Photosynthesis

Question 1

A graph of light absorption versus wavelength of light; shows how much light is absorbed at each wavelength

Answer 1

Absorption Spectrum

Question 2

A graph of a biological process versus light wavelength; shows which wavelengths are involved in the process

Answer 2

Action Spectrum

Question 3

An organism that is capable of living exclusively on inorganic materials, water, and some energy source such as sunlight or chemically reduced matter

Answer 3

Autotrophs

Question 4

In photosynthesis, a group of different molecules that cooperate to absorb light energy and transfer it to a reaction center

Answer 4

Antenna Systems

Question 5

Part of a tissue that surrounds the veins of plants; contains chloroplasts in C4 plants

Answer 5

Bundle Sheath Cells

Question 6

Plants that produce 3PG as the first stable product of carbon fixation in photosynthesis and use ribulose bisphosphate as a CO2 receptor

Answer 6

C3 Plants

Question 7

Plants that produce oxaloacetate as the first stable product of carbon fixation in photosynthesis and use phosphoenolpyruvate as CO2 acceptor

Answer 7

C4 Plants

Question 8

The stage of photosynthesis in which CO2 reacts with RuBP to form 3PG, 3PG is reduced to a sugar, and RuBP is regenerated, while other products are released to the rest of the plant

Answer 8

Calvin Cycle

Question 9

An enzyme that catalyzes the addition of carboxyl groups to a substrate

Answer 9

Carboxylase

Question 10

A yellow, orange, or red lipid pigment commonly found as an accessory pigment in photosynthesis; also found in fungi

Answer 10

Carotenoids

Question 11

any of several green pigments associated with chloroplasts or with certain bacterial membranes; responsible for trapping light energy for photosynthesis

Answer 11

Chlorophyll a/b

Question 12

A metabolic pathway enabling the plants that possess it to store carbon dioxide at night and then perform photosynthesis during the day with stomata closed

Answer 12

CAM Plants

Question 13

In photosynthetic light reactions, the flow of electrons that produces ATP but no NADPH or O2

Answer 13

Cyclic Electron Transport

Question 14

A self-propagating wave that travels through space and has both electrical and magnetic properties

Answer 14

Electromagnetic Radiation

Question 15

An organism that requires preformed organic molecules as food

Answer 15

Heterotrophs

Question 16

The initial phase of photosynthesis, in which light energy is converted into chemical energy

Answer 16

Light Reactions

Question 17

The phase of photosynthesis in which chemical energy captured in the light reactions is used to drive the reduction of CO2 to form carbohydrates

Answer 17

Light Independent Reactions

Question 18

Relative loss of electrons in a chemical reaction; either outright removal to form an ion, or the sharing of electrons with substances having a greater affinity for them

Answer 18

Oxidation

Question 19

An enzyme that catalyzes the addition of oxygen to a substrate from O2

Answer 19

Oxygenase

Question 20

A quantum of visible radiation; a packet of light energy

Answer 20

Photons

Question 21

Light-driven uptake of oxygen and release of carbon dioxide, the carbon being derived from the early reactions of photosynthesis

Answer 21

Photorespiration

Question 22

A light-harvesting complex in the chloroplast thylakoid composed of pigments and proteins

Answer 22

Photosystem

Question 23

In photosynthesis, the complex that absorbs light at 700nm, passing electrons to ferrodoxin and then to NADPH

Answer 23

Photosystem I

Question 24

In photosynthesis, the complex that absorbs light at 680nm, passing electrons to the electron transport chain in the chloroplast

Answer 24

Photosystem II

Question 25

Photosynthetic pigment that absorbs red, yellow, orange, and green light and is found in cyanobacteria and some red algae

Answer 25

Phycobilins

Question 26

A substance that absorbs visible light

Answer 26

Pigments

Question 27

A group of electron transfer proteins that receive energy from light-absorbing pigments and convert it to chemical energy by redox reactions

Answer 27

Reaction Center

Question 28

Gain of electrons by a chemical reactant; any reduction is accompanied by an oxidation

Answer 28

Reduction

Question 29

Contraction of ribulose biphosphate carboxylase/oxygenase, the enzyme that combines corbon dioxide or oxygen with ribulose biphosphate to catalyze the first step of photosynthetic carbon fixation or photorespiration, respectively

Answer 29

Rubisco

Question 30

The distance between successive peaks of a wave train, such as electromagnetic radiation

Answer 30

Wavelength