Photosynthesis

Question 1

What molecules are most commonly broken down to make ATP?

Answer 1

Carbohydrates

Question 2

Where is energy stored in our food?

Answer 2

chemical bonds

Question 3

What molecule transfers energy from our food to our cells?

Answer 3

ATP

Question 4

How does ATP deliver energy?

Answer 4

A phosphate is removed which releases energy when the bond is broken forming ADP.

Question 5

What process do organisms use to make food in the absence of sunlight?

Answer 5

chemosynthesis

Question 6

What is the chemical equation for photosynthesis?

Answer 6

6CO2 + 6 H20 + sunlight -> C6H1206 + 6O2 *** note the numbers should be subscript

Question 7

What part of the electromagnetic spectrum contains visible light?

Answer 7

ROYGBIV

Question 8

What structure allows plants to take in carbon dioxide and release oxygen

Answer 8

stomata

Question 9

What are pigments?

Answer 9

molecules that absorb light

Question 10

What are the 2 most common types of pigments found in plants?

Answer 10

Chlorophyll a and B

Question 11

Why are plants green?

Answer 11

they absorb all wavelengths except green which is reflected

Question 12

What is the function of accessory pigments?

Answer 12

allows plants to capture green light

Question 13

What are carotenoids?

Answer 13

yellow-orange pigments

Question 14

What are anthocyanins?

Answer 14

red-purple pigments

Question 15

What molecules stores the most energy in your body?

Answer 15

fat

Question 16

What molecule does your body break down last for energy?

Answer 16

Protein

Question 17

What organelle contains chlorophyll?

Answer 17

chloroplasts

Question 18

Why do leaves change color in the fall?

Answer 18

chlorophyll is ususally the first pigment to break down allowing the accessory pigments to become visible

Question 19

Describe the structure of a chlorplast.

Answer 19

double membrane with stacks of thylakoids called grana surrounded by a fluid called stroma

Question 20

Why are the light-dependant reactions called dependant?

Answer 20

they can not occur without light

Question 21

Where do the light-dependent reactions take place?

Answer 21

on the thylakoid membrane

Question 22

What 2 things are needed (reactants) during the light dependant reactions?

Answer 22

water and sunlight

Question 23

What are photosystems?

Answer 23

clusters of pigments that absorb light energy

Question 24

What happens to the electrons in the photosystem when it absorbs light?

Answer 24

they get excited

Question 25

Where do the electron go once they have left the photosystems?

Answer 25

electron transport chain

Question 26

Where does the photosystem get replacedment electrons?

Answer 26

splitting of water

Question 27

Where does the oxygen you breath come from initally?

Answer 27

water

Question 28

What is the role of NADP+ in the light dependant reactions?

Answer 28

carries the electrons from the light-dependent reactions to the calvin cycle? (energy delivery trucks)

Question 29

What is the function of ATP synthase?

Answer 29

enzyme that makes ATP

Question 30

Where does the ATP deliver the energy?

Answer 30

calvin cycle

Question 31

Where does the calvin cycle take place?

Answer 31

stroma

Question 32

What 3 things are needed (reactants) during the calvin cycle?

Answer 32

CO2, ATP, NADPH

Question 33

What is the final produce of the calvin cycle?

Answer 33

glucose

Question 34

What 4 factors effect the rate of photosynthesis?

Answer 34

temperature, light intensity, water, carbon dioxide

Question 35

Why does increased temperture only speed up photosynthesis to a certain extent?

Answer 35

if it gets too hot the proteins will denature and the chemcial reactions will stop

Question 36

What effect does increasing light intensity have on the rate?

Answer 36

speeds it up

Question 37

What effect does decreasing water have on the rate?

Answer 37

slows in down

Question 38

What effect does increasing CO2 have on the rate?

Answer 38

speeds it up