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Biology 2051Chapter 6 HW Assignment ~.docx

Biology 2051Chapter 6 HW Assignment ~.docx - Chapter 6...

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Chapter 6 Homework 1. Redox Reactions When a biological molecule is oxidized, the electrons are often captured by NAD. With that knowledge, identify if the substrate in each reaction is being oxidized or reduced. Reduced Oxidized Pyruvate + NADH = Lactate + NAD Isocitrate + NAD = alpha ketoglutarate + CO2 + NADH Diphosphoglycerate + NADH = Glyceraldehyde phosphate + NAD Malate + NAD = Oxaloacetate + NADH Ethanol + 2NAD = Acetic Acid + 2NADH 2. Effect of temperature and enzymes on free energy curve Based on the graph, indicate if the following statements are true or false. a. A is influenced by temperature False b. B is influenced by temperature True c. A is lowered by an enzyme True d. B is lowered by an enzyme False 3. Biochemical pathway and the production of molecules In a biochemical pathway, a molecule that contains a single carbon atom is combined with an other molecule that has a 5-carbon backbone. This results in the formation of a 6-carbon molecule that is so unstable it breaks immediately into two, 3-carbon molecules. These 3-carbon molecules are subsequently recombined to synthesize larger molecular components of the biochemical pathway. What can be said about this series of events? Check all that apply. a. The 6-carbon molecule is insignificant and unnecessary
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b. The 6 carbon molecule is an important intermediate molecule c. Catabolism has been utilized to generate molecular building blocks d. Anabolism has been utilized to generate molecular building blocks 4. Formula for aerobic cellular respiration Which of the following is the correct formula for aerobic cellular respiration? a. glucose + 6 CO 2 → 6 O 2 + 6 H 2 O + energy intermediates + heat b. glucose + 6 O 2 + heat → 6 CO 2 + 6 H2 O + energy intermediate c. glucose + 6 O 2 → 6 CO 2 + 6 H 2 O + energy intermediates + heat d. glucose + 6 O 2 + 6 H 2 O→ 6 CO 2 + energy intermediates + heat 5. First and Second Laws : Indicate the examples below that illustrate the first law of thermodynamics a. a plant uses sunlight to form a H + gradient b. A H + gradient is used to produce ATP c. 10% of the energy in one trophic level can be passed to the next trophic level d. An animal uses ATP to move its muscles 6. Laws of Thermodynamics and Living Things An autotroph captures energy from other sources and does not actually produce energy because a. The transfer of energy increases entropy b. Once energy is created it can be destroyed c. Kinetic energy is based on location d. Energy cannot be created or destroyed e. The transfer of energy increases the disorder of a system 7. Understand how proteins and fats are metabolized Fatty acids and some amino acids are converted directly into ______ for ATP production. a. FADH3 b. Glucose c. Pyruvate d. Acetyl CoA e. NADH 8. Kinetic vs. potential energyUnderstand how proteins and fats are metabolized You are cooking beans over a campfire. By the light of the fire, you read that one serving of beans is 120 calories. After eating the beans, you go for a hike along a stream. All of the items described here have energy. Identify the form of energy each contains.
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