Chapter 12: DNA And Rna

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