29 Questions
What are the two main types of photosynthetic pigments?
Chlorophylls and carotenoids
Which component of the photosynthetic apparatus is responsible for capturing light energy?
Light harvesting complex
What is the main function of the Calvin-Benson Cycle?
Fix carbon dioxide
Which process involves the conversion of light energy into chemical energy in photosynthesis?
Photochemistry
In which mechanism of CO2 fixation do plants exhibit a biochemical pathway to minimize photorespiration?
C4 carbon cycle
What is the ultimate source of energy for life on Earth?
Light energy from the sun
What is the main source of energy for photosynthetic organisms?
Solar energy
What type of organisms can use the energy stored in complex carbon compounds synthesized through photosynthesis?
All forms of life
What is the relationship between speed of light, frequency, and wavelength?
$c = \lambda \nu$
What characterizes a wave in terms of its structure?
Wavelength
What is light described as in addition to being a wave?
Particle
Which type of wave is light considered to be?
Transverse electromagnetic wave
What dictates transitions to an excited state, according to the laws of quantum mechanics?
Energy gap between ground state energy and excited state energy
In pigment excitation, what happens when a quantum has the correct wavelength?
It is absorbed and raised to an orbital of a higher energy level
What does the absorption spectrum of chlorophyll indicate about its absorption behavior?
Strong absorption in blue and red, while green is reflected
What happens when a pigment molecule absorbs light with the wrong wavelength?
It will not be absorbed
How does an excited state molecule behave after absorbing light?
It emits energy (fluoresces) or drops back to its original ground state
What happens when an electron is transferred to a more stable orbital on a different atom?
It increases stability of the atom
What factor determines the energy (E) of a photon?
Frequency
In the context of light energy, how is energy related to frequency?
Directly proportional
What are molecules that absorb light called?
Pigments
Which region of the electromagnetic radiation spectrum are human eyes sensitive to?
Visible-light region
What is the unit of Planck's constant (h)?
$J \cdot s$
Which type of light has higher energy: long wavelengths or short wavelengths?
Short wavelengths
What is the role of the ε subunit in ATP synthase?
Prevents breakdown of ATP
Which CF0 subunit may form a pathway for proton translocation?
Subunit III
What drives the rotation of the γ subunit in ATP synthase?
Movement of H+ across the membrane
How many nucleotide-binding sites are there on the CF0–CF1 complex?
3
What does the δ subunit link in ATP synthase?
CF1 to CF0
Test your knowledge on the light reaction of photosynthesis in Plant Biochemistry and Metabolism with this quiz based on the lecture by Luigi E. Barroga. Explore topics like the structure and function of photosynthetic apparatus, events in photosynthesis, and mechanisms of electron transport chain.
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