Upgrade to remove ads
Combo with 6.1 Section Review Questions. and 2 others
Terms in this set (29)
Explain why both autotrophs and heterotrophs depend on photosynthesis to obtain the energy they need for life processes.
the food that fuels the heterotroph originates with an autotroph.
Describe the role of chlorophyll in the biochemical pathways of photosynthesis.
chlorophyll helps to capture the light energy for the plants
List the three substances that are produced when water molecules are broken down during light reactions.
hydrogen atoms, electrons, and oxygen.
Explain why the splitting of water is important to the continuation of the light reactions.
For every two molecules of water that are split, four electrons become available to replace those lost by the chlorophyll molecules in photosystem ii.
Name the product of the process known as chemiomosis.
Thinking about the main role of pigments in photosynthesis, explain how the pigments in colored objects such as clothes differ from plant pigments.
The plant pigments absorb many different wavelengths in order to utilize the light reaction. However, the pigments in objects such as clothes reflect certain wavelengths in order to display a certain color.
The molecule that precedes the electron transport chains of bother photosystem i and photosystem ii is an electron acceptor. What is the original molecules that is the electron donor for both of these systems?
Explain how the light reactions would be affected if there were no concentration gradient of protons across the thylakoid membrane.
If there were no concentration gradient across the thylakoid membrane, then ATP synthase would have no 'fuel' to convert ADP into ATP, greatly reducing the efficiency of the light cycle's usable energy production.
Explain Relationship, electron transport chain and primary electron acceptor.
The electron transport chain begins with the primary electron acceptor
Explain Relationship, photosystem and pigment.
A photosystem is made up of a pigment and its associated proteins.
Explain Relationship, thylakoid and stroma.
Stroma is the substance which surrounds thylakoids within the chloroplast.
Explain Relationship, carbon fixation and C4 pathway.
The C4 pathway is an alternative form of carbon fixation used primarily by plants which need to conserve water in hot or dry climates.
Distinguish between autotrophs and heterotrophs.
Autotrophs create usable energy from inorganic sources such as sunlight in order to survive. Heterotrophs must consume organic materials through food in order to survive.
Identify the primary source of energy for humans.
Ultimately, the main source of energy from humans is the sun. Autotrophs use photosynthesis to produce organic materials which we eat in order to survive.
Relate the types of pigments involved in photosynthesis and their roles.
Chlorophyll a is the only pigment which interacts with the rest of the light reaction proteins by transferring excited electrons to the primary electron acceptor. Chlorophyll b and carotenoids aid chlorophyll a in harnessing the light energy from the sun.
Compare the different roles of photosystem I and photosystem II in photosynthesis.
Photosystem I absorbs light energy in order to excite electrons which will ultimately power the production of NADPH from NADP+. Photosystem II absorbs light in the same method as photosystem I, but the result of its electron is to replace that which was lost in photosystem I.
Describe what happens to the extra energy in excited electrons as they pass along an electron transport chain in a chloroplast.
The energy which is lost throughout the electron transport chain is used to move hydrogen ions (H+) from the stroma into the thylakoid
Explain how oxygen is generated in photosynthesis.
Carbon dioxide is reduced to sugar. Water is converted to oxygen
Summarize the events of chemiosmosis
During chemiosmosis, hydrogen ions (H+) flow from high concentration in the thylakoid to low concentration in the stroma through ATP synthase. ATP synthase utilizes this concentration gradient to convert ADP + phosphate into ATP.
Explain what happens to the 3-carbon compounds that do not leave the Calvin cycle to be made into organic compounds.
The G3P which is not used to make organic compounds is turned into RuBP to be recycled in the Calvin cycle.
Relate the rate of photosynthesis to carbon dioxide levels.
Plants need carbon dioxide in order to photosynthesize. therefore, an increase in the amount of carbon dioxide will cause an increase in the rate of the plant's photosynthesis. However, plants will stop photosynthesizing when they make enough energy.
Name the part of the chloroplast where the Calvin cycle takes place.
Describe what can happen to the three-carbon molecules made in the Calvin cycle.
One molecule of G3P is used to make organic compounds, while the rest of the G3P is converted back into RuBP.
Distinguish between C3, C4, and CAM plants.
C3 plants initially form three-carbon compounds. C4 plants convert carbon dioxide into 4 carbon compounds. CAM plants fix carbon in such a way to adapt to hot, dry climates.
Explain why the light reactions and the Calvin cycle are dependent on each other.
The products of the light reactions are used in the Calvin cycle, and some of the products of the Calvin cycle are used in the light reactions.
Explain why increased light intensity might not result in an increased rate of photosynthesis.
At some point, all of the available electrons are excited, and the maximum rate of photosynthesis is reached.
What would happen to photosynthesis if all of the three-carbon sugars produced in the Calvin cycle were used to make organic compounds?
The Calvin cycle would not be able to run again, and photosynthesis would not be as productive
Explain how a global temperature increase could affect plants.
Plants would have to resort to being CAM plants
Explain how the world would be different if C4 plants and CAM plants had not evolved.
Plants would not be able to adapt to different environments.
THIS SET IS OFTEN IN FOLDERS WITH...
Biology Chapter 7 and 8
YOU MIGHT ALSO LIKE...
Photosynthesis Chapter Review
Chapter 6 Review
AP Biology Chapter 1-section 8 Reading G…
Photosynthesis Problem Set
OTHER SETS BY THIS CREATOR
SE TEST 2
Exam 1 PS all lectures
Leaf Cross Section
OTHER QUIZLET SETS
Bio text #2
Photosynthesis and Cellular Respiration
Practice Exam 2
Bio practice exam 2