Photosynthesis I

Question 1

What is the first step of the conversion of light energy into ATP?

Answer 1

-Energy conversion of VISIBLE LIGHT photons by chlorophyll

Question 2

What is a Photon?

Answer 2

-Packet of light energy

Question 3

What is the relationship between a photon and their assigned wavelength?

Answer 3

• They’re inversely related

- A 450nm wavelength was MORE ENERGY than a 650nm one

Question 4

what does the photon energy “spark” when absorbed by the chlorophyll?

Answer 4

-It permits the removal of electrons from the water & shuttling protons and electrons in ways that drive ATP & reduce CO2

Question 5

What is Absorption Spectrum?

Answer 5

-The absorption of SPECIFIC wavelengths

Question 6

What 3 pigments did we use to measure the absorption of light?

Answer 6

• Carotene
• Chlorophyll a
• Chlorophyll b

Question 7

What solvent did we use to separate the Chlorophyll a pigment?

Answer 7

-Petroleum Ether

Question 8

What solvent did we use to separate Chlorophyll b pigment?

Answer 8

-Methanol

Question 9

What solvent did we use to separate Carotene pigment?

Answer 9

-Ethanol

Question 10

What is the Independent variable?

Answer 10

-Wavelengths of the extracts

Question 11

What is the Dependent variable?

Answer 11

-Absorbance of the extracts

Question 12

What is the relationship of the graph?

Answer 12

• There’s very high peaks at around 450nm
• Then it stoops down at around the 550nm
• Then it peaks up a little bit towards the end= 650nm

Question 13

What color is present at the 450nm wavelength?

Answer 13

-Blue

Question 14

What color is present at around the 550nm wavelength?

Answer 14

-Green

Question 15

What color is present at the 650nm wavelength?

Answer 15

-Red

Question 16

Why is there a lot of absorption around the 450nm wavelength?

Answer 16

-It’s on the shorter end of wavelength photons