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science 13 and 14

DNA,RNA,MRNA,TRNA,RRNA

QuestionAnswer
Nucleotides-What are they. What are the three parts. Nucleotides are acidic molecules built from small monomers, or subunits 1. Deoxyribose 2. A phosphate group 3. Nitrogenous base
DNA location In the Nucleus
Bases held together by _______________bonds Hydrogen Bonds
DNA parts-Rungs? Handrails? Rungs: A,T,C,G Handrails: Deoxyribose Sugars and Phosphates
DNA Shape? Double Helix thats twisted
Why is DNA replication Semi-Conservative Is when the DNA "unzips" and forms a new DNA. One strand with the original and the other being the copy
Role of RNA? RNA helps put the genetic code into action
What is a gene? A distinct sequence of nucleotides forming part of a chromosome
RNA processing-Introns and Exons Introns: The portions that are cut out and discarded Exons: The remaining pieces
4 differences between DNA and RNA DNA: 2 strands, A,T,C,G, Stays in nucleus, Deoxyribose sugar RNA: 1 strand, A,U,C,G, leaves nucleus, Ribose sugar
3 types of RNA & their function MRNA: Carry copies of instructions from the nucleus to ribosomes in the cytoplasm RRNA: small organelles composed of two subunits TRNA: Carries amino acids to the ribosome and matches them to the coded mRNA message
Transcription-what is it and where does it occur? Is the process of copying a base sequence from DNA to RNA Occurs in the nucleus
Translation-what is it and where does it occur? The decoding of an MRNA message into a protein Occurs in the cytoplasm at the ribosome
Which organelle in the cytoplasm does translation take place? Ribosomes
If DNA is ATC, what is the complimentary mRNA_______, What is tRNA_______ MRNA: UAG TRNA:UAG
What is a codon? Consists of three consecutive bases that specify a single amino acid to be added to the polypeptide chain
What does a codon code for? Genetic code
What is mRNA the instructions for making? For assembling amino acids into proteins
Created by: basketballl
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