By Wilson G.N., Schroeder B., Woo J.
Those "500 questions, solutions, and clarification" books are designed to simulate the USA scientific Licensing exam (USMLE) Step 1. each one is authored via a professional within the box and has been reviewed by means of scholars who've lately handed the examination. As Step 1 is changing into progressively more scientific in nature, while appropriate, medical vignette-style questions requiring a two-step reasoning strategy also are incorporated. the entire Pretest titles comprise a "high-yield" truth part to augment key options.
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The beginning of Species is the main recognized ebook in technological know-how yet its stature has a tendency to vague the genius of Charles Darwin's different works. The Beagle voyage, too, occupied in simple terms 5 of the fifty years of his profession. He spent purely 5 weeks at the Galapagos and on his go back by no means left Britain back. Darwin wrote six million phrases, in nineteen books and innumerable letters, on themes as varied as canine, barnacles, insect-eating vegetation, orchids, earthworms, apes and human emotion.
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Extra resources for Biochemistry and Genetics: Pretest Self-Assessment and Review
The western blot use what type of probe? a. b. c. d. e. f. g. qxd 11/14/01 10:37 AM Page 43 Gene Expression 43 54. What is the correct order of the following steps in protein synthesis? 1. A peptide bond is formed. 2. The small ribosomal subunit is loaded with initiation factors, messenger RNA, and initiation aminoacyl–transfer RNA. 3. The intact ribosome slides forward three bases to read a new codon. 4. The primed small ribosomal subunit binds with the large ribosomal subunit. 5. Elongation factors deliver aminoacyl-tRNA to bind to the A site.
D. e. RNA-catalyzed in the absence of protein Self-splicing Carried out by spliceosomes Controlled by RNA polymerase Regulated by RNA helicase 41. A promoter site on DNA a. b. c. d. e. qxd 40 11/14/01 10:37 AM Page 40 Biochemistry and Genetics 42. The σ factor found in many bacteria is best described as a a. Subunit of RNA polymerase responsible for the specificity of the initiation of transcription of RNA from DNA b. Subunit of DNA polymerase that allows for synthesis in both 5' to 3' and 3' to 5' directions c.
The tendency for certain HLA alleles to occur together (associate) on the same chromosome as haplotypes greatly reduces their odds of identity when compared to DNA fingerprinting. 25. The answer is e. (Murray, pp 412–434. Scriver, pp 3–45. Sack, pp 3–29. ) The AIDS treatment drug azidothymidine (AZT) exerts its effect by inhibiting viral reverse transcriptase. Thus, it prevents replication of the human immunodeficiency virus. Reverse transcriptase is an RNA-directed DNA polymerase. The RNA of retroviruses utilizes reverse transcriptase to synthesize DNA provirus, which in turn synthesizes new viral RNA.
Biochemistry and Genetics: Pretest Self-Assessment and Review by Wilson G.N., Schroeder B., Woo J.