The work of Beadle and Tatum
1.showed that one gene seemed to affect one enzyme.
2.showed that protein was the genetic material.
3.showed that each gene seemed to affect several enzymes.
4.showed that DNA was the genetic material.
5.showed that each enzyme contained just one polypeptide.
1
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A common structure for proteins that bind DNA is helix-turn-helix
Indicate whether the statement is true or false.
Blood cultures are collected from a 36-year-old patient suspected of having a disseminated fungal infection. History reveals that she was exposed to bird droppings and may have inhaled the conidia. What is the best blood culture system to use to ensure optimal recovery of this pa-thogen?
a. BACTEC b. BacT/ALERT c. ESP system d. Isolator system
The fields of genomics and proteomics differ in that
A. genomics refers to the study of an organism's entire genome, whereas proteomics is the study of expressed proteins. B. genomics is the study of an organism's chromosomes and the resulting proteins are studied in the field of proteomics. C. the field of genomics involves the study of DNA replication and the field of proteomics refers to the study of transcription and translation. D. genomics is the study of an organism's chromosomes and proteomics is the study of transcription and translation of proteins.
Which of the following examples of natural selection has occurred over the course of our lifetime?
A. the rise of the domain Archaea B. the rise of different feeding habits in different species of finches on the Galápagos Islands C. the evolution of antibiotic-resistant bacteria D. a rise in the incidence of malaria