Chapter 6: Photosynthesis Study Guide

Question 1

an organism that must get energy from food instead of directly from sunlight or inorganic substances

Answer 1

heterotroph

Question 2

an organism that uses energy from sunlight or from chemical bonds in inorganic substances to make organic compounds

Answer 2

autotroph

Question 3

the process of converting light energy from the sun into chemical energy in the form of organic compounds primarily carbohydrates.

Answer 3

photosynthesis

Question 4

Photosynthesis equation

Answer 4

6CO2 + 6H20 –> C6H12O6 + 6O2

–> = light energy

Question 5

The 2 stages of photosynthesis

Answer 5

Light reactions and the Calvin Cycle

Question 6

Where do the light reactions occur?

Answer 6

The thylakoid membrane

Question 7

Where does the Calvin Cycle occur?

Answer 7

The stroma of the chloroplast

Question 8

organelles found in plants and algae where photosynthesis occurs

Answer 8

chloroplast

Question 9

a stack of thylakoids in a chloroplast

Answer 9

granum

Question 10

in plants, the solution that surrounds the thylakoids in a chloroplast

Answer 10

stroma

Question 11

a membrane system found within chloroplasts that contain the components for photosynthesis

Answer 11

thylakoids

Question 12

a compound that absorbs light

Answer 12

pigment

Question 13

The pigments found within thylakoids are __________ and ____________.


Answer 13

chlorophylls and carotenoids

Question 14

What colors of light does chlorophyll absorb?

Answer 14

red and blue

Question 15

What color of light does chlorophyll reflect?

Answer 15

green

Question 16

What colors of light do carotenoids absorb?

Answer 16

yellow, orange, and brown

Question 17

Where do light reactions occur?

Answer 17

in the thylakoids

Question 18

a cluster of pigment molecules and the proteins that the pigment molecules are embedded in

Answer 18

photosystem

Question 19

As electrons move down the electron transport chain they ____ ______.

Answer 19

lose energy

Question 20

The energy the electrons lose as they move down the electron transport chain is used to move ________ (H+) into the _________.

Answer 20

protons, thylakoid

Question 21

The electrons are replaced by electrons that have passed through the electron transport chain from ____________ ___.

Answer 21

photosystem II

Question 22

Products of the light reactions

Answer 22

NADPH and ATP

Question 23

Where do the NADPH and ATP produced in the light reactions go?

Answer 23

They go to the Calvin Cycle to be used for energy.

Question 24

as electrons travel along the electron transport chain, protons move into the thylakoid and build up a concentration gradient. The movement of protons and through ATP synthase results in the synthesis of ATP.

Answer 24

chemiosmosis

Question 25

a series of enzyme-assisted chemical reactions that produces a three-carbon sugar

Answer 25

Calvin Cycle

Question 26

What is produced by the Calvin Cycle?

Answer 26

3 RuBP molecules

Question 27

Leaves take in and release CO2 and release O2 through their ________.

Answer 27

stomata

Question 28

the many openings in a leaf or a stem of a plant that enable gas exchange to occur

Answer 28

stomata

Question 29

Factors that affect photosynthesis

Answer 29

light intensity, level of CO2, and temperature