what does the structure of a ribosome look like?
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like this: \nhttp://upload.wikimedia.org/wikipedia/en/0/07/Ribosome_subunits.png
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NDA? DNA? Because X-ray crystalography showed it to be that shape. Read Nature vol 171 pg 964
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well let me think...ITS A DOUBLE HELIX!!!!!!!!!!!!\nDOUBLE          DOUBLE               DOUBLE
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the first one is RNA. You can tell by the U at the end of the sequence
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RNA is short hand for Ribonucleic Acid. RNA has a similar structural appearance to DNA (Deoxyribonucleic Acid). You can read about the chemical structure at the site referenced below.\n\nRNA crops up in several different cell locales from the nucleus to the ribosomes and appears to serve in a variety of cell roles. The basic function most often noted is that of a messenger or transfer template upon which proteins are built. The information for this construction comes from the DNA which unzips long enough for these RNA templates to be formed.\n\nThe less noted ribosomal RNA may well be more important in that the ribosomes are protein factories.  And protein manufacturing is kind of where it is at.  It just that text book writers have to draw the line somewhere on how much information about how many cell types is going to be discussed.  If we are talking the brain cells for instance there is some evidence to suggest RNA might well play a part in memory formation.  \n\nThis is seriously cooked down discussion of a key chemical player in cellular dance of life. If you take up where your book left off I suggest a visit to your local library. The subject area you want is biochemistry or molecular biology.  For the latest info your next step would be to hit the stacks in your local university library to review the science journals.  Citation index is big help here.
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Ok, the ones of the left side are first base in codons, the ones on the very top are second base in codons, and the ones on the very right are third base codons. So you read it in 1,2,3 order. Lets say your reading a codon like... AAT, so you would look at the A on the left look under THE A column at he top, then drag your finger from the first T on the right, and the amino acid would be leucine. I'm taking Bology too except CP. Hope I helped!!!
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Is its structure a ring with double bonds?
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There are four structures; primary, secondary and Tertiary structures. \n\nThe primary structure is the sequence of amino acids in a polypeptide chain, held together by peptide bonds (which occur between the amine group of one amino acid and the carboxyl group of another). \n\nThe secondary structure is the folding of the polypeptide chain into alpha helices and Beta pleated sheets, these are held together due to hydrogen bonding within the polypeptide itself. \n\nTeritary structure is the further folding of a polypeptide chain into a complex globular molecule (also held together by hydrogen bonds).\n\nFinally, Qauternary structure is the folding of two polypeptide chains together, the two chains are held together not only by hydrogen bonds but also by ionic bonds and disulphide bridges(these bonds form between the suplhur atoms on the R groups of the amino acids).
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I could copy the answer, but I have some good links instead. \nSkeletal muscle fibers are multinucleated and fusiform, and basically contain myofibrills. See details at the link:\nhttp://training.seer.cancer.gov/module_anatomy/unit4_2_muscle_structure.html\n\nPay special attention to the myofibrils, the mitochondria and the sarcoplasmic reticulum :-)\n\nIllustrations of structure at different levels (I wish these pictures had been around years ago when I studied this!):\nhttp://www.agen.ufl.edu/~chyn/age2062/lect/lect_19/179.gif\nhttp://www.mhhe.com/biosci/esp/2001_gbio/folder_structure/an/m5/s5/assets/images/anm5s5_1.jpg
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No. The central dogma, means just that. DNA to RNA to protein. Amino acids must be assembled on the ribosomal workbench by the interaction of, mRNA and tRNA, which followed from DNA's instructions.
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Presumably you know that the primary structure of a protein is simply a chain of amino acids.  The secondary and tertiary structures form as the result of various intermolecular forces pulling different amino acids in that chain together.  Hydrogen bonding is one of the intermolecular forces that act on the amino acids in the chain and cause them to fold up. Think of it this way: if you started with a long strip of paper (representing the primary structure of the protein), and then stapled it together in a bunch of places to make a complicated three-dimentional structure, the hydrogen bonds would be like the staples (or some of them), holding the linear chain of amino acids in a three-dimentional shape.
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Picture a string of beads- the beads are different sizes and shapes. \n\nNow, "proteins" are basically like a string of beads that could be a very long string or a short string. AND instead of beads, there are amino acids- with different shapes and sizes. \n\nBut these strings don't lie flat. Depending upon the amino acids and other factors, the protein strings bend and fold in certain ways. So the string may become more like a ball or other strange shapes; this affects the way the protein works and interacts with other protein or chemicals. \n\nHope that mental picture helps answer your question...
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1 ribosomes\n2 stimuli\n3 enzyme\n4 cytoplasm
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Through a process called translation in which the information contained in nucleic acids (DNA & RNA) are converted into a protein sequence. This process is done on piece of cellular machinery called the ribosome.
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> *How are the codes for proteins carried from the nucleus to the ribosomes?\nmRNA, messenger RNA, is transcribed from the "template" strand of DNA for that particular gene.  The mRNA may leave the nucleus and enter the cytoplasm, where it will encounter a ribosome.\n\n> A single strand of DNA has the bases AGTAAC. Using letters, show a matching DNA strand from this pattern.\nTCATTG\n\n> *How is tRNA used when cells build proteins?\ntRNA is a sequence of three nucelotides bound to the corresponding amino acid.  The ribosomes "read" the mRNA, match it, in reading frame, with the corresponding tRNA, and add the amino acid to the growing polypeptide.\n\n> *You begin as one cell. Compare the DNA in one of your brain cells to the DNA in one of your heart cells\nGenerally speaking, the nuclear DNA in your heart cell will be the same as the nuclear DNA in your brain cell.
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carboxly and amine groups.\n\nCheck out, http://en.wikipedia.org/wiki/Amino_acid for more info about amino acids and what the structure looks like.
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The ribosome, which is made up of a large and small subunit.