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Seven deletion mutations are tested for their ability to form wild-type recombinants with five point mutations (a to e). The symbol + indicates that wild-type recombination occurs, and - indicates that wild types are not formed. Use the data to construct genetic map of the order of point mutations, and indicate the segment deleted by each deletion mutation.
he pyrimidine and purine bases are nitrogen containing compounds. What is the source of nitrogen for these two ring systems? In most examples,
How is it possible for a change in a single amino acid in a protein of 1000 amino acids to destroy its function, even when that amino acid is far away from any binding site?
How various ATP equivalents are required to synthesize de novo one molecule of IMP, starting from ribose-5-phosphate? Presume that all required precursors in the pathway are present.
Currently, three fossil skulls of Homo sapiens, dating to about 160,000 years BP, were discovered in eastern Africa. These skulls fill a gap between the 100,000 year old H. sapiens.
The least amount of carbon dioxide from burning of fossil fuels. Toms father suffers a stroke that leaves him partially paralyzed on his right side. What type of glial cell would you expect to find in increased numbers in the area of the brain that i..
Within a population of plants there are two alleles that code for flower color, red and white. Red is the dominant allele. If there are 300 red flowers and forty-five white flowers,
Cells are capable of replicating their own DNA, which amounts to billions of base pairs, quite efficiently, and yet in a PCR or sequencing reaction we are only able to accurately replicate.
Injections of TC cells completely removed all Hepatitis B viruses from infected mice, but the injections killed only 5 percent of the infected liver cells.
What is the benefit of a mouse liver cDNA library over a genomic library made from mouse liver. What is a lipid? Explain the different classes of lipids. What is a fatty acid? What makes acid saturated or unsaturated.
Determine volume of the sodium citrate in order to make up 7.5% solution. A solution needs 250 ml of a 7.5% (w/v) solution of the tri sodium citrate.
Amino acid compositions can be determined by heating a protein in 6 M HCL and running the hydrolysate through an ion-exhange column. If you were going to do an amino acid sequencing experiment, why would you want to get an amino acid composition f..
What are the roles of plasmodesmata and aquaporins. In the presence of the galactose derivative 6-O-benzyl-D-galactose, the curve is shifted to the right. What variety of agent is 6-O-benzyl-D-galactose.
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