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IGHS Winkels

Biology Chapter 8

TermDefinition
Autotrophs organisms such as plants that make their own food
Heterotrophs obtain energy from the food they consume (animals)
ATP (adenosine triphosphate) one of the principal chemical compounds that cells use to store and release energy
Photosynthesis plants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates and oxygen
Pigments light-absorbing molecules that help plants gather energy
Chlorophyll a plant's principal pigment
Thylakoids saclike photosynthetic membranes contained in chloroplasts
Photosystems clusters which are the light-collecting units of the chloroplast
Stroma the region outside the thylakoid membranes where the Calvin Cycle takes place
NADP+ NADP+ accepts and holds 2 high-energy electrons along with a hydrogen ion (H+). This converts the NADP+ into NADPH.
Light-dependent reactions require light to produce oxygen gas and convert ADP and NADP+ into ATP and NADPH
ATP synthase a protein in the cell membrane that spans the membrane and allows H+ ions to pass through it
Calvin Cycle plants use the energy that ATP and NADPH from the light-dependent reactions to produce high-energy sugars
Created by: Winkels