A point mutation changes a codon from UCG to UAG. What will happen to the resulting polypeptide?
What will be an ideal response?
UAG is a stop codon, so the polypeptide will terminate prematurely.
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What is NOT a reason why an abscessed wound might not respond to antibiotic treatment?
A. The bacteria within the abscess have ceased replicating, and many antibiotics require actively replicating cells in order to be effective. B. The blood vessels that would bring the drug to the area have been destroyed or clogged with clots, preventing the drug from getting to the microbes in the abscess. C. The bacteria in an abscess have all acquired multi-drug antibiotic resistance, so any drugs that are used will have no effect. D. The chemical composition of the pus in the abscess often inactivates antibiotic drugs, making them ineffective.
Answer the following statements true (T) or false (F)
1. Mutated p53 genes are found in more than half of all human cancer tumor cells. 2. Through examining the function and form of FtsZ and tubulin proteins, biologists can find evolutionary links between prokaryotes and eukaryotes. 3. An advantage of asexual reproduction is that it takes less time and energy than sexual reproduction. 4. After the crossover event in meiosis I, the recombinant sister chromatid is genetically identical to its parents. 5. The nuclei resulting from a mitotic division are genetically different from the original.
Where does the bond form that binds one strand of DNA to its other strand?
A) Between the sugar and the base B) Between the phosphate group and the sugar C) Between the bases D) Between the phosphate groups
There is an energy investment step needed to get glycolysis started, requiring the use of ________ ATPs
A) three B) one C) zero D) two E) four