BIO250 Spr11-23-1

BIO250 Spr11-23-1 - BIO250 BIO250 Introduction to...

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Unformatted text preview: BIO250 BIO250 Introduction to Biochemistry Introduction to Biochemistry March 18 March 18 Neutral versus Neutral versus amphiphilic lipids amphiphilic lipids Today’s agenda • Administrative issues • Question to ponder • Fatty acids • Using fatty acids to generate neutral lipids • Physical properties of neutral lipids • Using fatty acids to generate amphiphilic lipids Administrative Issues Announcements • Workshop 6 next week • To contact me, please use Blackboard, unless you need to reach me confidentially. • Blackboard postings ensure quicker responses Announcements • Office hours: Hutchison Hall 317 Wednesday 11:00 a.m. - 12:00 noon or by appointment • To make appointments for office hours: before/after class or e-mail • Exam #3 - Friday, April 15 • Covers lectures 22-32 (Platt/Welte) • A few tips how to study for my exams To prepare for the exam • Review lectures, workshops, Q2Ps • Textbook secondary, for refresher and context - reading guide for Chapters 10 and 11 now available • I like to use visuals from lectures/workshops on exams • I like to use old ponder questions • But: these materials are often “updated”, so don’t just apply a memorized answer without thinking • I will comment on questions posted or received until 2 p.m. on Thursday, April 14 • To give everybody an equal chance to read and digest the answers provided, I will not comment on questions posted/received after that deadline. • Questions about Q2Ps are most productive if you come with an answer attempt. • Therefore: Ask your questions early! To prepare for the exam Question to ponder Previous question to ponder D Animals typically store energy as triglycerides (neutral lipids) rather than as glycogen (a carbohydrate), as discussed on slide 54. But many animals DO store some of their energy as glycogen. Why is not all energy stored as neutral lipids? Answer Glycogen is water-soluble, and it is therefore much more accessible to enzymes. As a result, it is much quicker to break down glycogen than fat. Storage of lipids inside cells: specialized organelles = lipid droplets Lipid droplet N Answer Glycogen is water-soluble, and it is therefore much more accessible to enzymes. As a result, it is much quicker to break down glycogen than fat. So for a quick burst of energy, carbohydrates are a good reserve material. For longer term storage of large amounts of energy, fat is a better choice. Ponder question A partial answer to this question can also be found in the textbook, on page 347. For many, but not all, ponder questions you will be able to find an answer by scrutinizing the materials (lecture, readings, workshops) you already have. What if the ponder question you voted for was not answered in class?...
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This note was uploaded on 05/01/2011 for the course BIO 250 taught by Professor Culver during the Spring '08 term at Rochester.

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BIO250 Spr11-23-1 - BIO250 BIO250 Introduction to...

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