Thepeak abs orptionforc hlorophy llbis c los etothis

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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? ANSWER: 435 nm 525 nm 680 nm One c annot tell from this graph. Correct Part B Which wavelength of light is best absorbed by chlorophyll b? ANSWER: 400 nm 455 nm 540 nm 645 nm 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? ANSWER: 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...
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