________ is the source of the oxygen gas released by a photosystem. |
H2O |
The color that we see when looking at a pigmented object is ________. |
the wavelengths that are reflected or transmitted by the pigmented object |
The shorter the wavelength of visible light, the ________. |
greater the energy |
Within the inner membrane of a chloroplast, interconnected sacs of membrane called ________ are suspended in a thick fluid called the ________. |
thylakoids... stroma |
When a molecule absorbs a photon, one of its electrons is raised to the ________ state. |
excited |
The Calvin cycle requires ________ and ________ from the light reactions in order to operate. |
ATP... NADPH |
Which of the following is produced during the light reactions of photosynthesis? |
O2 |
Photosynthesis contributes to plant growth by ________. |
taking in carbon dioxide and making sugars (carbohydrates) |
The energy of wavelengths that appear ________ is LEAST useful to photosynthesis. |
green |
If a plant appears blue to us, what wavelength of light is being reflected? |
blue |
All of these descriptors of the Calvin cycle are true except |
the location is the chlorophyll |
The reason why we do not see autumn colors until autumn is |
in autumn the amount of chlorophyll decreases permitting autumn colors to show |
Through which creatures does God supply energy for nearly all life forms? |
plants |
The Calvin cycle makes direct use of ________ to make ________. |
CO2, ATP, and NADPH... sugar |
What name is given to a discrete packet of light? |
photon |
What name is given to the membranous sacs found within a chloroplast? |
thylakoids |
What is responsible for the yellow-orange coloration of leaves in the fall? |
carotenoids |
Through what structure(s) do plants obtain most of their water |
roots |
The light reactions of photosynthesis take place ________. |
in the thylakoid membrane |
What is the function of stomata? |
gas exchange |
Refer to the accompanying figure. Which of the following is TRUE regarding the behavior of a chlorophyll molecule as it absorbs a photon? |
The energy of a photon raises an electron to the excited state. |
In photosynthesis, an H+ ion gradient forms across the ________. |
thylakoid membrane |
The products of the light reactions of photosynthesis are ________. |
ATP and NADPH |
The organelle that houses the photosynthetic mechanisms is |
chloroplasts |
What is the ultimate source of energy in the bread you had for lunch? |
sunlight |
The following roles of these structures in the light reactions are true except |
the electron transport system makes carbon dioxide |
All of the following are probable reasons why God created photosynthesis except |
He is limited in His creativity |
If you provided your shade-tolerant plants with their preferred wavelength of light, but only minimal amounts of water, which of the following would you expect to occur? |
decreased amounts of ATP being produced by the plants |
Which of the following equations best summarizes photosynthesis? |
6 CO2 + 6 H2O → C6H12O6 + 6 O2 |
What are grana? |
stacks of membranous sacs |
What is one reason why plants have accessory pigment molecules, like chlorophyll b and carotenoids? |
to absorb energy in parts of the electromagnetic spectrum that chlorophyll a cannot |
Which of the following is the source of electrons for the light reactions? |
H2O |
Where are photosystems located? |
thylakoid membrane |
Within the inner membrane of a chloroplast, interconnected sacs of membrane called ________ are suspended in a thick fluid called the ________. |
thylakoids... stroma |
The two chemical reactants of photosynthesis are |
carbon dioxide and water |
The organelle that houses the photosynthetic mechanisms is |
chloroplasts |