Chapter 7

• their own food via photosynthesis

1. Normally, don't consume organic molecules from other organisms 

• Autotrophs
• Heterotrophs
• Decomposers
• Carnivores

use light energy to produce organic molecules

• Cellular respiration
• Fermentation
• Decomposition
• Photoautotrophs

prokaryotes that use inorganic chemicals as their energy source

• Phototrophs
• Heterotrophs
• Autotrophs
• Chemolithotrophs

consumers that feed on plants, animals, and decomposed organic matter

• Heterotrophs

• herbivores
• carnivores
• decomposers

the redox reaction of cellular respiration, it occurs in 2 metabolic stages, what are these stages

• Electron transport chain and photosynthesis
• Glycolysis and lactic acid fermentation
• Light and the calvin cycle

• Fermentation and oxidative phosphorylation

occurs in the thylakoid membrane

Water is split into H+ and O2

ATP is generated from ADP and P

Light energy is absorbed: NADP+ → NADPH

NADPH produced provides electrons for reducing carbon in the Calvin cycle

• Calvin cycle
• Light-independent reactions
• Photosystem II
• Light-dependent

occurs in the stroma

Cc is a series of cyclic reactions that assemble sugars from CO2 + energy

Called carbon fixation

Need enzyme

Referred to as the dark reactions- no light needed

• Krebs cycle
• Electron transport chain
• Calvin cycle
• Photosystem II

Takes place in chloroplasts

Corners CO2 and H2O into organic molecules and releases oxygen

• Fermentation
• Cellular respiration
• Nitrogen fixation
• Photosynthesis

The key light-absorbing pigment in chloroplasts

Responsible for the green color of plants

Key role in converting sunlight into chemical energy

• carotene
• anthocyanin
• chlorophyll
• xanthophyll

Concentrated in the cells of the mesophyll, green tissue inside the leaf

• Stomata
• Chloroplasts

• Xylem
• Phloem