Explain the experiment by Avery and co workers that indicated that DNA contains the genetic material of life
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Pneumoccoci can be rough or smooth,
The rough form - is non virulent
The smooth - form is virulent
They extracted the smooth form, during a purification if transforming factor.
Where smooth strained cells were extrated and combined with each individual part of thw cell ( RNA, DHA, LIPIDS, CARBOHYDRATES)
Only the dna reacted with the cells proving it is respinsibe for carrying heritable information
the two parental strands separate and each makes a copy of itself. After one round of replication, the two daughter molecules each comprises one old and one new strand. Note that after two rounds, two of the DNA molecules consist only of new material, while the other two contain one old and one new strand.
Image: What is the semiconservative model of DNA replication?
State three requirements of DNA Polymerase for DNA synthesis to occur1. single stranded DNA template 2. deoxy nucleotide triphospahes ( dATP, dCTP, dGTP, dTTP) 3.primerWhat is a phosphodiester bond?Nucleotides in the DNA are covalently linked between the 3'hydroxy and 5'phosphate group of the next nucleotide. (The 3' hydroxy acts as a nucleophile and attacks the gamma phosphate)Draw a diagram of a DNA molecule and show where a phosphodiester bond is.At a DNA replication fork are Okazaki fragments found in the leading strand or in the lagging strand?A number of enzymes and other molecules are required for DNA replication in a cell. List five of these enzymes and explain the function of each.helicase- strand separation DNA polymerase III- stand elongation DNA topoisomease - stops tangling DNA polymerase I -removes primers DNA ligase- seals standsBriefly explain why telomerase activity is required in some eukaryotic cellsTelomeres are needed to maintain the ends of chromosomes and sustain chromosome stability in eukaryotic cellsAre histone proteins found in prokaryotic or eukaryotic cells?eukaryotes wrap their DNA around proteins called histones to help package the DNA into smaller spaces, most prokaryotes do not have histone