Section: 2.9 Biology
Why is the action spectrum for photosynthesis similar to the absorption spectra of photosynthetic pigments?
Only wavelengths of light absorbed by pigments can be used in photosynthesis.
Where is the oxygen we breathe in produced from?
From water used in the photolysis reaction
Which type of light is least useful for photosynthesis in terrestrial plants?
Green
The photosynthetic action spectrum of Halobacterium is exactly complementary (opposite to) the action spectrum for green plants. What wavelengths of light do the Halobacterium photosynthetic pigments absorb?
Green and yellow
What is the energy absorbed by chlorophyll used directly for in plants? I. To produce ATP II. To split water III. To fix CO2
I and II only
Which of the following factors influence(s) the rate of photosynthesis? I. Temperature II. Wavelength of light III. Number of mitochondria
I and II only
How is oxygen produced during photosynthesis?
Water molecules are split with energy from light.
What is the source of the oxygen released into the air as a product of photosynthesis?
Water only
Which of the following best describes photolysis?
2H2O + photons → 4e- + 4H+ + O2
Which of the following equations sums up photosynthesis?
6CO2 + 6H2O → C6H12O6 + 6O2
What is needed in photosynthesis to convert carbon dioxide into organic molecules?
ATP and hydrogen from the splitting of water.
Which of the following is wrong about chromatography?
Although both have the same type of stationary phase, thin layer chromatography uses a different principle than paper chromatography.
A plant has a unique photosynthetic pigment. The leaves of this plant appear to be yellow. Which wavelengths of visible light are being absorbed by this pigment?
Blue and red
compare cellular respiration with photosynthesis
Cellular respiration uses O2 produces CO2 produces H2O Photosynthesis produces O2 uses CO2 uses H2O
Name the stationary phase in paper chromatography.
Chromatography paper
A plant is exposed to increasing light intensity from very dim to bright light, while the carbon dioxide concentration and temperature are kept at an optimum level. What will happen to the rate of oxygen production?
It will increase exponentially and then level off.
Why do leaves of plants look green?
Most of the red and blue light is absorbed by chlorophyll and most of the green light is reflected.
Which of the following is false about the Calvin cycle?
The Calvin cycle is a cycle of chemical reactions where O2 is the starting material for the production of carbohydrates.
Which of the following is true about the limiting factors of photosynthesis?
The rate of photosynthesis is directly proportional to light intensity up to a certain point.
In which process of photosynthesis is light directly involved?
The splitting of water
