Question
The graph shows the absorption spectra of chlorophyll a and chlorophyll b.
What can be concluded from the graph?
A. Both chlorophyll a and chlorophyll b absorb a large amount of green light
B. Chlorophyll b absorbs red light more efficiently than blue light
C. Other pigments must absorb light between blue and red in the spectrum
D. Chlorophyll a and chlorophyll b have different absorption peaks
▶️Answer/Explanation
Markscheme
D
Question
What prevents plants from converting carbon dioxide into glucose in the dark?
A. They do not have a source of energy.
B. It is too cold.
C. They do not require glucose during the night.
D. Their enzymes are inhibited.
▶️Answer/Explanation
Markscheme
A
Question
The graph shows the relationship between rate of photosynthesis and light intensity as influenced by both temperature and CO2 concentration.
What conclusion can be drawn from the data in the graph?
A. CO2 is always the limiting factor at low light intensities and temperatures.
B. Light intensity is only the limiting factor at high light intensities.
C. Temperature is only the limiting factor at high light intensities and CO2 concentrations.
D. Both temperature and light intensity are limiting factors at 660 ppm CO2 and less than 200 W m–2 light intensity.
▶️Answer/Explanation
Markscheme
C