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A mutation in DNA generates a UGA stop codon in the middle of the RNA coding for a particular protein. A second mutation in the cell leads to a single nucleotide change in a tRNA that allows the correct translation of the protein, that is, the second mutation "suppresses" the defect caused by the first. What nucleotide change has probably occurred in the mutant tRNA molecule? What consequences would the presence of such a mutant tRNA have for the translation of the normal genes in this cell?
If A/A x B/B is crossed with a/a and the F1 is testcrossed, what is the genotype and percenage of every progeny if the two genes are unlinked;
How may map units separate e and pe? To calculate the map units separating the genes, count the number of recombinant offspring and express this figure as a percentage of the total progeny.
The condition "xeroderma pigmentosum" is characterized by high rates of skin cancers like malignant melanoma. It is caused by mutations in any of many genes that encode enzymes that participate in:
While studying the Michaelis - Menton kinetics of enzymes in the TCA cycle, the synthetic hydrocarbon malonate was shown to act as a competitive inhibitor of one of the enzymes.
Two NotI restriction enzymes cleave DNA on opposite sides of the Dbm gene in a species of yeast. A molecular probe for Dbm detects a DNA restriction fragment of 8.5 kb in organisms that are wild type at Dbm.
What techniques would you utilize to detect this DNA sequence. Mechanical stress or trauma frequently triggers the symptoms of gouty arthritis in susceptible people. In this view elucidate why gouty arthritis affects the great toe more commonly than ..
Some migratory birds are heterothermic, meaning they sometimes maintain constant body temperature and other times permit their body temperature to vary.
Suppose that you perform the following monohybrid cross in dogs: Aa X Aa, in which the dominant A allele produces black coat color and the recessive a allele produces a white coat color.
In a prokaryotic cell, where would you expect to find enzymes that break down cellulose?
What are the effects of sympathetic nervous system on the glomerular filtration rate (GFR)?
List out each animal phylum, give 3 examples of animals from each, and give the distinguishing characteristics for each.
A couple, George and Lara, have three sons. The oldest and youngest are normal but the middle child has xeroderma pigmentosum.
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