Hershey and Chase used a DNA-based virus for their work. What would the results have been if they had used an RNA virus?
A) With an RNA virus radioactive protein would have been in the final pellet.
B) With an RNA virus radioactive RNA would have been in the final pellet.
C) With an RNA virus neither sample would have had a radioactive pellet.
D) With an RNA virus the protein shell would have been radioactive in both samples.
B
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If you could speed up the process of continental drift in order to witness its effects over the next 1 million years, what factors do you think would be affected? Check all that apply.
_____ Ocean circulation patterns _____ Global climate patterns _____ The number of extant (living) species _____ The distribution of extant species _____ The intensity of solar radiation at different latitudes
The classical form of the metabolic disease phenylketonuria is caused by a mutation in the gene encoding the enzyme phenylalanine hydroxylase (PAH), which converts phenylalanine to tyrosine. A variant form of phenylketonuria is caused by a mutation in a separate gene that encodes a different enzyme involved in the synthesis of a cofactor needed for PAH to function. Which of the following phenomena is illustrated by these two forms of phenylketonuria?
A) Allelic heterogeneity B) Compound heterozygosity C) Locus heterogeneity D) Anonymous polymorphism
In 1990, a small herd of white-tailed deer migrated into a new environment. Research indicated that the herd has reproduced exponentially with a doubling time of 5 years. It was estimated that this herd would reach its carrying capacity by 2005. In what year would the herd be "half way" to its carrying capacity? Explain
What will be an ideal response?
Approximately ____ Y-linked genes have been discovered
a. 10 b. 20 c. 60 d. 80 e. 120