Chapter 5 Photosynthesis and Respiration Flashcards
Where does all life ultimately get their energy from?
the sun
What are autotrophs?
organisms that convert light or chemical energy into energy to make food
Where do autotrophs get their energy from?
the sun
What are heterotrophs?
organisms that must get energy from food
Where do heterotrophs get their energy from?
they consume other autotrophs or heterotrophs
Describe how photosynthesis and respiration are processes that depend on one another.
Photosynthesis gets light energy and converts it into sugars and respiration breaks down the sugar to make energy
What molecule is a source of energy for all cells?
ATP
Where does the light reaction take place?
thylakoid membrane of chloroplast
What are the products of the light reaction?
O2, ATP, and NADPH
Where does the calvin cycle take place?
stroma of chloroplast
What are the products of the calvin cycle?
NADPH, sugar, and ATP
What are pigments?
molecules that absorb certain colors and reflect the rest
Give examples of pigments.
Chlorophyll a, chlorophyll b, and carotenoids
Which two products of the light reactions of photosynthesis will be used for the calvin cycle?
ATP and NADPH
Why is the calvin cycle known as the “carbon-fixation” cycle?
carbon from CO2 is “fixed” into C6H12O6 (glucose)
