Which of the following is NOT a light-harvesting pigment? Group of answer choices: chlorophyll a β-carotene phenolphthalein phycocyanobilin
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- Which of the following characteristics is NOT exhibited by phytochemicals? 1. reduce the risk of cataracts 2. inhibit activity of enzymes to activate carcinogens 3. reduce the risk of macular degeneration 4. act as antioxidantsWhat makes chlorophyll an effective photoreceptor? double bonds hydrophilic phytol group single bonds magnesium ion resonanceThe absence of ________ leaves obligate anaerobes susceptible to killing by oxygen. vitamin E superoxide dismutase peroxidase carotenoids catalase
- The following essential oils are not phototoxic: Choose one answer. a. fig leaf absolute b. steam distilled citrus c. cold pressed citrus d. angelica rootFor each pigment below tell me which colors and ranges of wavelengths it absorbs the most and which areas of the visible spectrum it absorbs the least. Some might have 2 peaks of high absorption. Chlorophyll a: Chlorophyll b: B-Carotene (carotenoids):Based on the absorption spectrum below, which of the following plant pigments does the graph represent? A.)Phycocetin (red algae)B.)ChlorophyllC.)Beta caroteneD.)Phycocyanin (cyanobacteria)
- Why does chlorophyll appears green to the human eye?There are plant pigments on the column and use a 10:1 dilution of hexanes to acetone as your mobile phase. Only one pigment shows on the column, which pigment is it? chlorophyll B lutein beta-carotene chlorophyll AChlorophyll is composed of a central porphyrin ring and a strongly hydrophobic phytol side chain. Which of the following correctly describes the function of the phytol side chain? absorbs visible light energizes an electron anchors the chlorophyll in the thylakoid membrane creates fluorescence
- . List the parts of the light reactions that are proteins. List the parts of the light reactions that are not proteins. This question is in reference to photosynthesis.Modified TRUE or FALSE. Write the word TRUE if the statement is correct. If the statement is false, write the incorrect underlined word/s and indicate the correct word/s to make the statement true. Chlorophyll a that is bright green in color is the pigment that initiates the light dependent reactions of photosynthesisWhich of the following is not involved in cyclic cyclic photophosphorylation? Group of answer choices: cytochrome bf complex plastocyanin ferredoxin P680