BISC 220 Midterm 1

BISC 220 Midterm 1 - Definitions esterlinkage= [ex, methanol; producingwater;therec

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BISC 220 Midterm 1 – Practice Definitions ester linkage  = a bond that forms between a hydroxyl and a carboxyl group; dehydration  product of an acid and an alcohol [ex., when acetic acid reacts with methanol; the OH  from acetic acid reacts with the H from the OH of methanol, producing water; there could  also be phosphoric acid esters, as in DNA, in which there is phosphodiester linkage] peptide bond  = links the the carboxyl group of one amino acid with the amino group of  another. amino acid  = composed of an asymmetric carbon (called the alpha carbon) bonded to a  hydrogen, a carboxyl group, an amino group, and a variable side chain called the R  group. nucleotides  = monomers that consist of a pentose covalently bonded to a phosphate  group and a nitrogenous base (the nucleoside = a monomer without the phosphate group). purines  = five-membered ring  added to the six-membered pyrimidine; adenine and  guanine. pyrimidines  = six-membered ring; cytosine, thymine, and uracil. phosphodiester linkage  = joins the sugar of one nucleotide with the phosphate of the  next; the polymer has 2 distinct ends: a 5’ end with a phosphate attached to a 5’ carbon of  a sugar, and a 3’ end with a hydroxyl group on a 3’ carbon of a sugar. glyoxyome  = found in plant seeds, contain enzymes that convert fatty acids to sugars for  growing seedlings. thylakoids  = inside chloroplast, there is a membranous system of flattened sacs that have  photosynthetic enzymes embedded in them; they may be stacked together to form  structures called  grana . centriole  = in many animal cells, there is a pair of centrioles, each composed of 9 sets of  triplet microtubules arranged in a ring, and is associated with the centrosome.
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basal body  = structurally similar to a centriole, it anchors the tubules in the cell (the two  tubules that run down the center of cilium or flegellum).
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This note was uploaded on 02/14/2009 for the course BISC 220L taught by Professor Herrera,mcclure during the Spring '07 term at USC.

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BISC 220 Midterm 1 - Definitions esterlinkage= [ex, methanol; producingwater;therec

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