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DNA ~
DNA notes taken in Honors Bio
28
Biology
9th Grade
01/09/2012

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Term
What are the 3 common parts of a nucleotide?
Definition
Deoxyribose
Nitrogen base
Phosphate
Term
List the 4 types of nitrogen bases
Definition
Adenine
Guanine
Cytosine
Thymine
Term
Where do nucleotide molecules connect to each other?
Definition
phosphate
Term
What is the pairing arrangement of nitrogen bases?
Definition
Guanine pairs with Cytosine
Adenine pairs with Thymine
Term
The structure of DNA is in a ___________ arrangement.
Definition
double helix arrangement
Term
What does double helix mean?
Definition
arranged in a spiral-like formation, or a twisted ladder
Term
The sides of DNA are made up of alternating _____________ and ___________ molecules.
Definition
phosphate and deoxyribose
Term
The "steps" of DNA are made of ________________.
Definition
nitrogen bases
Term
What bonds hold together the nitrogen bases?
Definition
hydrogen bonds
Term
What does DNA stand for?
Definition
Deoxyribonucleic Acid
Term
DNA is comprised of the _____ half and the __________ half.
Definition
gene half and complementary half
Term
Describe transcription
Definition
the process where DNA unzips and mRNA is made from the gene strand. mRNA carries information in DNA out to the ribosome to make proteins
Term
What is Thymine replaced with in mRNA?
Definition
Uracil
Term
Describe translation
Definition
The process where the ribosome translates information found in mRNA to begin assembling protein. tRNA contains anti-codon that matches with a codon to bring amino acid into ribosome.
Term
define purine
Definition
bases that have 2 rings of carbon and nitrogen atoms, such as adenine and guanine
Term
define primidine
Definition
bases that have one ring of carbon and nitrogen atoms, such as cysotine and thymine
Term
What is a complementary base pair?
Definition
the pairing of nitrogen bases in DNA (Cysotine with guanine, adenine with thymine)
Term
2 strands of DNA are held together by _________ bonds.
Definition
hydrogen
Term
What is a frameshift?
Definition
a point mutation that inserts or deletes nucleotide bases
Term
define mutagen
Definition
chemical or physical things in the environment that can cause mutations
Term
define mutation
Definition
a change in genetic information that can be inherited
Term
define point mutation
Definition
a mutation that changes one or a few nucleotides
Term
What are the 2 types of mutations?
Definition
gene and chromosomal
Term
What are the 3 types of point mutations?
Definition
substitution, insertion, deletion
Term
Which 2 point mutations result in a frameshift mutation?
Definition
deletion and insertion
Term
What are the 4 chromosomal mutations?
Definition
deletion, inversion, translocation, duplication
Term
Which types of mutations can add genes to a chromosome?
Definition
duplication, translocation
Term
Which type of mutation takes genes away from a chromosome?
Definition
deletion
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