Photosynthesis Process Quiz

Chlorophyll a and b absorb blue and red wavelengths, but reflect green light.

Accessory pigments absorb wavelengths that chlorophyll a cannot, extending the range of light wavelengths that the cell can harness for photosynthesis.

Leaves are the main organs of photosynthesis.

<p>Broad, flat leaf surfaces expose abundant surface area to sunlight, which is essential for photosynthesis.</p> Signup and view all the answers

<p>Water is essential for photosynthesis, and it is absorbed by the plant's roots.</p> Signup and view all the answers

<p>Carbon dioxide and oxygen are important gases for photosynthesis, and they enter and exit the plant through the stomata, which are tiny openings in the epidermis of the leaf or stem.</p> Signup and view all the answers

<p>Stomata allow for gas exchange, but they also allow for water evaporation (transpiration) from the plant.</p> Signup and view all the answers

<p>Most photosynthesis occurs in the mesophyll, which is the collective term for the internal cells filling the leaf's interior. These mesophyll cells contain abundant chloroplasts, the organelles responsible for photosynthesis.</p> Signup and view all the answers

<p>Sunlight</p> Signup and view all the answers

<p>Discrete packets of kinetic energy</p> Signup and view all the answers

<p>The shorter the wavelength, the more energy it contains</p> Signup and view all the answers

<p>Ultraviolet radiation, visible light, and infrared radiation</p> Signup and view all the answers

<p>Visible light</p> Signup and view all the answers

<p>Chlorophyll a</p> Signup and view all the answers

<p>Energy-capturing pigment molecules other than chlorophyll a</p> Signup and view all the answers

<p>Because they absorb only some wavelengths of visible light</p> Signup and view all the answers

<p>$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$</p> Signup and view all the answers

<p>Photosynthesis is an oxidation-reduction (redox) process.</p> Signup and view all the answers

<p>The glucose is used for energy, as a raw material to build cellulose cell walls, and for manufacturing other compounds.</p> Signup and view all the answers

<p>Plants may store excess glucose as starch or sucrose in specialized storage organs like tubers.</p> Signup and view all the answers

<p>Autotrophs</p> Signup and view all the answers

<p>Heterotrophs obtain their carbon by consuming pre-existing organic molecules.</p> Signup and view all the answers

<p>Photosynthesis produces oxygen as a byproduct.</p> Signup and view all the answers

<p>Light energy, primarily from the sun</p> Signup and view all the answers

<p>The photosystems, located in the thylakoid membrane, contain pigments like chlorophyll a that capture light energy for photosynthesis.</p> Signup and view all the answers

<p>The reaction center is the chlorophyll a molecule that uses the captured light energy in the photosynthetic reactions.</p> Signup and view all the answers

<p>Antenna pigments are the pigments in a photosystem other than the reaction center chlorophyll a. They capture light energy and funnel it to the reaction center.</p> Signup and view all the answers

<p>The two stages of photosynthesis are the light reactions and the carbon or light-independent reactions.</p> Signup and view all the answers

<p>During the light reactions, solar energy is converted to chemical energy in the form of ATP and NADPH, using electrons from chlorophyll.</p> Signup and view all the answers

<p>Water molecules are split during the light reactions, providing electrons to replace those lost from chlorophyll and yielding oxygen as a by-product.</p> Signup and view all the answers

<p>The products of the light reactions are ATP and NADPH.</p> Signup and view all the answers

<p>ATP and NADPH are used as resources in the carbon reactions or light-independent reactions.</p> Signup and view all the answers

<p>The light reactions occur in the thylakoid membranes of the chloroplast.</p> Signup and view all the answers

<p>A photosystem typically contains around 300 chlorophyll molecules.</p> Signup and view all the answers