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Lecture 3

BIOLOGY LECTURE 3.docx

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Department
Biology
Course
Biology 1001A
Professor
Tom Haffie
Semester
Fall

Description
BIOLOGY LECTURE 3 What will be coveredReview membraneslipidsCellular diversitySynthiaDivision of OrganellesCell Replication Desaturases are enzymes that introduce double bonds into fatty acidsIf bacterium moves from warmer to cooler water what happens to desaturase enzyme activity As temperature drops the bacterium membrane will tend to become less fluid and more rigid So bacterium needs more unsaturated lipids and fatty acids which are fluid in room temperature So as temperature drops desaturase enzyme activity needs to increase in order to produce fatty acids and lipids with double bonds which makes the membrane more fluid Transmission Electron MicrographLooks at cross sectional areaCut very thin section of the cell and stained and shot electrons through it Scanning Electron MicrographPuts electron dense stain on the outside of the object gives 3D image Bactria and Archea are Prokaryotes They dont have any membrane bound organelles and also their membran
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