10: Photosynthesis Flashcards
Module 2, Lesson 4
Almost all life on Earth ultimately depends on…
Energy from the Sun
A process that produces oxygen is termed…
Oxygenic
List three groups of organisms that can perform photosynthesis.
- Cyanobacteria
- 7 types of algae
- Most plants
During photosynthesis…
Carbon dioxide, water, and sunlight are converted into glucose, water, and molecular oxygen.
The process of photosynthesis is very similar to ____, but in reverse.
Aerobic respiration
The oxidation of water and reduction of carbon dioxide is driven by…
The energy from the Sun
The metabolic processes in chloroplasts and mitochondria form a(n)…
Energy cycle
Photosynthesis uses the products of ____ as starting substrates.
Respiration
Aerobic respiration uses the products of ____ as starting substrates.
Photosynthesis
In plants, photosynthesis occurs in the…
Chloroplasts
In leaves, cells called ____ contain a large number of chloroplasts.
Mesophylls
Chloroplasts have a ____ membrane.
Triple
The inner membrane of a chloroplasts interact with…
The stroma
(an interior compartment)
The stroma contains…
Thylakoid discs
Thylakoid discs are stacked in columns called…
Grana
The thylakoid disks are separated from the stroma by the…
Thylakoid membrane
The area enclosed by the thylakoid membrane is called the…
Thylakoid space or lumen
The thylakoid space contains ____ and ____.
Photosynthetic pigments and protein complexes
List the two main stages of photosynthesis.
- Light-dependent reactions
- Light-independent reactions
Light-dependent reactions occur in the…
Thylakoids
Processes that occur during the light-dependent phase include…
(four)
- Capturing of solar energy
- Generation of ATP
- Reduction of NADP+ to NADPH
- Production of oxygen from water
Light-independent reactions take place in the…
Stroma
Processes that occur during the light-independent phase include…
(three)
- Carbon fixation
- Calvin cycle
- Production of organic molecules
____ are molecules that absorb visible light photons.
Pigments
A ____ is a packet of light that acts like a discrete bundle of energy.
Photon
A photon’s ____ is inversely proportional to its ____.
Energy ; wavelength
The ____ describes the process by which photons can remove electrons from molecules.
Photoelectric effect
What happens in a molecule if an incoming photon has precisely the right energy?
- The photon is absorbed
- Its energy is transfered to an electron
- The electron moves to a higher energy level
____ electrons are those that have received energy from a photon.
Excited
During photosynthesis, the pigments in a chloroplast act as…
Photoelectric devices
Each pigment has a characteristic…
Absorption spectra
(can only absorb a specific wavelength of light)
List the three main pigments found in chloroplasts.
- Chlorophyll A
- Chlorophyll B
- Carotenoids
The main pigment in plants is…
Chlorophyll A
Which wavelengths (colors) of light can chlorophyll A absorb?
Violet-blue and red
True or false:
Chlorophyll A is the only pigment that can directly convert light into chemical energy.
True
Chlorophyll B and carotenoids are considered…
Accessory pigments
Which wavelengths (colors) of light can chlorophyll B absorb?
Blue and red-orange