Life Science 2 lecture 3

Life Science 2 lecture 3 - Life Science 2 (lecture 3) I....

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Life Science 2 (lecture 3) I. Nucleic Acids II. What do cells look like and why? III. Ten Landmarks in eukaryotic cells -------------------------------------------------------------------- I. Nucleic Acids Information 2 types: DNA and RNA Sugar phosphate backbone; bases (A, T, C, G, U); information is the sequence of bases! Some useful things we can do with DNA sequence data o Evolutionary relatedness (how similar between two different species) o Individual I.D. (eg. paternity test) o Production of proteins ------------------------------------------------------------------- II. What are cells? What do they look like and why? Very different looks Eg. sperm (almost no cytoplasm, lots of mitochondria), egg (a lot of cytoplasm), RBC (no nucleus), neurons (branching), plant cells (chloroplasts, cell wall) Open Systems Transform energy that they require ? TAKE HOME MESSAGE #1: Cells are the smallest unit of life and can be self-sustaining. Q: Do cells (and organs) violate the 2nd law of thermodynamics?
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Life Science 2 lecture 3 - Life Science 2 (lecture 3) I....

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