A scientist is using a species of green algae to study electron transport chain in photosynthesis. He uses a laser to inactivate all of chlorophyll A in the algae, but leaves chlorophyll B intact (case 1). In a separate experiment, the scientist applies a chemical to the algae that inhibits PS I but does not affect PS II (case 2). Which of the following results is expected? In case 1, only PS I completely loses function; in case 2, no proton gradient is produced. In case 1, only PS I completely loses function; in case 2, a proton gradient is still produced. In case 1, both PS I and PS II completely lose function; in case 2, no proton gradient is produced. In case 1, both PS I and PS II completely lose function; in case 2, a proton gradient is still produced.

A scientist is using a species of green algae to study electron transport chain in photosynthesis. He uses a laser to inactivate all of chlorophyll A in the algae, but leaves chlorophyll B intact (case 1). In a separate experiment, the scientist applies a chemical to the algae that inhibits PS I but does not affect PS II (case 2). Which of the following results is expected? In case 1, only PS I completely loses function; in case 2, no proton gradient is produced. In case 1, only PS I completely loses function; in case 2, a proton gradient is still produced. In case 1, both PS I and PS II completely lose function; in case 2, no proton gradient is produced. In case 1, both PS I and PS II completely lose function; in case 2, a proton gradient is still produced.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter8: Photosynthesis

Section: Chapter Questions

Problem 3VCQ: Figure 8.18 Which of the following statements is true? In photosynthesis, oxygen, carbon dioxide,...

See similar textbooks

Similar questions

You performed an experiment on photosynthesis on Elodea, using bromothymol blue as an indicator forpH. Your two light conditions were red light and blue light. You found that in blue light, your solutionturned a nice cobalt blue, and in red light it turned green.a. What can you conclude about the efficiency of photosynthesis in Elodea regarding those twowavelengths?b. What would your conclusion be if your negative control (no Elodea in white light) turned greenalso?
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.
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)
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
Which of the following structures is not a component of a photosystem? a. ATP synthase b. antenna molecule c. reaction center d. primary electron acceptor
A. The C4 plant performs photosynthesis more efficiently than the C3 when the CO2 concentration is 600ppm or less. Provide one reason why the rate of photosynthesis doesn’t change for the C4 plant when the CO2 concentration increases above 400 ppm. B. Discuss what is happening in the C3 plant when the CO2 levels are below 50 ppm. Provide one reason why this does NOT happen to the C4 plant.
Which of the following is produced during the light reactions of photosynthesis? C6H12O6 CO2 O2 ADP
place the following lists into the most appropriate pairs and explain how they are correct I chose the reduction of ferredoxin for the first one i chose O2 generation for the second i chose electron transport chain for the third I got these three wrong so i would like to know where i went wrong Antennae pigment molecules thylakoid membrane photosystem 1 Answer options: 1. absorption of light 2. reduction of ferredoxin 3. electron transport chain
Which of the following proteins is NOT involved in cyclic electron flow during the light reaction? A. ferredoxin B. plastocyanin C. photosystem I D. photosystem II
Which of the following is true about how oxygen is formed during photosynthesis? Select one or more: a. oxygen is formed during the production of sugars b. carbon dioxide molecules are broken down to form oxygen c. oxygen is formed during electron transport d. water molecules are broken down to form oxygen
Which of the following shows the path of electron flow during photosynthesis? Question 5 options: photosystem II → cyt b6f → photosystem I cyt b6f → photosystem I → photosystem II photosystem I → photosystem II → cyt b6f cyt b6f → photosystem II → photosystem I photosystem I → cty b6f → photosystem II
The following equation (look photo) summarizes the reactants and products of A. Aeorbic respiration B. Photosynthesis