6.1. Photosynthesis
A subsection of Biology, 5090, through 6. Plant nutrition
Listing 10 of 147 questions
In , curve P shows carbon dioxide uptake and release by a plant during a twelve-hour period between 12.00 hours and 24.00 hours. 12.00 time of day / hours CO2 uptake / arbitrary units CO2 release / arbitrary units 18.00 24.00 Q P Name the process mainly responsible for the shape of graph P from 12.00 hours to 16.00 hours. State the time at which there is no net movement of carbon dioxide into or out of the plant. Explain the shape of the curve after this time. Name a factor that might cause the curve to appear like curve Q rather than curve P in . On , draw a curve to show the uptake and release of oxygen by the plant during the same period of time. Label your axis in the spaces provided on .
5090_w09_qp_2
THEORY
2009
Paper 2, Variant 0
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Two test-tubes, P and Q, were set up each containing a solution of red hydrogen carbonate indicator. Hydrogen carbonate indicator turns yellow when the carbon dioxide concentration increases and turns purple if the carbon dioxide concentration decreases. An aquatic plant was placed into tubes P and Q. Tube P was uncovered, tube Q was covered with a black lightproof cover. The tubes were left in a warm room in sunlight for four hours. tube P tube Q green aquatic plant black lightproof cover What would be the colour of the hydrogen carbonate indicator in the two tubes after four hours?
5090_w11_qp_11
MCQ
2011
Paper 1, Variant 1
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Questions Discovered
147