02:50Cellular Respiration - Link Reaction and Krebs - Post 16 Biology (A Level, Pre-U, IB, AP Bio)Mr Exham Biology1250views2rank
01:55Cellular Respiration Part 3: The Electron Transport Chain and Oxidative PhosphorylationProfessor Dave Explains1119views2rank
Multiple ChoiceThe electron transport chain pumps H+ ions into which location of the mitochondria?3218views31rank
Multiple ChoiceWhich of the following is the source of the energy that produces the chemiosmotic gradient in mitochondria? 1162views
Multiple ChoiceThe energy given up by electrons as they move through the electron transport chain is used in which of the following processes? 1168views
Multiple ChoiceEnergy for synthesizing ATP is obtained by ATP synthase directly from which of the following processes? 960views1rank
Textbook QuestionWhat does the chemiosmotic hypothesis claim? a. ATP is generated using phosphates taken from intermediates in the electron transport chain. b. ATP is generated using a phosphate gradient produced by glycolysis and the citric acid cycle. c. ATP is generated using a proton-motive force that is produced by the electron transport chain. d. Water is generated using electrons taken from NADH and FADH2 and transported through the electron transport chain.1185views
Textbook QuestionMAKE CONNECTIONS The proton pump shown in Figures 7.17 and 7.18 is a type of ATP synthase (see Figure 9.14). Compare the processes shown in the two figures, and say whether they are involved in active or passive transport (see Concepts 7.3 and 7.4).637views
Textbook QuestionVISUAL SKILLS This computer model shows the four parts of ATP synthase, each part consisting of a number of polypeptide subunits (the structure in gray is still an area of active research). Using Figure 9.14 as a guide, label the rotor, stator, internal rod, and catalytic knob of this molecular motor.1006views
Textbook QuestionContinue your comparison of electron transport and chemiosmosis in mitochondria and chloroplasts. In each case, a. where do the electrons come from? b. how do the electrons get their high potential energy? c. what picks up the electrons at the end of the chain? d. how is the energy released as electrons are transferred down the electron transport chain used?981views
Textbook QuestionATP synthase enzymes are found in the prokaryotic plasma membrane and in the inner membrane of a mitochondrion. What does this suggest about the evolutionary relationship of this eukaryotic organelle to prokaryotes?1487views
Textbook QuestionFor a short time in the 1930s, some physicians prescribed low doses of a compound called dinitrophenol (DNP) to help patients lose weight. This unsafe method was abandoned after some patients died. DNP uncouples the chemiosmotic machinery by making the inner mitochondrial membrane leaky to H+. Explain how this drug could cause profuse sweating, weight loss, and possibly death.1431views