test 1 2007 bio50

test 1 2007 bio50 - Amino Acids Normally Forms Disulfide...

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Amino Acids Normally Forms Disulfide bond o Cysteine Cause conformational changes Two amino acids that are often phosphorylated o Tyrosine o Threonine o serine They have hydroxyl groups Amino Acid begins each polypeptide chain o Methionine o AUG Give the name of the amino acid that ends each polymer o Stop codon which is not an amino acid The large and small subunits of the ribosome come together and create three important, functional regions involved in translating the mRNA. List these three regions, and define the important process that occurs in each. o A – acceptor site for tRNA accepts tRNA anticodon with amino acid attached – change tRNA, codon/anticodon o P – peptidyl bonding site o E – exit site – release of tRNA to enable new strand to attach What is the function of the following o TBP – tata box binding protein Enables RNA polymerase to attach to transcribe the template strand o Calvin Cycle Occurs in the Chloroplast
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gives the plant cells the ability to produce disaccharides it needs for energy o snRNPs splicing, combination of small nuclear RNA and proteins responsible for splicing process involved the removal of introns using selected adenosine and lariat structures occurs in the nucleus an RNA molecule cannot enter the ribosomes for transcription until the RNA is ribosomes for transcription until the RNA is spliced, capped and polyadenylated o Amyloplast Non pigmented organelles in place used for the storage of starch Would be located in the stroma o TFIIH Transcription factor found in mRNA txn Assists in opening DNA (helicase) Phosphorylates RNA polymerase Molecules that can freely diffuse across a lipid bilayer o Ethanol o Oxygen Lipid Raft o Lipid rafts are sections of the membrane dense with proteins seeking to help eacother on a specific transport task. They seek to transport similar molecules. Lipid rafts are often larger
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than the membranes, in thickness and Hydrocarbon tails stick out. Inner mitochondrial membrane o Folded into numerous cristae which greatly increases its total surface area o Contains proteins with three types of functions Carry out the oxidation reactions of the ETC ATP synthase make atp for the matrix Transport proteins that enable passage of metabolites into and out of matrix Impermeable to ions because ATPase is driven by concentration of H+ Cardiolipin o Outer membrane Large channel forming protein(PORIN) permabl to all molecules 5000 daltons of less Proteins that form mitochondrial lipids o Matrix Large internal space containing highly concentrated mixture of enzymes including those responsible for
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This note was uploaded on 04/09/2008 for the course BIOL 0500 taught by Professor Wessel during the Spring '08 term at Brown.

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test 1 2007 bio50 - Amino Acids Normally Forms Disulfide...

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