Bio 100 BYU Independent Study Midterm 1 Questions & Answers

Bio 100 BYU Independent Study Midterm 1 Questions & Answers The reactions of photosynthesis can be divided into two stages: - Answer-Light-dependent and lightindependent The full range of energy in the universe is called - Answer-The electromagnetic spectrum Which one of the following is not a photosynthetic pigment? - Answer-Photosystem I How do C4 plants differ from C3 plants? - Answer-C4 plants store carbon in the PEP molecule. C4 plants have a special anatomical structure. C4 plants can survive in hotter and drier climates. Place the following events in their proper temporal sequence: - Answer-1) Antenna chlorophyll molecules become excited by photons of light 2) Electrons of antenna molecules move to a reaction center in the chlorophyll molecules 3) Reaction center electrons jump to protein acceptor molecules in the thylakoid membranes 4) Protein acceptor molecules pass electrons down to protein molecules in the thylakoid membrane along the electron transport pathway 5) Energy of the passing electrons is used to manufacture high-energy molecules, such as ATP and NADPH. 6) ATP and NADPH are used in the light-independent reactions of photosynthesis to manufacture sugars. What is the process outlined in the previous question called? - Answer-The light-dependent reactions of photosynthesis Photosystem II Photosystem I The internal space of the chloroplast is called the - Answer-Stroma Place the following events in their proper temporal sequence: - Answer-1) Electrons from protein acceptor molecules are passed to a sequence of thylakoid membrane proteins. 2) Hydrogen ions (H+) are pumped into the thylakoid. 3) A concentration gradient of hydrogen ions across the thylakoid membrane exists. 4) By diffusion H+ seeks to move from an area of high concentration (inside the thylakoid) to an area of low concentration (outside the thylakoid). 5) H+ is restricted from passing through the thylakoid membrane except at certain sites that are flanked by the membrane protein ATP synthase 6) H+ pass through membrane protein called ATP synthase. 7) As H+ passes through the membrane protein it provides energy for the production of ATP 8) ADP (lower energy) is converted to ATP (higher energy) In plants, ATP is - Answer-1) A high-energy molecule produced by the action of Photosystems I and II 2) Produced by the action of the enzyme ATP synthase. 3) Used directly by the plant or can be stored for later use. 4) Produced by the light-dependent reactions of photosynthesis The energy emissions that function in photosynthesis are - Answer-Visible light... CONTINUES....