Exam 3_Openstax Chapter 5 Flashcards
Mesophyll
the middle layer of a leaf where photosynthesis takes place.
Stomata
where gas exchange of CO2 and oxygen takes place
Photosynthesis in all autotrophic eukaryotes take place in the …?
Chloroplast
Thylakoids
Granum
Stroma
Are stomata located on the upper epidermis or lower epidermis?
Lower
Photosynthesis takes place in two stages:
the light-dependent reactions and the Calvin cycle.
What happens in light-dependent reactions.
takes place in thylakoid membrane, chlorophyll absorbs energy from sunlight and then converts it into chemical energy with the use of water.
What is the by product of the light dependent reaction?
oxygen, from the hydrolysis of water as a byproduct
Where does the Calvin cycle take place?
The stroma
What happens in the Calvin cycle?
the chemical energy derived from the light-dependent reactions drives both the capture of carbon in carbon dioxide molecules and the subsequent assembly of sugar molecules.
What do the light-dependent reactions and the Calvin cycle use to transport the energy from one to the other?
carrier molecules
Wavelength
distance between two similar points in a wave, like crest to crest
Electromagnetic Spectrum
the range of all possible wavelength of radiation.
What kind of light do pigment molecules absorb in photosynthesis?
Visible light
Do pigments absorb or reflect the color of light they cannot absorb?
they reflect
Chlorophylla à
green color, most common pigment in photosynthetic organisms
What colors do chlorophyll a absorb?
blue and red
What kind of light does Chlorophyll b absorb?
blue and red-orange light
Absorption Spectrum
the color of light that a type of pigment absorbs
The light dependent reaction creates energy that is used to make what in the Calvin cycle?
Sugar molecules
What are the photosystems composed of?
pigment molecules and proteins
Where do photosystems exist?
membranes of thylakoids
How many photons is absorbed by a pigment molecule in the photosystem?
1
What is considered a packet of light energy in a photsystem?
a photon