Photosynthesis Questions: Paper - 05

More Biology Questions

Photosynthesis Questions: Paper - 05


Sr. No.




A photosynthesizing plant is releasing 18O more than the normal. The plant must have been supplied with

(a) O3

(b) H2O with 18O

(c) CO2 with 18O

(d) C6H12O6 with 18O

Answer: (b)


A plant is kept in 300 ppm CO2 concentration. What will happen to it (Rajasthan PMT 1985)
(a) Plant will die soon 
(b) Plant will grow but will not die
(c) Plant will show normal photosynthesis 
(d) Respiration will be greatly decreased

Answer: (c)


Activation radiation for photosynthesis are represented by wavelength of (CBSE 1996)
(a) 640-650 nm
(b) 600-950 nm
(c) 400-700 nm
(d) 340-450 nm

Answer: (c)


Aganal chloroplasts occur in
(a) C3 plants
(b) Hydrophytes
(c) C4 Plants
(d) Succulents

Answer : (c)


All plastids have essentially same structure because
(CBSE 1992)
(a) They have to perform same function 
(b) They are localized in aerial parts of plants
(c) All plastids store starch, lipid and proteins 
(d) One type of platid can be differentiated into another type of plastid depending on cell requirements

Answer: (d)


Assimilatory power produced in hill reaction and used in Blackman’s reaction refers to
(a) Generation of ATP and NADPH2
(b) Reduction of CO2
(c) Splitting of water
(d) Disintegration of plastids

Answer : (a)


Which wavelength of light carries out photosynthesis in bacteria (Rajasthan PMT 1985)
(a) Ultraviolet light  
(b) Blue
(c) Red 
(d) Far red

Answer: (d)


ATP is a source of energy for
(a) Light reaction in C4 plants
(b) Photophosphorylation
(c) Biochemical reactions
(d) Photolysis of water

Answer : (c)


Bacterial photosynthesis contains
(a) PSI
(b) PSII
(c) Both PSI and PSII
(d) None of them

Answer : (a)


Bacteriochlorophyll differs from chlorophyll ‘a’ in having (CPMT 1989)
(a) One pyrrol with one hydrogen 
(b) One pyrrol with two hydrogen
(c) One pyrrol with three hydrogen
(d) One pyrrol with four hydrogen

Answer: (b)


Besides water and light, which is more essential as a raw material for food formation (BHU 1979)
(a) O2 
(b) CO2
(c) Mineral salts
(d) NAD

Answer: (b)


Both respiration and photosynthesis require
(a) Sunlight
(b) Green cells
(c) cytochromes
(d) Organic substrate

Answer : (c)


C4 cycle was discovered by
(a) Hill
(b) Calvin
(c) Hatch and slack
(d) Blackman

Answer : (c)


C4 plants are adapted to (AIIMS 1984)
(a) Hot ad dry climate 
(b) Temperate climate
(c) Cold and dry climate 
(d) Hot and humid climate

Answer: (a)


C4 plants belong to
(a) Gramineae
(b) Monocots
(c) Dicots
(d) Both monocots and Dicots

Answer : (d)


Calvin cycle occurs in (MP PMT 1996)
(a) Chloroplast
(b) Cytoplasm
(c) Mitochondria
(d) Glyoxysomes

Answer: (a)


Calvin cycle occurs in (BHU 1983)
(a) Chloroplasts
(b) Cytoplasm
(c) Mitochondria
(d) Glyoxysomes

Answer : (a)


Calvin’s cycle is found in (Raj. PMT 1997)
(a) Only C3 plants 
(b) Only photosynthetic plants
(c) All C4 plants 
(d) All photosynthetic plants

Answer: (d)


CAM photosynthesis occurs in plants with
(MP PMT 1993)
(a) Thin green leaves with reticulate venation 
(b) Thin green leaves with parallel venation
(c) Fleshy green leaves 
(d) Thin coloured leaves

Answer: (c)


Carbon dioxide is fixed in (MP PMT 1999)
(a) Light reaction
(b) Dark reaction
(c) Aerobic respiration
(d) Anaerobic respiration

Answer: (b)