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A deck of flashcards for Undergraduate Study of Biology.

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Question
Answer
Translation   show
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show Messenger RNA (mRNA) and transfer RNA (tRNA). mRNA is translated into a protein with the help of tRNA.  
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show An adaptor molecule composed of RNA, that serves as the physical link between the mRNA and the amino acid sequence of proteins. They are not identical, each carrying a specific AA and has an anticodon on the other end.  
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show A sequence of three nucleotides forming a unit of genetic code in a transfer RNA molecule, corresponding to a complementary codon in messenger RNA.  
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Conditions for accurate translation   show
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Wobble   show
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Ribosomal RNA (rRNA)   show
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show The P site, A site and E site.  
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The P site   show
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The A site   show
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The E site   show
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show Initiation, Elongation and Termination.  
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show A stage of translation that brings together mRNA, a tRNA with the first amino acid, and the two ribosomal subunits (rRNA). A small ribosomal subunit binds with mRNA and a special initiator tRNA.  
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show AUG  
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Elongation stage in translation   show
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Termination stage in translation   show
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Polyribosome (polysome)   show
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Two populations of ribosomes in the cell   show
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Are ribosomes identical?   show
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Free ribosomes   show
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show Makes proteins of the endomembrane system and proteins that are secreted from the cell.  
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show Polypeptide synthesis always begins in the cytosol.  
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show Only when the polypeptide signals the ribosome to attach to the ER.  
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Signal peptide   show
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show Changes in the genetic material of a cell or virus.  
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Point mutation   show
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Two general categories of point mutations   show
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show Replaces one nucleotide and its partner with another pair of nucleotides.  
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Silent mutations   show
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Missense mutations   show
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Nonsense mutations   show
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show Where insertion or deletion (addition or losses) of nucleotide pairs in a gene alters the reading frame of the RNA.  
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Mutagen   show
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show Bacteria; simultaneously. Eukarya: Separated by nuclear envelope. Archaea: Likely coupled.  
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Defining a "Gene"   show
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show A region of DNA that can be expressed to produce a final functional product, either a polypeptide or an RNA molecule.  
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show The process by which DNA directs protein synthesis, which includes two stages: transcription and translation.  
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show Evidence from the study of metabolic defects and nutritional mutants in Neurospora.  
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show The intermediate between genes and the proteins for which they code.  
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Transcription   show
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show The initial RNA transcript from any gene.  
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show On a triplet code: a series of non-overlapping, three nucleotide words. These triplets are the smallest units of uniform length that can code for all the amino acids.  
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Template strand   show
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show mRNA base triplets, read in the 5' to 3' direction during translation. It must be read in the correct reading frame(groupings) in order for the specified polypeptide to be produced.  
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show The enzyme which catalyzes RNA synthesis by prying the DNA strands apart and hooks together the RNA nucleotide. RNA synthesis follows the same base-pairing rules as DNA, except uracil substituted for thymine.  
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show The DNA sequence where RNA polymerase attaches  
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Transcription unit   show
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show Initiation, Elongation and Termination.  
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show Promoters signal the initiation of RNA synthesis.  
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How the initiation stage of transcription happens in bacteria?   show
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How the initiation stage of transcription happens in Eukaryotes?   show
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Transcription initiation complex   show
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show A promoter which is crucial in forming the initiation complex in eukaryotes.  
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show RNA polymerase moves along the DNA, untwisting the double helix, 10 - 20 bases at a time.  
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show Transcription progresses at a rate of 40 nucleotides per second in eukaryotes.  
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Termination stage in transcription for bacteria   show
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Termination stage in transcription for eukaryotes   show
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show These non-coding regions, they are also called intervening sequences.  
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Exons   show
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RNA splicing   show
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show Consists of a variety of proteins and several small nuclear ribonucleoproteins (snRNP). It interacts with certain sites along an intron, releasing the intron and joining together the two exons that flanked the intron.  
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Ribozymes   show
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show It can form a three-dimensional structure because its ability to base pair with itself. Some bases in RNA contain functional groups. RNA may hydrogen-bond with other nucleic acid molecules.  
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show Variations from genes that can encode more than one kind of polypeptide, depending on which segments are treated as exons during RNA splicing.  
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Domains   show
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show The evolution of new proteins.  
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