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13 terms

Chapter 8 Photosynthesis

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autotroph
organisms such as plants, which make their own food
heterotroph
organisms such as animals, that cannot use the sun's energy directly; obtain energy from the foods they consume
adenosine triphosphate (ATP)
one of the principal chemical compounds that cells use to store and release energy
photosynthesis
plant use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates-sugars and starches-and oxygen, a waste product
pigment
light-absorbing molecule plants gather
chlorophyll
the plant's principal pigment
thylakoid
saclike photosynthetic membranes in chloroplasts
photosystem
clusters where proteins in the thylakoid membrane organize chlorophyll and other pigments
stroma
the region outside the thylakoid membranes
NADP+
carrier molecule that accepts and holds 2 high-energy electrons along with a hydrogen ion
light-dependent reactions
reactions that require light
ATP synthase
protein in cell membrane that spans the membrane and allow H+ ions to pass through it
Calvin cycle
when plants use the energy that ATP and NADPH contain to build high-energy compounds that can be stored for a long time