Chapter 7 and 28 Flashcards
Photosynthesis contributes to plant growth by…
taking in carbon dioxide and making carbohydrates
what equation best summarizes photosynthesis
6 CO2 + 6 H2O»_space;> C6H12O6 + 6O2
in photosynthesis, CO2 is …. and H2O is …
reduced; oxidized
The color that we see when looking at a pigmented object is…
the wavelengths that are reflected or transmitted by the pigmented object
The energy of wavelengths that appear…. is least useful to photosynthesis.
green
What is one reason why plants have accessory pigment molecules, like chlorophyll b and carotenoids
to reflect more energy
What is responsible for the yellow-orange coloration of leaves in the fall?
carotenoids
Within the inner membrane of a chloroplast, interconnected sacs of membrane called… are suspended in a thick fluid called the…
thylakoids…stroma
The Calvin cycle requires… and… from the light reactions to operate.
ATP… NADPH
What is the function of stomata?
gas exchange
Through what structure(s) do plants obtain most of their water?
roots
Where are photosystems located?
thylakoid membrane
If you provided plants with their preferred wavelength of light, but only minimal amounts of water, what would you expect to occur?
decreased amounts of ATP being produced by the plants
Which of the following is the source of electrons for the light reactions?
H2O
Which of the following is found in both cellular respiration and in the light reactions of photosynthesis?
electron transport chain
In photosynthesis, an H+ ion gradient forms across the…
thylakoid membrane
The herbicide, atrazine, targets the water splitting photosystem by acting as an electron acceptor and preventing electrons from entering the electron transport chain. Which of the following steps of photosynthesis would NOT be affected by atrazine?
H2O splitting
Describe the relationship between photosynthesis and cellular respiration.
The inputs of cellular respiration are the outputs of photosynthesis and vice versa. Photosynthesis inputs: CO2 + H2O outputs: O2 + C6H12O6 Cellular Respiration: inputs: O2 + C6H12O6 outputs: H2O + CO2
What will happen if you put a plant in the CO2 indicator solution?
The plant will take in a lot of CO2, so the indicator will have a higher pH because the addition of carbon causes solutions to be more acidic. There will be fewer carbon molecules as the plant goes through photosynthesis, so the solution will become more basic.
What happens if you put algae beads in the carbon dioxide indicator? Why?
The solution will change into a darker color, which indicates a more basic solution. This happens is because algae perform photosynthesis and take in CO2. Since photosynthesis has an input of CO2 and an output of O2, the algae will take in CO2. When there are fewer CO2 molecules, the pH of the solution will get higher because carbon makes solutions more acidic.
How will the pH of the CO2 indicator solution change if the algae beads perform more cellular respiration than photosynthesis? How ill the CO2 indicator solution color change?
The pH of the CO2 indicator solution will get lower as the algae beads perform cellular respiration because the process of cellular respiration releases CO2, which causes solutions to become more acidic. The CO2 indicator solution’s color will become lighter because the indicator solution shows acidic solutions in lighter colors, and the solution will become more acidic with the algae beads performing cellular respiration.
Do algae perform cellular respiration as well as photosynthesis?
Algae must perform cellular respiration because they must find a way to access stored in glucose. They are eukaryotes, and all eukaryotic cells have mitochondria that have a crucial role in the process as the sites of cellular respiration.
Does the water-splitting photosystem depend on any other step? How?
Yes, it ness light so that it has electrons to pass on to the electrons transport chain.
Does the NADPH-producing photosystem depend on any other step? How?
Yes, it depends on the electron transport chain in order to transfer electrons to NADP+.
