Pearson eText for Biochemistry: Concepts and Connections -- Instant Access (Pearson+)
2nd Edition
ISBN: 9780137533114
Author: Dean Appling, Spencer Anthony-Cahill
Publisher: PEARSON+
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Chapter 15, Problem 13P
If algae are exposed to 14C02 for a brief period while illuminated, the labeled carbon is initially found almost entirely in the carboxyl group of 3- phosphoglycerate. However, if illumination is continued after the label pulse, other carbon atoms become labeled. Explain.
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- what does this picture indicate？why is it important？can someone explain pleasearrow_forward“Watermelon snow” in Antarctica is caused by a certain species of photosynthetic green algae that thrives in subzero temperatures (Chlamydomonas nivalis). These algae are also found in high-altitude, year-round snowfields. In both locations, Uv light levels tend to be high. Propose an explanation for why this alga appears reddish-pink.arrow_forwardIn a classic experiment in photosynthesis performed in 1883 by the German botanist Thomas Engelmann, he surrounded a filament of algae with oxygen-requiring bacteria. He then exposed the algal strand to the visible-light spectrum along its length. In which wavelengths of light along the algal strand would you expect the bacteria to cluster. Explain.arrow_forward
- Many pelagic Bacteria can use light energy but arenot considered “phototrophs” in the same sense ascyanobacteria or purple bacteria. Explain.arrow_forwardThe photosynthetic process used by the green sulfur bacteria, under anaerobic conditions, is best represented by which of the following balanced equations? cell bio 6CO2 + 12H2S C6H12O6 + 6S2 + 6H2O C6H12O6 + C6H12O6 C12H22O11 + H2O 6CO2 + 12H2O C6H12O6 + 6O2 + 6H2O C12H22O11 + H2O C6H12O6 + C6H12O6 C6H12O6 + 6O2 + 6H2O 6CO2 + 12H2Oarrow_forward1)Since bromelain is an endopeptidase, what types of bonds does it work on? 2)Since bromelain is an endopeptidase, what types of bonds does it work on?arrow_forward
- Why do reactions occur in stroma?arrow_forwardThe photosynthetic process used by the green sulfur bacteria, under anaerobic conditions, is best represented by which of the following balanced equations? 6CO2 + 12H2O C6H12O6 + 6O2 + 6H2O 6CO2 + 12H2S C6H12O6 + 6S2 + 6H2O C12H22O11 + H2O C6H12O6 + C6H12O6 C6H12O6 + C6H12O6 C12H22O11 + H2O C6H12O6 + 6O2 + 6H2O 6CO2 + 12H2Oarrow_forwardLabel chloroplast envelope Stroma Thylakoid Grana Granaarrow_forward
- Match the number of the label in the diagram (below) with the appropriate site or structure from the list that follows. e Ca e dependet aon water-piting comples plasticyanin label 1 label 3 e label 5 g label 7 a b label 2 d label 4 f label 6 81. stroma 82. photosystem I 83. photosystem II 84. thylakoid lumen 85. electron transport 86. cytochrome complex 87. ATP synthasearrow_forwardI have recently purchased a bottle of essential oil to be used as mosquito repellent. Classify the essential oil into the relevant group of secondary metabolites. Describe the distinctive scent produced and name the plant in which this essential oil could be (i) extracted. What are the roles of terpenes in plant defense and provide ONE (1) suitable solvent to be used for extraction? (ii)arrow_forwardTwo groups of tomatoes were grown under laboratoryconditions, one with humus added to the soil and one acontrol without humus. The leaves of the plants grownwithout humus were yellowish (less green) compared withthose of the plants grown in humus-enriched soil. The bestexplanation is that(A) the healthy plants used the food in the decomposing leavesof the humus for energy to make chlorophyll.(B) the humus made the soil more loosely packed, so waterpenetrated more easily to the roots.(C) the humus contained minerals such as magnesium andiron needed for the synthesis of chlorophyll.(D) the heat released by the decomposing leaves of the humuscaused more rapid growth and chlorophyll synthesis.arrow_forward
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