BILD 1 Lecture 8: Metabolism Cell Division and Cancer

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Biology/Lower Division

5417 Lecture notes (8) MetabolismCell Division and Cancer Tuesday, May 2, 2017 3:26 PM ATP synthase at the inner mitochondrial membrane makes ATP by which of the following methods? a. Allowing Na+ to move down its electrochemical gradient b. Allowing H+ to move against its electrochemical gradient c. Facilitated diffusion of H+ d. Active transport of H+ e. Active transport of Na+ Answer: C H+ moves from high concentration to low concentration Photosynthesis Autotrophs are the producers of the biosphere Autotrophs are living things that are able to make their own food without using organic molecules derived from any other living thing o Autotrophs that use the energy of light to produce organic molecules are called photoautotrophs o Most plants, algae, and other protists, and some prokaryotes are photoautotrophs 6002+61120 photosynthesis >Calti2 06 +602 Is this endergonic or exergonic? Happens within the chloroplasts. Still happens within membrane. Stroma: cytoplasm of chloroplast Thylakoids and Granum are the stacks The two stages of photosynthesis 1. The light reactions a. Convert light to chemical energy (NADPH ATP) 2. The Calvin cycle (aka the dark reactions) a. NADPH and ATP reduce carbon dioxide into sugars The light reactions: converting solar energy to chemical energy Visible radiation drives the light reactions Sunlight contains energy called electromagnetic energy or radiation o Visible light is only a small part of the electromagnetic spectrum, the full range of electromagnetic wavelengths o Electromagnetic energy travels in waves, and the wavelength is the distance between the crests of two adjacent waves Pigments, molecules that absorb light, are built into the thylakoid membrane o Plant pigments absorb some wavelengths of light and transmit others
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