Photosynthesis Flashcards
What occurs during light independent-reactions?
RuBP reacts with CO2 to form a 6C compound
Which of the following properties can affect the absorption of light by a pigment like chlorophyll?
The color of the pigment
During the light-dependent reactions, which option is an immediate consequence of the absorption of photons by the photosystem?
The excitation of electrons
What is the main advantage of using free-air carbon dioxide enrichment experiments (FACE) over enclosed greenhouse experiments to study the effects of elevated CO2 on photosynthesis?
They simulate real-world conditions more accurately, allowing for a better understanding of the effects of elevated CO2 on plants.
What is the main difference between absorption and action spectra?
Action spectra show the wavelengths of light that activate photosynthesis, absorption spectra display the wavelengths of light absorbed by a pigment.
Which of the following enzymes is involved in the light-dependent reactions?
ATP synthase
Which of the following is responsible for ATP production by chemiosmosis in thylakoids?
Electron Transport Chain
Where are photosystem arrays, such as photosystem II, embedded?
In the plasma membrane of chloroplasts
Name the process that generates electrons for use in the light-dependent reactions.
Photolysis
What happens in the light-dependent reactions of photosynthesis?
A proton gradient is generated in the thylakoid space.
What is needed in order to regenerate RuBP?
Phosphate groups
Which of the following is not true about light-dependent reactions?
Takes place in the stroma
Which of the following best describes the relationship between the light-dependent and light-independent reactions in photosynthesis?
The light-dependent reactions produce ATP and NADPH, which are used to power the light-independent reactions.
How does exercise affect the ventilation rate?
Increase in CO2 increases breathing rate.
Which statement is an inaccurate representation of chromatography?
Although both have the same type of stationary phase, thin layer chromatography uses a different principle than paper chromatography.
What is an advantage of different arrangements of pigment molecules in a photosystem within a leaf?
An increased probability of capturing light energy
Which of the following is an important enzyme involved in the fixation of carbon dioxide?
Rubisco
Which of the following processes is not part of the light-dependent reactions?
Carbon fixation
Name one product of the light-dependent reactions which is not needed for the light-independent reactions.
Oxygen
Which molecule is reduced by photosystem I during photosynthesis?
NADP+
Which of the following equations represents photolysis?
2H2O + photons → 4e– + 4H+ + O2
The energy absorbed by chlorophyll is used directly for what in plants?
To produce ATP
To split water
Which of the following equations represents photosynthesis?
6CO2 + 6H2O → C6H12O6 + 6O2
From which molecule(s) is oxygen released into the air as a product of photosynthesis?
Water
