In 1941, biologists exposed photosynthesizing cells to water containing a heavy oxygen isotope, designated 180. The "labelled" isotope appears in the 02 gas released in photosynthesis, showing that the oxygen came from water. Where would the 180 have ended up if the researcher had used 180-labeled CO2 instead of H2O? A. ADP B. NADP+ C. Rubisco D. DP and NADP+ E. Glucose

In 1941, biologists exposed photosynthesizing cells to water containing a heavy oxygen isotope, designated 180. The "labelled" isotope appears in the 02 gas released in photosynthesis, showing that the oxygen came from water. Where would the 180 have ended up if the researcher had used 180-labeled CO2 instead of H2O? A. ADP B. NADP+ C. Rubisco D. DP and NADP+ E. Glucose

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter5: Photosynthesis

Section: Chapter Questions

Problem 5RQ: What is the energy of a photon first used to do in photosynthesis? a. split a water molecule b....

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How are the NADPH and G3P molecules made during photosynthesis similar? a. They are both end products of photosynthesis. b. They are both substrates for photosynthesis. c. They are both produced from carbon dioxide. d. They both store energy in chemical bonds.
What molecule is split in the oxygen-releasing light reactions of photosynthesis? A. Water B. Chlorophyll C. Carbon dioxide D. NADPH
You are growing algae in culture and expose them to CO2 that contains radiolabeled oxygen. Where does the radiolabeled oxygen end up after photosynthesis? a. water b. oxygen c. carbon dioxide d. carbohydrates e. carbon monoxide
Using the graph comparing photosynthetic rate and absorption of different wavelengths of light, what can be concluded? a) The photosynthesis rate at 550 nm is the highest b) Chlorophyll a absorbs wavelengths at both ends of the spectrum c) Chlorophyll b is associated with the greatest rate of photosynthesis. d) Carotenoids absorb the narrowest range of wavelengths of light
To reduce six molecules of carbon dioxide to glucose via photosynthesis, how many molecules of NADPH and ATP are required? a. 6 NADPH and 6 ATP b. 12 NADPH and 12 ATP c. 12 NADPH and 18 ATP d. 18 NADPH and 12 ATP e. 24 NADPH and 18 ATP
Which of the following components is not used by both plants and cyanobacteria to carry out photosynthesis? a. chloroplasts b. chlorophyll c. carbon dioxide d. water
C.B. van Niel is famous for his discoveries regarding photosynthesis in sulfur bacteria. Which of the following statements is true of his experiments? a. Van Niel found that oxygen created by plants is derived from water, not carbon dioxide b. He found that sulfur bacteria do not use light, but instead use hydrogen sulfide as a source of energy for producing sugars. c. Sulfur bacteria used water to produce hydrogen sulfide d. From his observations, he reasoned that all producers require a hydrogen source, but that source can vary. e. Both a) and d)
The graph here shows the change in energy level for the reactants and the products of photosynthesis. Given the energy levels modeled in the graph, which statement accurately compares the energy of the products and the reactants with regards to photosynthesis? A. Water and Oxygen have the highest energy compared to glucose and and carbon dioxide B. Glucose and Oxygen gas have higher energy levels compared to water and carbon dioxide C. Glucose and water have the same energy levels compared to carbon dioxide and oxygen gas D. Glucose and oxygen have a lower energy energy level associated with them compared to carbon dioxide and water
Which is NOT an evolutionary adaptation of plants to minimize the costs of photorespiration while also conserving water on hot days? a. Use more ATP to incorporate CO2 into organic compounds, which increases CO2 concentration in the cell. b. Confine the Calvin cycle to specific cells in order to prevent inefficient rubisco binding and net energy loss. c. Binding O2 to rubisco instead of CO2. d. Uptake CO2 only at night and use ATP to fix it into organic acid for later use during the light reactions, which prevents water loss during the day.
Read and analyze the following statements. (i) One of the end products of photosynthesis is the raw material for respiration. (ii) One of the end products of respiration is the raw material for photosynthesis. A. (i) is wrong and (ii) is correct B. both (i) and (ii) are correct C. both (i) and (ii) are wrong D. (i) is correct and (ii) is wrong
Animal cells conduct: A. Cellular Respiration B. Photosynthesis C. Both Plant cells conduct: A. Cellular Respiration B. Photosynthesis C. Both
Both temperature and light intensity can affect the rate of photosynthesis. However, in this study, the investigator kept the temperature constant and only studied how changes in light intensity affected the rate of photosynthesis, Which of the following best explains the investigator's decision to only study light intensity? Select one or more: a. It is easier to control light intensity than it is to regulate temperature, therefore the investigator chose to measure only light intensity b. Light intensity affects the rate of photosynthesis more than temperature, therefore the investigator chose to measure only light intensity c. none of the answers is correct d. If different light intensities and different temperatures had been studied at the same time, it would not be possible to know which of these factors affected the rate of photosynthesis.