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biologysolreview3
Biology SOL Review part 3
Question | Answer |
---|---|
deoxyribose | the name of the five carbon sugar in DNA |
a nucleotide in DNA contains on of the four bases-- | adenine, guanine, thymine, or cytosine |
adenine binds with | thymine |
gunaine binds with | cytosine |
base pairing | binding of bases like A and T and G and C- also known as Chargoff's Rules |
DNA molecule unzips when... | the enzyme helicase breaks the hydrogen bonds between the nucleotides |
DNA polymerase | enzyme that moves along adding complementary nucleotides according to the base pairing rules |
RNA | directly manufactures proteins |
transcription | DNA to RNA |
translation | RNA to protein |
differences between DNA and RNA | 1. DNA = 2 strands; RNA= 1 strand 2. sugar molecule: DNA = deoxyribose; RNA= ribose 3. No T in RNA; T replaced with U |
mRNA | carries instructions for making protein |
tRNA | carries appropraite amino acid |
rRNA | involved in protein production |
template | one strand of DNA acts as this |
mRNA | is made and processed in the nucleus of the cell and then moves to the cytoplasm |
codons | mRNA carries the message of DNA in this form which are made up of three bases |
tRNA | these with the appropriate anticodons bring aminoacids to the ribosome |
polypeptide | created by amino acid linked by peptide bond |
mutation | a change in one or more nucleotide bases -caused by mistakes when copying DNA |
frame shift | insertion/ deletion cause this - everything from that point on is affected |
chromosomal mutation | change in number or structure of chromosomes |
nondisjunction | chromosomes don't seperate (ex. Down's Syndrome) |
translocation | segment moved to non-homologous chromosome |
duplication | segment repeated |
inversion | segment inserted into a reverse orientation |
deletion | segment of chromosomes lost |
amniocentesis | amniotic fluid taken to look at fetal cells |
karyotype | paired chromosomes arranged based on shape/ size |
PKU | body unable to metabolize phenylalanine |
sickle cell anemia | red blood cells abnormally shaped |
hemophilia | blood fails to clot- sex link trait |
genetic engineering | building recombinant DNA (DNA reconstructed from different organisms) |
restriction enzymes | DNA is cut using these |
sticky ends | unpaired ends of DNA |