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Draw two bacteria conjugating. Label the F+ strain, the F- strain, the direction of movement for DNA, and the location of the ampicillin resistant gene and the streptonmycin resistant gene.
Consider a pre-mRNA that is 12,700 nucleotides long and contains seven 100 base exons separated by 2000 base introns. It seems like an overwhelming task for the splicing machinery to find the exons buried in the intron sequences and to splice them..
When DNA samples A and B were separated by buoyant density centrifugation the 2 samples migrated 23 and 15 cm, respectively. If DNA B had a GC content of 34%, what was the GC content of DNA A.
Ebola is a far more contagious virus than HIV. However, there has never been a large scale ebola outbreak whereas over 40 million people in the world are currently living with AIDS. What are the characteristics of the ebola virus that hinder its a..
How is the circulatory system of reptiles characterized? What is the basic difference between the reptile and the amphibian heart?
An RNA molecule has the following percentages of bases: A = 23%, U = 42%, C = 21%, and G = 14%.
Discuss the three theories about the evolution of multicellularity, giving supportive examples of each. Include in your discussion the strengths and weaknesses of each theory.
What is a transcription factor? Give an example of a transcription factor and a possible role it may play in the aging process.
Flagella occur in both prokaryotes and eukaryotes. WHich of the following statements DOES NOT describe how the flagella of prokaryotes and eukaryotes differ?
For an individual having a genotype formed of two different alleles that condition different varieties of the same phenotypical trait, upon what will the phenotypical feature actually manifested depend?
There is a population of 100 frogs. Twenty are heterozygotes, 30 are homozygous recessive, 25 are homozygous dominate. What is the frequency of the dominate allele?
As fate would have it, Alonso is taking a medication that specifically blocks muscarinic acetylcholine receptors. Bernd is taking a medication that specifically blocks nicotinic acetylcholine receptors.
why it is important to conserve population level diversity.
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