Exam 3: Leaves and Chloroplasts Flashcards
Where in leaves does photosynthesis occur?
Mesophyll cells
In which part of the leaf does CO2 enter and O2 exit?
Stomata
How many membranes do chloroplasts have?
2
What are the flat sacs where the light-dependent reactions occur?
Thylakoids
What is a stack of thylakoids called?
Grana
What is the fluid-filled space between the thylakoids and the inner membrane?
Stroma
How many chloroplasts are in cells that do photosynthesis?
40-50
What are the two types of pigments?
Chlorophylls and Carotenoids
What colors does chlorophyll absorb and reflect?
Absorb red and blue, reflect green
What colors do carotenoids absorb and reflect?
Absorb blue and green, reflect red, yellow, orange
What is the structure of chlorophyll?
Head with magnesium at center, isoprenoid tail
What is the structure of a carotenoid?
One ring at each end of an isoprenoid chain
What are the two classes of chlorophyll?
a and b
What are the two classes of carotenoids?
Carotenes and xanthophylls
When an electron absorbs energy it is _____
excited
