The evolution of which of the following biochemical processes changed the physical and chemical nature of Earth in such a way that most life-forms had to adapt radically or become extinct?
A) DNA replication B) photosynthesis
C) aerobic respiration D) anaerobic respiration
Answer: B
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Li-Fraumeni syndrome is a rare inherited disease that greatly increases a person's risk of developing several types of cancer. This disease stems from a mutation in the TP53 tumor suppressor gene (Nichols et al. 2001
Cancer Epidemiol Biomarkers Prev 10:83-87). In most cases, approximately 95% of the mutations can be detected by sequence analysis of exons 4 through 9. If you isolated and analyzed DNA from a Li-Fraumeni patient, what genotype should you find in DNA isolated from a. normal tissue? b. malignant tissue?
The "Central Dogma" of molecular biology described by Watson and Crick describes
the passing of genetic information from DNA to RNA by translation. the passing of genetic information from RNA to protein by transcription. the inheritance of traits between generations. the production of energy in a cell. the directional flow of genetic information in cells.
The source of benzene as a chemical pollutant is ________
A) wood preservative B) petroleum products C) pulp and paper bleaching D) rubber compounds E) plastic manufacturing
Which of the following is a major problem for sessile animals?
a. As adults, they are haploid. b. They are unable to sexually reproduce. c. They are limited in the variety of food they can consume. d. They are not capable of locomotion during their lifetime. e. They are unable to escape unfavorable environmental conditions.