Bi 101 Lecture Exam Two Study Objectives:
Chapters 5, 6, 7
All concepts and vocabulary are fair game in Chapters 5-7
Chapter Five: …………..
Evaluate the importance of membranes to the homeostasis of the cell, emphasizing their various functions Explain how the properties of the lipid bilayer govern many properties of the cell membrane (ie understand the chemical lipid bilayer structure—what does “hydrophobic” and “hydrophilic” mean?) Discuss the general types, functions, and importance of membrane proteins. Describe the components of a solution.
Contrast the processes of passive and active transport, including diffusion, osmosis, facilitated diffusion, active transport and bulk transport. How might temperature play a role in these processes? Which molecules will move across the membrane freely? Which may need to utilize facilitated diffusion? Be able to solve problems involving osmosis and diffusion: for example, predict whether cells will swell or shrink under various osmotic conditions (iso- vs. hyper- vs. hypotonic solutions). Draw on your lab experiments for practical application! Use key terminology to describe transport processes (i.e. the tonicity of the solution) Describe the sodium-potassium pump—what type of transport is this useful for? Compare endocytotic and exocytotic transport mechanisms in bulk transport. Metabolism
Describe metabolism— (what are other words we have used for these processes? Define energy and use examples to contrast potential energy and kinetic energy. State the first and second laws of thermodynamics, and discuss the implications of these laws as they relate to organisms Distinguish between exergonic and endergonic reactions, and give examples of how they may be coupled Discuss the central role of ATP in the overall energy metabolism of the cell. How does ATP perform work? Explain how an enzyme lowers the required energy of activation for a reaction (what is activation energy?). What is an...
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