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Bio 181L Course Overview: Labs and Policies

Welcome to the Bio 181L course! This lab is focused on thinking, understanding, investigating, and evaluating biological concepts, moving beyond memorization. Attendance is crucial, with quizzes and lab assignments playing a significant role in your grade. This course emphasizes observation and reasoning, utilizing hands-on experiments with a strong foundation in chemical principles. Please familiarize yourself with the syllabus and course policies, including strict no-late-work guidelines. Contact the instructor for any absences or personnel inquiries.

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Bio 181L Course Overview: Labs and Policies

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  1. Welcome to 181L • MCB 181L Course Website: http://blc.arizona.edu/courses/181lab • Instructor: Chris Jarchow • Email: christoj@email.arizona.edu • Section: 73 • Office Hour: Tues. 11:00 - noon in Koffler 422 (by appointment only; notify me by Tues. @ 10:50 am) • Email Reading Times: Monday and Wednesday 5-6 pm

  2. 181L is … • Thinking, Understanding, Investigating, Evaluating • Not, memorize, regurg., leave, forget, repeat • Manual pp. ix & xi should help • Not sync’ed with most lecture sections, but internally coherent & mutually reinforcing

  3. 181 Lab ACCOUNTS • Attendance vs. UAccess.arizona.edu

  4. About You • http://blc.arizona.edu/courses/181lab (Safari home page) • Click ‘Create Accounts’ • Your section number is: ## • **Bio181L_Go** is the way to do your work. Browser bad • Sci. Library, BLC supported • While waiting, fill out a card (name on front; on back, primary concern about this course?).

  5. My Webpage • Get there via homepage* => Instructors => Sxn# *http://blc.arizona.edu/courses/181Lab (Lab Man yellow page)

  6. Web page operation

  7. Web page operation

  8. Web page operation

  9. Web page operation

  10. Web page operation

  11. A few points to discuss • In-class quizzes (every week) • Material from manual • Concepts practiced/demonstrated in class • Primarily covers previous week’s lab • some questions will come from manual on current week’s lab • Course also linked to D2L • ALL written assignments, unless instructed otherwise, will be submitted to the D2L Dropbox (10:00 PM night before lab)

  12. Policies & grading • Syllabus (Linked on course homepage) • Honor code & Plagiarism (Manual, p. xiii) • Assignments • On-line assessments/tutorials (10%) • In-class quizzes (15%) • Lab assignments (LABAs--Lab Activity Based Assignments) (50%) • Lab Projects & reports (combine to 25%) • Every assignment is posted & reported on basis of 100% • For electronic assignments, log in again to see your recorded score • Also reported to you at the end

  13. ATTENTION • No Late Work Accepted! • Absences: must contact Asya Roberts (Bio. East 109) as soon as possible, including planned/unplanned absences • Must be documented as a legitimate excuse (2 absences = dropped) • No dedicated make-up lab available for this course • Late (≥ 10 mins) = absent. leaving early = absent. • Quizzes (in-class) administered at the start of class; MUST be on time to take quiz and receive credit (as well as credit for that day’s assignments)! • Behavior in lab • NO ELECTRONICS, PERIOD. • Beware the admin. drop

  14. How? Why? the Tao of Molecules • How molecules feel & the world they live in

  15. Primary goals • Create understanding by observation, reasoning • Chemical foundations for the course: • Water & its properties • non-watery things • Know molecules as real & tangible things

  16. Atoms • DNA, RNA: C, H, N, O, P, [Mg++] • Carbs: C, H, O • Protein: C, H, N, O, (S), (P), [traces] • Membranes: C, H, N, O, P, (S) *there’s the occasional role for Ca++, etc.

  17. Who am I? • At birth, # protons = # electrons • Atoms seek completion, which means outermost electron set = 8 (hydrogen, helium it’s just 2)

  18. Symbolizing Atoms & Molecules

  19. Color – know these

  20. Views of water H2O

  21. Views of water O H2O H H

  22. Views of water O H2O H H

  23. + + - Views of water O H2O H H See lab manual, p. 0-3

  24. How to draw molecules Carbon HydrogenOxygenNitrogen Figure is from Lab Manual p. 0-5

  25. Interacting with H2O • To your StructViewers! • Desktop => Bio181L_Go

  26. Tao of Molecules

  27. Hypotheses • What are they?

  28. Hypotheses • Causal explanation of an observed phenomenon

  29. Lab materials • Pipetman operation • Pipet ‘pump’ operation

  30. Tao of Molecules • Group names • Initials of all members (no spaces) • Desktop =>Tao of Molecules

  31. “Salting out” • It’s a real term; used to refer to a situation where the addition of salt (portable charges) alters the solubility of other molecules in water • Why should this be?

  32. Evaporation • First things first--what is it? What’s going on in terms of molecules • Experiment: Ethanol and water on your arm: which is cooler & why? • Prediction: based on molecular weight, which should evaporate more quickly--H2O (2 x 1 + 1 x 16) or CH3CH2OH (5 x 1; 2 x 12; 1 x 16)

  33. Evaporation • If not, why not? • Salt--ever tasted your sweat? Or anybody else’s for that matter? • What benefit might there be to adding NaCl to water that you are intending to evaporate?

  34. Clean up! • Oil waste in the hood • ethanol waste in the sink • anything too messy wadded up and discarded

  35. What’s Assessor? =>Chatting<=

  36. Vocabulary homework • EITHER both versions of the crossword exercise • ORVocabuWary with a better than threshold score • For “Atoms & Molecules”, that’s 60,000 • Errors count off. Slowness counts off.

  37. Homeworkdue 10 p.m. before lab • Assessor: 181 Intro ’12 • Assessor: Molecular World Tutorial • Vocab Atoms/Mols: xWord(x2) or ‘Wary • Next week’s quiz will include: • - Concepts from today • - Atom colors • - Deducing partial charges (from tutorial) • - Manual: Lab 2

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