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DNA/RNA
Chapter 12 Review
24
Biology
9th Grade
02/28/2013

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Term
transformation
Definition
process in which one strain of bacteria is hanged by a gene or genes from another strain of bacteria
Term
bacteriophage
Definition
virus that infects bacteria
Term
bonus points
Definition
the answer to this card is bonus points and if you email me with the code 235 I will give you extra credit for studying
Term
nucleotides
Definition
monomer of nucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base
Term
base pairing
Definition
principle that bonds in DNA can form only between adenine and thymine and between guanine and cytosine
Term
chromatin
Definition
DNA tightly coiled around proteins called histones
Term
histone
Definition
protein molecule around which DNA is tightly coiled in chromatin
Term
replication
Definition
the process of duplicating DNA before cell division
Term
DNA polymerase
Definition
the principle enzyme involved in DNA replication
Term
messenger RNA
Definition
the RNA molecules that carry copies of the instructions for assembling proteins
Term
ribosomal RNA
Definition
RNA that makes up ribosomes
Term
transfer RNA
Definition
the RNA molecules that transfer each amino acid to the ribosome
Term
transcription
Definition
the process of RNA molecules copying part of the DNA nucleotide sequence
Term
introns
Definition
DNA codons not involved in coding for proteins
Term
exons
Definition
DNA codons involved in coding for proteins
Term
codon
Definition
three consecutive nucleotides that specify a single amino acid
Term
translation
Definition
the process wherein the cell uses information from the mRNA to produce proteins
Term
anitcodon
Definition
bases that are complementary to one mRNA codon
Term
point mutation
Definition
gene mutations involving changes in one or a few nucleotides
Term
frameshift mutations
Definition
mutations that shift the reading frame of the genetic message
Term
mutations
Definition
changes in the genetic material
Term
polyploidy
Definition
organism with extra sets of chromosomes
Term
operon
Definition
a group of genes that operate together
Term
hox genes
Definition
genes that control the differentiation of cells and tissue in an embryo
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