are
(a) Carotenes
(b) Xanthophylls
(c) Anthocyanins
(d) Phycobilins
Ques. Most enzymes involved in respiration and photosynthesis are made up of carbon, hydrogen and the following
(a) O2, N and S
(b) P and S
(c) Fe and Mn
(d) Cu and Mo
Ques. Which of the following is the correct statement?
(a) heterotrops synthesise their own food
(b) heterotrops utilize solar energy for photosynthesis
(c) heterotrops do not synthesise their own food
(d) heterotrops are capable of converting carbon dioxide and water into carbohydrates
Ques. Photorespiration occurs in
(a) Mitochondria
(b) Ribosomes
(c) Peroxisomes
(d) Lysosomes
Ques. Which of the following plant shows chloroplast dimorphism?
(a) Wheat
(b) Rice
(c) Sugar beet
(d) Sugarcane
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Ques. First product of photorespiration is
(a) Phosphoglycolate
(b) Glycolate
(c) Glycerine
(d) None of these
Ques. Complete girdling ultiamtely kills the tree due to
(a) Starvation of root
(b) Stoppage of photosynthesis
(c) Nonmovement of minerals
(d) Nonmovement of water.
Ques. Core metal of chlorophyll is
(a) Cu
(b) Mg
(c) Fe
(d) Ni
Ques. ATP formation during photosynthesis is
(a) Phosphorylation
(b) Photophosphorylation
(c) Oxidative phosphorylation
(d) None of these
Ques. Photosynthetic pigments found in the chloroplasts occurs in
(a) Thylakoid membranes
(b) Plastoglobules
(c) Matrix
(d) Chloroplast envelope
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Ques. Chlorophylls absorb visible light of wavelengths
(a) 400-500 nm only
(b) 300-400 nm only
(c) 600-800 nm only
(d) 400-500 nm and 600-700 nm
Ques. The law of limiting factors for photosynthesis was enunciated by
(a) R. Hill
(b) Calvin
(c) Krebs
(d) Blackman
Ques. Loading of phloem means
(a) Elongation of phloem cells
(b) Separation of phloem parenchyma
(c) Strengthening of phloem fibres
(d) Pouring of sugar into phloem
Ques . Photorespiration is favoured by
(a) High oxygen and low carbon dioxide
(b) High carbon dioxide and low oxygen
(c) High temperature and low oxygen
(d) High humidity and temperature
Ques. Translocation of carbohydrate nutrients usually occurs in the form of
(a) Glucose
(b) Maltose
(c) Starch
(d) Sucrose
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Ques. ATP is
(a) Adenine triphosphate
(b) Adenosine tetraphosphate
(c) Adenosine triphosphate
(d) Adenine tetraphosphate
Ques. Kranz anatomy occurs in
(a) Leaves
(b) Stem
(c) Flower
(d) Seed
Ques. Calvin cycle is
(a) Dependent upon light
(b) Independent of light
(c) Supported by light
(d) Hindered by light
Ques. Condition favouring cyclic photophosphorylation is
(a) Anaerobic environment
(b) Aerobic and low light intensity
(c) Aerobic and optimum light
(d) Anaerobic and low light intensity
Ques. What is true for photosynthesis ?
(a) Both carbon dioxide and water are oxidised
(b) Both carbon dioxide and water are reduced
(c) Carbon dioxide is oxidised and water reduced
(d) Carbon dioxide is reduced and water oxidised
Ques. Light energy is converted into chemical energy in the presence of
(a) Chloroplasts
(b) Pyrenoids
(c) Ribosomes
(d) Mesosomes
Ques. Which element is required photosynthetic evolution of oxygen ?
(a) Cu
(b) Fe
(c) Zn
(d) Mn
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Ques. Special feature of C4Â plants is
(a) Thin cuticle
(b) Multilayered epidermis
(c) Kranz anatomy
(d) Both (a) and (b)
Ques. Which one is product in respiration and reagent in photosynthesis ?
(a) O2
(b) CO2
(c) CO
(d) N2
Ques. Plants purify air during
(a) Photosynthesis
(b) Respiration
(c) Transpiration
(d) Desiccation
Ques. Maximum starch is manufactured by
(a) Spongy parenchyma
(b) Palisade parenchyma
(c) Guard cells
(d) Vascular tissue
Ques. In C4 plants, carbon dioxide fixation occurs in chloroplasts of
(a) Palisade tissue
(b) Spongy parenchyma
(c) Guard cells
(d) Hypodermis and chlorenchyma
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Ques. In C4 plants synthesis of sugars/final CO2 fixation occurs in
(a) Undifferentiated mesophyll cells
(b) Bundle sheath cells
(c) Epidermal cells
(d) Spongy cells
Ques. The autumn colouration of leaves is precisely due to
(a) Zeaxanthin
(b) Violaxanthin
(c) Neoxanthin
(d) All of these
Ques. One of the common Hill reagents is
(a) Benzoquione
(b) Plastoquinone
(c) Ferredoxin
(d) Plastocyanin
Ques. If the concentration of oxygen is increased, the photosynthetic rate decreases and the phenomenon is called as
(a) Emerson effect
(b) Blackman effect
(c) Pasteur effect
(d) Warburg effect
Ques. Greatest producers of organic matter are
(a) Crop plants
(b) Forests
(c) Plants of the land area
(d) Phytoplankton of oceans
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Ques. Dark reaction of photosynthesis is
(a) Hill reaction
(b) Calvin cycle
(c) Cyclic photophosphorylation
(d) N oncyclic photophosphorylation
Ques. Photolithotrophs (photoautotrophs) obtain energy from
(a) Radiations and carbon from inorganic compounds
(b) Radiations and carbon from organic compounds
(c) Organic compounds
(d) Inorganic compounds
Ques. ATP formation in chloroplast and mitochondrion is explained by
(a) Cholodny-Went model
(b) Chemi-osmotic theory of Mitchell
(c) Munch’s mass flow theory
(d) Relay pump theory of Godlewski
Ques. Energy from light reaction is transferred to dark reaction in the form of
(a) ADP
(b) ATP
(c) Chlorophyll
(d) RuBP
Ques. Food is transported to diferent parts of plant through
(a) Xylem
(b) Phloem
(c) Pith
(d) Cortex
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Ques. The site for light reaction is
(a) Grana
(b) Stroma
(c) ER
(d) Cytoplasm
Ques. Nine-tenth of all photosynthesis of world (85-90%) is carried out by
(a) Large trees with millions of branches and leaves
(b) Algae of the ocean
(c) Chlorophyll containing ferns of the forest
(d) Scientists in the laboratories
Ques. In which of the following groups of organisms the food material is broken down outside the body as absorbed?
(a) Mushroom, Green plants, Amoeba
(b) Yeast, Mushroom, Bread mould
(c) paramecium, Amoeba, Cuscutta
(d) Cuscuta, Lice, Tapeworm
Ques. The opening and closing of the stomatal pores depends upon:
(a) oxygen
(b) water in guard cells
(c) temperature
(d) concentration of CO2 in stomata
Ques. Which of the following events does not occur in photosynthesis?
(a) conversation of light energy into chemical energy
(b) reduction of carbon dioxide to carbohydrates
(c) oxidation of carbon to carbon dioxide
(d) absorption of light energy by chlorophyll
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Ques. When carrying out the starch test on a leaf, why is it important to boil the leaf in alcohol?
(a) to dissolve the waxy cuticle
(b) to make the cells more permeable to iodine solution
(c) to remove the chlorophyll
(d) to stop chemical reactions in the cells
quite understandable