Ch 7 Flashcards
As a consequence of the work of the biologist Theodor Engelman, others showed that chloroplasts absorb light mainly in the _____ and ______ part of the spectrum.
Blue-violet…red-orange
The products of the light reactions of photosynthesis are
ATP and NADPH
The Calvin Cycle makes direct use of ____ to make _____
CO2, ATP, and NADPH…sugar
Which pigment participates directly in the light reactions by abosrobing mainly blue-violet and red light?
Chlorophyll a
What name is given to membranous sacs found within a chloroplast?
Thylakoids
What is the function of stomata?
Gas exchange
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 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
The overall function of the Calvin cycle is
Making sugar
____ is the source of the oxygen gas released by a photosytem
H20
Where does the energy for the Calvin cycle come from?
NADPH and ATP
The ultimate energy source that supports mos life on Earth is______
Sunlight
What is the equation for photosynthesis?
6 CO2 + 6 H20 —-> CH1206 + 6 O2
Global climate change could be magnified by _______
Deforestation
What compound is found at the reaction center of a photosystem?
Chlorophyll a
The Calvin cycle requires _____ and ______ from the light reactions in order to operate.
ATP and NADPH
Which of the following is a good reason for using fast-growing trees as fuel?
Vigorously growing plants remove a lot of carbon dioxide from the air
In photosynthesis, redox reactions ultimately transfer electrons from ____ to _____
H20…CO2
The end products of photosynthesis are ___ and ____
Glucose…molecular oxygen
C4 plants conserve water by _____
Keeping stomata closed most of the day
How many times must the Calvin cycle turn for the plant cell to be able to produce one molecule of glucose?
Six
What is found in both cellular respiration and in the light reactions of photosynthesis?
Electron transport chain
What is an example of an autotroph?
Pine tree
