DNA structure and replication, Genetic transcription
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Griffith experiment (2)
-chemical substance of one cell is capable of genetically transforming another cell
-transformation factor found that something could turn harmless bacteira pathogenic
Avery experiment: How DNA is transforming substance (2)
DNase destroyed the transforming substance.
-transforming substance is DNA
Charge off rule
the # thiamine mols. = # adenine and # cytosine mols. = # guanine
each new double helix contains one original strand and one new strand
UV light effect on DNA (2)
UV light destroys the DNA
-kills cells by damaging the DNA
when one base replaces another
when a base is left out
What type of mutation is sickle cell?
base pair substitution
which affects the amino acid combinationg the most Substitution mutation or deletion mutation?
deletion mutation, It will cause it to throw off the whole function leading to cells quick death
What helps out DNA repairs?
DNA polymerase removes wrong base and inserts correct one.
tRNA, Transfer RNA
carry specific amino acids for synthesis of protein
-key shaped structured
DNA unwinds in certain spots and mRNA is formed. mRNA leaves the nucleus to go to the ribosomes
mRNA acts as a template. tRNA brings amino acids to ribosomes where they are added to polypeptide chain
-protein chain is formed from amino acids using mRNA code, occurs in cytoplasm
extraneous nuclear material that does not encode for proteins.
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