Photosynthesis is a-
a. Biochemical process
b. Physical process
c. Chemical process
d. Physico-chemical process
Which of the following statements do not justify the importance of photosynthesis?
a. it is the primary source of all food on earth.
b. it is responsible for the release of oxygen into the atmosphere.
c. it is responsible for the water balance on earth.
d. use of energy from sunlight by plants doing photosynthesis is the basis of life on earth.
Which of the following is not required in photosynthesis?
The half-leaf experiment, where a part of the leaf is enclosed in a test tube containing some KOH soaked cotton was performed, which showed that _________ was required for photosynthesis?
Column – I Column - II
i.Jan Ingenhousz a. discovery of O2
ii. Joseph Priestley b. Plants restore to the air whatever breathing
animals and burning candles remove.
iii. T.W Englemann c. showed that only the green part of the plants could release oxygen.
iv. Julius von scahs d. discovery of production of glucose in plants
e. first action spectrum of photosynthesis.
f. Using a prism he split light into its spectral components and then
illuminated Cladophora, placed in a suspension of aerobic bacteria.
Which of the following shows the correct match?
a. i-c; ii-b; iii-a, e, f; iv-d
b. i-a, b; ii-c; iii-d; iv- e, f.
c. i-a; ii- b; iii- c, e; iv-f.
d. i-c, ii-a, b; iii-e, f; iv-d;
Cornelius van Niel, who, based on his studies demonstrated that photosynthesis is essentially a light-dependent reaction performed his experiments on-
b. purple and green bacteria
c. green algae
d. Non sulphur bacteria
Where does oxygen come from during photosynthesis?
a. Oxidation of water
b. Oxidation of glucose
c. Reduction of glucose
d. From CO2.
The correct equation, representing the overall process of photosynthesis is –
a. 6CO2 + 6H2O C6H12O6 + 6H2O + 6O2
b. 6CO2 + 6H2O C6H12O6 + 6O2
c. 6CO2 + 12H2O C6H12O6 + 6O2 + 6H2O
d. 6CO2 + 12H2O C6H12O6 + 6O2 + H2O
Which of the following statement is incorrect?
a. Oxygen is released from water
b. Photosynthesis is a single step reaction
c. Action spectrum of photosynthesis resembles roughly the absorption spectra of chlorophyll a and b.
d. In plants glucose is stored as starch.
Where does photosynthesis takes place?
a. in green leaves
b. in green parts of plant
c. in leaves
d. in complete plant