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As an adult your DNA replicates billions of times and undergoes cell division. In the face of extreme challenge, DNA polmerase does a remarkably good job of inserting proper nucleotide at each spot in response to template. Though, mistakes occasionally occur.
a. what is one way in which a mutation can occur duing dna replication.b. what is one way in which a mutation can be initiated in DNA that is not replicating.c. explain how in a. (from above) the type of mutation would be repaired.d. is every unrepaired mutation harmful? Why or why not?
Only 1 out of 3 mutations that occur in a gene result in a change to the protein structure. What is the probability that a random mutation will change the structure of a protein?
When digested DNA is analysed using agarose gel electrophoresis the total size of fragments sometimes does not add up to the size of the original DNA molecule. How can this be explained and how can this be seen in ethidium bromide stained agarose ..
Normal cells greatly slow their rates of cell division after filling a culture dish with a layer that is one cell deep. If a circular group of cells is removed from the middle of the filled culture dish,
Estimate the sequence of hexapeptide on the basis of the following data. When the sequence is not known, a comma separates the amino acids.
Compare and contrast the processes of replication and transcription. Be sure o include in the discussion a comparison of the purpose of the processes, the templates used in each process, when each process occurs, and the initiation and termination..
The fruit in summer squash may have different shapes. When two true breeding plants with disc-shaped fruit were crossed to true breeding plants with long fruit, all the F1 plants had disc fruits. In the F2 progeny there were 110 plants with disc-s..
Describe the etiology, pathophysiology, and manifestations of pneumonia, tuberculosis, pulmonary hypertension, and cor pulmonale.
Why are bacteria, rather than say human cells, used as experimental organisms in molecular biology studies?
Which is not true of amino acids? a) There are 20 of them essential in the body b) They are the building blocks of proteins c) tRNA brings them to the ribosome for protein synthesis d) all of the above are true.
The allele l in Drosophila is recessive, sex-linked, and lethal when homozygous or hemizygous (the condition in males). If a female of genotype L/l is crossed with a normal male, what is the probability that the first two surviving progeny will be..
What genotypic frequencies are expected at birth in the next generation. How much change has there been in the frequency of the B allele.
Henri tested the effects of a blood pressure reducing drug and found that blood pressure dropped significantly in those treated but did not change in an untreated control group. What is a reasonable conclusion from this experiment?
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