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Chapter 12
Chapter 12 Review
19
Biology
10th Grade
01/29/2009

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Term
How is RNA different than DNA?
Definition
  1. The sugar is ribose
  2. Generally single stranded
  3. Contains uracil in place of thymine
Term
What is RNA used for?
Definition
The coding of proteins
Term
What are the three types of RNA?
Definition
mRNA, rRNA, tRNA
Term
What does mRNA do?
Definition
Carries copied instructions from DNA to the rest of the cell for protein synthesis
Term
What does tRNA do?
Definition
Transfers amino acids to ribosomes for protein assembly
Term
What does rRNA do?
Definition
It is part of the ribosome
Term
What are introns?
Definition
DNA sequences not involved in coding for proteins
Term
What are exons?
Definition
DNA sequences involved in coding for proteins
Term
What happens during copying to introns and exons?
Definition
Both are copied, but introns are cut out of RNA
Term
What are the two theories for the use of introns?
Definition
Involved in evolution, and to Make different proteins from one DNA strand
Term
What is a polymer?
Definition
Polypeptide chain
Term
What is the genetic code?
Definition
The language of mRNA instructions
Term
What are the four bases of RNA?
Definition
Adenine[A], Uracil[U], Cytosine[C], Guanine[G]
Term
How many different codon combinations are there?
Definition
64
Term
What is translation?
Definition
The decoding of mRNA into a polypeptide chain
Term
Describe the process of Translation
Definition
Transcription occurs, mRNa attaches to ribosomes, codons are read one at a time, Peptide bonds are made between amino acids, Stop codon is read and polypeptide chain is released
Term
Who's experiment was similar to Griffth's?
Definition
Oswald Avery
Term
What did Avery find?
Definition
Nucleic acid transmits genetic into from one generation to the next
Term
What does bacteriophage mean?
Definition
Bacteria eater
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