Thursday, November 12, 2009
Thurs-Day 2
Bio 3/6- we viewed and discussed the various types of genetic"point" mutations, a single nucleotide change/mutation/alteration in the sequence of DNA nucleotides that make up a DNA molecule/chromosome.
The three types of point mutations are named logically:
substitution- one nucleotide replaces/substitutes for another in the sequence
addition- one extra/additional nucleotide is added somewhere in the nucleotide sequence
deletion- one nucleotide is removed/deleted from somewhere in the nucleotide sequence.
These changes/mutations cause a difference the sequence of amino acids that are coded for by the DNA/gene thus forming a protein with a different shape and function (usually the mutant protein is non-functional); there is a possibility of a "silent mutation" in which a DNA triplet is changed but still codes for the same (redundant) amino acid.
AP Chem- we discussed the major models of the atom that evolved as knowledge and technology developed and provided more accurate and precise empirical evidence.
We then discussed Planck's explanation of "blackbody radiation" and showed the implications of his conclusion that energy itself exists in little packets called quanta (photons). We did calculations with Planck's equation showing the energy per photon of a given color of light/type of EMR based on either frequency or wavelength.
The three types of point mutations are named logically:
substitution- one nucleotide replaces/substitutes for another in the sequence
addition- one extra/additional nucleotide is added somewhere in the nucleotide sequence
deletion- one nucleotide is removed/deleted from somewhere in the nucleotide sequence.
These changes/mutations cause a difference the sequence of amino acids that are coded for by the DNA/gene thus forming a protein with a different shape and function (usually the mutant protein is non-functional); there is a possibility of a "silent mutation" in which a DNA triplet is changed but still codes for the same (redundant) amino acid.
AP Chem- we discussed the major models of the atom that evolved as knowledge and technology developed and provided more accurate and precise empirical evidence.
We then discussed Planck's explanation of "blackbody radiation" and showed the implications of his conclusion that energy itself exists in little packets called quanta (photons). We did calculations with Planck's equation showing the energy per photon of a given color of light/type of EMR based on either frequency or wavelength.
# posted by C @ 11:42 PM 
