Chapter 7

Question 1

Cyclic electron transport

Answer 1

An electron transport pathway associated with photosystem 1 in photosynthesis that produces ATP without the synthesis of NADPH

Question 2

Photorespiration

Answer 2

A process that metabolizes a by-product of photosynthesis

Question 3

Photosystem 1

Answer 3

In photosynthesis, a protein complex in the thylakoids membrane that uses energy absorbed from sunlight to synthesize NADPH

Question 4

Photosystem 2

Answer 4

A protein complex in the thylakoids membrane that uses energy absorbed from sunlight to synthesize ATP

Question 5

Photo phosphorylation

Answer 5

The synthesis of ATP coupled to the transfer of electrons energized by photons of light

Question 6

Primary producers

Answer 6

An autotroph, usually a photosynthetic organism, a member of the first tropic level

Question 7

Photosystems

Answer 7

A large complex into which the light absorbing pigments for photosynthesis are organized with proteins and other molecules

Question 8

Photo autotrophs

Answer 8

A photosynthetic organism that uses light as its energy source and carbon dioxide as its carbon source

Question 9

Action spectrum

Answer 9

Graph produced by plotting the effectiveness of light at each wave length in driving photosynthesis

Question 10

Absorption spectrum

Answer 10

A curve representing the amount of light absorbed at each wave length

Question 11

Photosynthesis

Answer 11

The conversion of light energy to chemical energy in the form of sugar and other organic molecules

Question 12

Electron transfer system

Answer 12

Stage of cellular respiration in which high energy electrons produced from glycolysis, pryuvate oxidation and the citric acid cycle are delivered to oxygen by a sequence of electron carriers

Question 13

Reaction centre

Answer 13

Part of photosystems 1 and 2 in chloroplasts of plants. In light dependent reactions of photosynthesis, the reaction centre receives light energy absorbed by the antenna complex in the same photosystem

Question 14

Antenna complex

Answer 14

The sites at which light is absorbed and converted into chemical energy during photosynthesis, an aggregate of many chlorophyll pigments and a number of carotenoids pigments that serve as the primary use of absorbing light energy in the form of photons

Question 15

Light independent reactions

Answer 15

The second stage of photosynthesis, in which electrons are used as a source of energy to convert inorganic CO2 to an organic form. Also referred to as Calvin cycle

Question 16

Reduction

Answer 16

The additions of electrons to a substance

Question 17

Cam plants

Answer 17

A C4 plant that runs the Calvin cycle and C4 cycles at different times to circumvent photo respiration. CAM stand for crassulacean acid metabolism.