lab quiz 5 Flashcards

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1
Q

green chlorophylls usually./…

A

capture the majority of light used in photosynthesis

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2
Q

chlorophyll is polar or non polar

A

polar

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3
Q

carotenoids are part of a larger collection of plant-derived compounds called

A

terpenes

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4
Q

compound responsible for the red coloring of tomatoes and watermelon?

A

lycopene

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5
Q

compound responsible for orange of carrots?

A

Beta carotene

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6
Q

what do carotenoids do for the human body?

A

act as antioxidants and antiflammatories

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7
Q

lycopene and beta carotene are examples of

A

carotenoids

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8
Q

what is xanthopylls ?

A

oxidized versions of carotenes

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9
Q

what is pheophytins?

A

look like chlorophyll but the magnesium ion is replaced by two hydrogen ions

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10
Q

light absorption spectra

A

the absorption of light at different wavelengths permits the analysis of quantities, types, and efficiency of pigments present in leaves

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11
Q

TLC can do what

A

can confirm presence or absence of various pigments

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12
Q

what happens to light not absorbed in photosynthesis?

A

reflected or transmitted

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13
Q

absorption spectrum for an individual pigment:

A

amount of light energy at various wavelengths which is absorbed by that pigment

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14
Q

what does the spectrophotometer measure?

A

proportion of light at a specific wavelength which is absorbed or transmitted

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15
Q

chromatography is a term for:

A

methods of separating molecules (pigments) from each other

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16
Q

what is coated on the TLC plate

A

silicon gel which is polar

17
Q

bottom of TLC plate is placed in

A

a mixture of solvents which is less polar than the silica gel

18
Q

nonpolar pigments on TLC plate

A

will dissolve rapidly in the non polar solvent

19
Q

polar pigments on TLC plate

A

will be attracted to the polar silica gel