Do you know what is photosynthesis in plants? What are dark reactions and what are light reactions? Check out our online quiz to test yourself, prepare for an upcoming biology exam, or learn interesting facts.
Reductive, accompanied by the release of energy and catabolic
Reductive, requiring the absorption of energy and catabolic
Reductive, requiring the absorption of energy and anabolic
Reductive, accompanied by the release of energy and anabolic
Split carbon dioxide
Produce ATP and a reducing substance
Fix carbon dioxide
Combine carbon dioxide and water
It occurs in dark.
It does not require light energy.
It cannot occur during daytime.
It occurs more rapidly at night.
Quality of light
Intensity of Light
Duration of Light
Temperature
Killing the Algae and stopping biochemical reactions
Fixing CO2 gas to a solid sugar
Facilitating the action of enzymes
Having an enough time for building up hexose molecules
2 carbon atoms
3 carbon atoms
4 carbon atoms
6 carbon atoms
CO2
ATP
NADPH
Phosphoglyceraldhyde
Water splits
CO2 is reduced to organic compounds
Chlorophyll is activated
6 carbon sugar is broken down into 3 carbon sugar
6
24
12
4
It has Mg+2 as the central metal ion.
It has 55 atoms of carbon.
It is found in the stroma of chloroplast.
Its molecules are activated by light.
ATP and sugar
Hydrogen, O2 and sugar
ATP, hydrogen donor and O2
ATP, hydrogen and O2 donor
Red
Yellow
Green
Violet
They are arranged perpendicular to the leaf surface
Consists of one raw of cells
Are elongated parenchymatous cells
In between the cells there are wide intercellular spaces.
The xylem tissue lies toward the lower epidermis while the phloem towards the upper epidermis.
The phloem tissue translocates disolved organic food substances to the mesophyll
The xylem vessels are separated by thick-walled cells called xylem parenchyma
The midrib contains the main vascular bundle of the leaf.
Light intensity increases the rate of the light dependent reaction.
Increase in temperature till a certain limit, increases the rate of dark reactions.
Increase in Carbon dioxide concentration, increases the rate of light independent reactions.
Chloride ions increase the rate of Calvin cycle.
Van Niel
Blackman
Melvin Calvin
Scientists at California University
Its initial reactions occur in the presence of light.
The reactions will be inhibited by the presence of light.
They can occur during the day as well.
They utilize the products of the light reactions.
(D) ATP / (C ) NADH2 / (A) ADP / (B) AMP
(C ) hexose / (B) CO2 / (A) NADP / (B) ATP
(B) NADPH2 / (A) ADP / (D) NADP / (C ) ATP
(A) ADP / (D) NAD / (C ) ATP / (B) NADH2
Fix O2
Synthesize ADP
Fix CO2
Carry energy
8C
11C
12C
14C
Only a small quantity of ATP and NADPH2 is created.
Competition between oxygen and carbon dioxide for the active site on the enzyme carboxylase.
Competion between some limiting factors other than light.
Water is not sufficient for providing H+ ions that convert NADP to NADPH2.
No ATP production will take place.
The rate of splitting of water to release oxygen will decrease.
Chlorophyll molecules will not be activated.
Phosphoglyceraldehyde will not be formed.
Saprophytic
Parasitic
Phototrophic
Holozoic
(A) water / (B) hydrogen / (C) glucose
(A) water / (B) ADP / (C) ATP
(A) ADP / (B) enzymes / (C) NADP
(A) Hydrogen / (B) NADP / (C) glucose
There is no soil for fixing roots
The oxygen concentration is very high
The light intensity is very low
The carbon dioxide concentration is very low
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