Unit C - Photosynthesis & Cellular Respiration Flashcards
Explain the basic structure of the leaf
Vascular bundle, stomata, palisade layer
What is the stomata? Where is it found
Pores in the leaf for gas exchange found mainly in the lower leaf
What is the palisade layer
Thick section of cells that contain chloroplasts
What are chloroplasts
Membrane-bound organelles in plant and Algal cells that carry out photosynthesis
What is photosynthesis
Process that converts light energy into chemical energy
Explain the structure of chloroplasts
Outer and inner membranes
-Interior space filled with semiliquid called stroma
• Within stroma are thylakoids
-Columns of thylakoids called Grana
• Adjacent Grana connected by unstacked thylakoids called lamellae
What is chlorophyll and where is it found
Chlorophyll is a pigment found in the thylakoid membrane
How many types of chlorophyll are there? What are they
Two types: chlorophyll a and chlorophyll B
What are the primary pigments involved in photosynthesis
Chlorophyll A and B
What color is chlorophyll a? What is it also called? Where is it found?
Blue green, also called P680, is found in photosystem II
What color is chlorophyll B? What is it also called? Where is it found?
Yellow green, also called P700, found in photosystem I
Why does chlorophyll appear green to our eyes
Chlorophyll A and B absorb pigments with energies in the blue-violet and red regions of the spectrum and reflect those with wavelengths that are green
What are Carotenoids and where are they found? What types of like today absorb and reflect? What do they do?
Hydrocarbons built into the thylakoid membrane. Absorb blue wavelengths reflect orange and yellow. They protect chlorophyll from light damage.
What is photoprotection?
When carotenoids accept energy from chlorophyll
Why do leaves in autumn appear red yellow and orange?
Plants stop producing chlorophyll molecules and disassemble those already in the leave when the temperature drops
