Electromagnetic Spectrum

Question 1

Do plants absorb light across the same spectrum that human eyes detect?

Answer 1

Yes

Question 2

Short wavelengths are more or less energetic?

Answer 2

More

Question 3

Long wavelengths are more or less energetic?

Answer 3

Less

Question 4

What does chlorophyll do?

Answer 4

Creates green pigment, allows skin tone pigment

Question 5

What does b-carotene do?

Answer 5

Allows orange pigment

Question 6

What does xanthrophyll do?

Answer 6

Allows yellow pigment

Question 7

What does Anthrocyanins do

Answer 7

Allows blue and purple pigment

Question 8

Where are pigments?

Answer 8

Embedded in the thylakoid membrane

Question 9

What are pigment clusters called?

Answer 9

Photosystems

Question 10

What is an action spectrum?

Answer 10

The efficiency of a pigment at absorbing light

Question 11

Where are photosystems?

Answer 11

Embedded within the thylakoid membrane

Question 12

What is a photosystems made of?

Answer 12

Chlorophyll molecules, accessory pigments, and proteins

Question 13

What does a photosystems do?

Answer 13

Releases and transfers excited electrons to ETC

Question 14

How many photosystems are there?

Answer 14

2

Question 15

What is photosystems 1?

Answer 15

The first to evolve

Also called p700 as it effectively absorbs wavelengths of 700m

Question 16

What is photosystem 2v

Answer 16

Evolved later

Also called p680 as it effectively absorbs wavelengths of 680m

Question 17

How does a plant produce sugar?

Answer 17

Using both photosystems

Question 18

How many p700 compared to p680?

Answer 18

Equal amount

Question 19

How do photosytems harvest energy from light?

Answer 19

Light energy is passed from antenna chlorophyll to the next in a random order until it reaches reaction center
Reaction center ejects electron into another electron acceptor
Electron enters ETC of thylakoid