Chapter 12: DNA And Rna

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1.  Process in which DNA makes a copy of itself
2.  Eukaryotic chromoromes contain both DNA and protein tightly packed together to form a substance called ____________.
3.  During the process of _____________, RNA molocules are produced by copying part of the nucleotide sequence of DNA into a complementary sequence in RNA.
4.  The principle of ____________ states that hydrogenbonds can form only between certain bases in DNA.
5.  When the lac repressor protein binds to the ___________________, the lac operon is turned off.
6.  Process in which one strain of bacteria changes into another one
7.  The enzyme that uses one strand of DNA as a template to assemble nucleotides into a strand of RNA is called ________________.
8.  The decoding of an mRNA message into a protein is known as __________.
9.  Process in which cells become specialized in structure and function
10.  Region of DNA that indicates to an enzyme where to bind to make RNA
11.  Three bases on the tRNA molocule are that complementary to one of the mRNA codons are called a(n) _____________.
12.  After introns have been cut out of RNA molocules, the remaining peices called _________ are spliced together.
13.  Three nucleotides that specify a single amino acid to be added to a polypeptide
14.  A(n) ______________, is made up of three parts: a deoxyribose sugar, a phosphate group, and a nitrogeneous base.
15.  A change in the genetic material
16.  A series of genes, called the __________________, controls the development of organs and tissues in various parts of an embryo.
17.  The principal enzyme involved in DNA replication
18.  Sections of RNA molocules that are not involved in coding for proteins
19.  A group of genes that operate together
20.  Virus that infects bacteria
21.  Condition in which an organism has extra sets of chromosomes
22.  Protein that DNA wraps around in eukaryotic chromosomes
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