2.9 Photosynthesis MCQS

The products of photosynthesis include

• water and carbon dioxide.

• glucose and oxygen.

• oxygen and carbon dioxide.

• carbon dioxide and glucose.

The energy that drives photosynthesis comes from

• the sun.

• geothermal heat.

• muscle contractions.

• chemical energy.

Light dependent reactions use light energy to produce

• ATP and oxygen.

• carbon dioxide.

• water and oxygen.

• glucose.

Longer wavelengths are at the _______ end of the visible light spectrum.

• blue

• red

This graph could represent (check all that apply:

• The effect of light intensity on the rate of photosynthesis.

• The effect of carbon dioxide concentration on the rate of photosynthesis.

• The effect of temperature on the rate of photosynthesis.

The plateau on this graph is due to

• another limiting factor is limiting rate of photosynthesis.

• the light is becoming too bright for photosynthesis to occur.

• the optimum light intensity has been reached.

T/F: If control variables limit photosynthesis, it may not be possible to see the impact of the limiting factor being investigated.

• true

• false

Select the two REACTANTS of photosynthesis.

• oxygen

• carbon dioxide

• glucose

• water

Select the two PRODUCTS of photosynthesis.

• oxygen

• carbon dioxide

• glucose

• water

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?

• CO2 is always the limiting factor at low light intensities and temperatures.

• Light intensity is only the limiting factor at high light intensities

• Temperature is only the limiting factor at high light intensities and CO2

  concentrations.

• Both temperature and light intensity are limiting factors at 660 ppm CO2 and

  less than 200 W m–2 light intensity.