This preview shows page 1. Sign up to view the full content.
Unformatted text preview: ioletblue parts of the s pec trumto matc h the
emis s ion lev el in the y ellow partwould c hange the amount of ox y gen produc ed, and thus the number of bac teria that ac c umulated, in the red and
v ioletblue s pec tral regions . The c orrec ted ac tion s pec trum would s how higher peak s in the red and v ioletblue parts of the s pec trum, but the plot
in the y ellow part of the s pec trum would be approx imately the s ame as Engelmann’s . Interpreting Data: Absorption Spectra and Photosynthetic Pigments
Can y ou ans wer the following ques tions about photos y nthetic pigments and the wav elengths of light they abs orb?
Us e the abs orption s pec tra to ans wer the ques tions . se ssion.ma ste r ingbiology.c om/myc t/a ssignme ntPr intVie w? a ssignme ntI D= 2242937 12/41 13- 10- 13 Cha pte r 10 Part A
Approxim ately what wavelength of light is best absorbed by chlorophyll a, the pigm ent that participates directly in the light reactions?
One c annot tell from this graph. Correct Part B
Which wavelength of light is best absorbed by chlorophyll b?
One c annot tell from this graph. Correct Part C
You obtain the pigm ents called carotenoids in your diet when you eat carrots. Why do carotenoids appear yellow and orange?
ANSWER: se ssion.ma ste r ingbiology.c om/myc t/a ssignme ntPr intVie w? a ssignme ntI D= 2242937 13/41 13- 10- 13 Cha pte r 10
They abs orb y ellow and orange wav elengths bes t.
Their line on this abs orption s pec trum is c olored orange.
They abs orb blue/green light and reflec t y ellow and red wav elengths of light.
One c annot tell from this graph. Correct Part D
Can you tell from these absorption spectra whether red light is effective in driving photosynthesis?
Thes e abs orption s pec tra indic ate that green and y ellow wav elengths of light are muc h more effec tiv e than red light.
Bec aus e the abs orption s pec tra of the pigments are highes t in the purple/blu...
View Full Document
- Spring '14