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Paper 2 Biological diversity > Energy for biological processed > Flashcards

Flashcards in Energy for biological processed Deck (7)
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1

Photosynthesis definition

The process by which energy, in the form of light (photon), is used to build up complex organic molecules eg glucose.

2

Respiration definition

The process by which organic molecules such as glucose are broken down into smaller inorganic molecules eg CO2 and H2O.

3

Equation for photosynthesis

6CO2 + 6H2O C6H12O6 + 6O2

4

Equation for respiration

C6H12O6 + 6O2 --> 6CO2 + 6H2O

5

Need for energy

- active transport (eg for sucrose loading into sieve tube cells, uptake of nitrates by root hair cells)
- anabolic reactions (eg building of polymers like proteins, polysaccharides, nucleic acids)
- movement (eg by cilia, flagella, or contractile filaments in muscle cells)

6

Importance of C-H bond

Bond energy = either exothermic or endothermic
Large molecules like glucose require less energy to be broken, while small inorganic molecules like CO2 and H2O require a lot of energy in order to be broken.

7

Chemiosmosis definition

The process by which protons diffuse from a region of high concentration to a region of low concentration through a partially permeable membrane. The movement of protons as they flow releases energy which can then be used to attach a Pi to ADP.