Photosynthesis

Question 1

All living things need —– to survive

Answer 1

energy

Question 2

Almost all of the energy used by organisms comes from the —

Answer 2

sun

Question 3

Organisms that can use the sun to create food are called ————

Answer 3

autotrophs

Question 4

auto means

Answer 4

self

Question 5

troph means

Answer 5

feeding

Question 6

autotroph examples

Answer 6

:algae, plants, some protists and some prokaryotes

Question 7

Even organisms that are not autotrophs rely on autotrophs for energy either ——– (herbivores) or ——— (higher level consumers).

Answer 7

directly; indirectly

Question 8

heterotrophs

Answer 8

most get energy from the food they eat

Question 9

a series of complex chemical reactions that converts light energy from the sun into chemical energy in the form of organic compounds (i.e. carbohydrates)

Answer 9

photosynthesis

Question 10

The molecules used (reactants) during photosynthesis include:

Answer 10

Carbon Dioxide and Water

Question 11

The molecules created (products) include:

Answer 11

Glucose and Oxygen

Question 12

light energy is captured, the chemical energy is stored in energy carrying molecules (NADPH)

Answer 12

light reactions

Question 13

Organic Compounds are formed using Carbon Dioxide and then stored in ATP and NADPH

Answer 13

Calvin Cycle

Question 14

light reactions stage 1

Answer 14

-Begins with the chloroplasts absorbing the light
-The light reactions occur at the chloroplast

Question 15

a system of membranes that are arranged as flattened sacs.

Answer 15

Thylakoids-

Question 16

Each stack of thylakoids is connected and layered to form a stack called

Answer 16

grane (singular-granum)

Question 17

The —— is the solution that surrounds the grana

Answer 17

stroma

Question 18

space inside the thylakoids

Answer 18

lumen

Question 19

In the membrane of the thylakoid there are several ———

Answer 19

pigments

Question 20

A ——— is a compound that absorbs light

Answer 20

pigment

Question 21

Chlorophyll a

Answer 21

• the main photosynthesis pigment

Question 22

chlorophyll b

Answer 22

assist chlorophyll a in absorbing light shifted more towards the green spectrum. (accessory pigment)

Question 23

Carotenoids-

Answer 23

assist in light absorption (accessory pigments)

Question 24

Carotenoids become visible when

Answer 24

the cool fall temperatures cause the plants to stop the production of chlorophylls. (reflects yellow, orange, and brown)

Question 25

Photosystem-

Answer 25

a cluster of pigments molecules embedded in the thylakoid membrane

Question 26

know light reaction and its steps

Answer 26

:)

Question 27

ATP

Answer 27

The main energy currency. The light reactions create ATP through a process called chemiosmosis.

Question 28

Chemiosmosis:

Answer 28

works by using the concentration gradient across the thylakoid membrane. Inside of the thylakoid has a higher H+ (proton) concentration than the outside.

Question 29

ATP synthase complex

Answer 29

The protons then move through the ATP synthase complex converting ADP (adenosine diphosphate) to ATP (adenosine triphosphate).

Question 30

Oxygen during light reaction

Answer 30

Oxygen is produced from splitting H2O. Oxygen will diffuse out of the chloroplast and leave the plant.

Question 31

Overall products of light cycle

Answer 31

ATP and NADPH which are next used in the next set of reactions called the Calvin Cycle

Question 32

in light cycle what is NADP+ turned into

Answer 32

NADPH (an electron carrier)

Question 33

In light cycle what is ADP turned into

Answer 33

ATP through chemiosis

Question 34

What are the 2 stages of photosynthesis

Answer 34

The light cycle and calvin cycle

Question 35

Photosynthesis Formula

Answer 35

CO2 (Carbon Dioxide) + H2O (Water) + Sunlight = C6H12O6 (Sugar) + O2 (Oxygen)