Chapter 5 - Photosynthesis (Vocab)

Question 1

Photoautotroph

Answer 1

An organism that makes its own food using energy from the sun

Question 2

Light Dependent Reactions

Answer 2

The first stage of photosynthesis during which water molecules are split as light energy is absorbed and transformed into chemical energy in ATP and NADPH

Question 3

Calvin Cycle

Answer 3

The second stage of photosynthesis that uses ATP and NADPH to convert CO2 into sugars

Question 4

Primary Electron Acceptor

Answer 4

A molecule capable of accepting and becoming reduced during photosynthesis

Question 5

Antenna Complex

Answer 5

A cluster of light absorbing pigments embedded in the thylakoid membrane able to capture and transfer energy to special chlorophyll a molecules in the reaction centre

Question 6

Reaction Centre

Answer 6

A complex of proteins and pigments that contains the primary electron acceptor

Question 7

Absorption Spectrum

Answer 7

A plot of the amount of light energy of various wavelengths that a substance absorbs

Question 8

Action Spectrum

Answer 8

A plot of the effectiveness of light energy of different wavelengths in driving a chemical process

Question 9

Photosystem I

Answer 9

A collection of pigment proteins that contains chlorophyll a molecules that absorb light at 700 nm

Question 10

Photosystem II

Answer 10

A collection of pigment proteins that includes chlorophyll a and absorbs light at 680 nm