exam3ef - Name:_ Bcor 11 Exam III Question 1 Base-pair...

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Name:_______________________________________________ Bcor 11 Exam III Question 1 Base-pair substitutions involving the third base of a codon are unlikely to result in an error in the polypeptide. This is because A) substitutions are corrected before transcription begins B) substitutions are restricted to introns C) the base-pairing rules are less strict for the third base of codons and anticodons D) a signal-recognition particle corrects coding errors E) transcribed errors attract snRNPs, which then stimulate splicing and correction Questions 2-6 Please correctly match the discovery and the researchers responsible for them in the following questions: a. James Watson and Francis Crick b. Fritz Miecher c. Rosalind Franklin d. Alfred Hershey and Martha Chase e. Matthew Meselson and Franklin Stahl Question 2 Used radioactive sulfur and phosphorus to trace the fate of protein and DNA in phages. D Question 3 Captured a clear photo of DNA using X-Ray diffraction. C Question 4 Isolated nuclein from white blood cells, later determined to be DNA. B Question 5 Described the structure of DNA as a double helix in a landmark 1953 Nature paper. A Question 6 Provided evidence for the semi-conservative hypothesis of DNA replication. E Question 7 When chromosomes convene on an imaginary plane that is equidistant between the spindle’s two poles, this cell is said to be in what phase of the mitotic cycle? A) telophase B) prophase C) anaphase D) metaphase E) prometaphase
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Question 8 In a culture dish plated with mitotically active cells, a cell that has half as much DNA as other cells is most likely in A) anaphase B) prophase C) metaphase D) G1 E) G2 Question 9 What is the relationship among DNA, a gene, and a chromosome? A) A chromosome contains hundreds of genes, which are composed of protein. B) A chromosome contains hundreds of genes, which are composed of DNA. C) A gene contains hundreds of chromosomes, which are composed of protein. D) A gene is composed of DNA, but there is no relationship to a chromosome. E) A gene contains hundreds of chromosomes, which are composed of DNA. Question 10 Meiosis II is similar to mitosis in that A) homologous chromosomes synapse B) DNA replicates before the division C) The daughter cells are diploid D) Sister chromatids separate during anaphase E) The chromosome number is reduced Question 11 A part of an mRNA molecule with the following sequence is being read by a ribosome: 5' CCG-ACG 3' (mRNA). The following activated transfer RNA molecules are available. Two of them can correctly match the mRNA so that a dipeptide can form. tRNA Anticodon Amino Acid GGC Proline CGU Alanine UGC Threonine CCG Glycine ACG Cysteine CGG Alanine The dipeptide that will form will be A) cysteine-alanine. B) proline-threonine.
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exam3ef - Name:_ Bcor 11 Exam III Question 1 Base-pair...

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