final exam08 version A-2

final exam08 version A-2 - Final Exam Version A Name_SID_...

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Final Exam Version A Name_________________________________SID_______________________________ 1) The most common cause of cystic fibrosis results from a defective chloride ion channel protein in which a single amino acid, phenylalanine, is missing from the protein. The loss of this amino acid could be explained by which of the following changes to the gene encoding this protein? A) a frame shift mutation in the DNA B) the loss of an intron in the DNA C) a missense mutation in the DNA D) a deletion of three nucleotides in the DNA E) insertion of three nucleotides in the DNA 2) If there were no crossing over, how many genetically different gametes could hypotheically result from germ-line cells undergoing meiosis in which N=5? A) 10 B) 20 C) 32 D) 64 E) 2 10 3) For a given allele in a haploid cell, there is/are ___ identical copy/copies of this allele in G1 and ___ identical copy/copies of this allele in G2. A) 0,1 B) 1,1 C) 1,2 D) 2, 2 E) 2, 4 4) Sister chromatids A) are identical. B) possess different alleles for a given gene. C) exchange genetic information during prophase. D) are transcribed primarily during M phase. E) remain attached throughout the cell cycle. 5) A promoter A) is the site where DNA polymerase begins replication. B) is a protein that initiates transcription. C) determines which strand of DNA will be transcribed. D) provides the information for the start of translation. E) enhances the rate at which ribosomes translate mRNA. 1
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6) Upon chemical analysis, a particular polypeptide was found to contain 100 amino acids. How many peptide bonds are present in this protein? A) 101 B) 100 C) 98 D) 99 E) 97 7) Entropy always: A) decreases in open systems B) does not change in closed systems C) increases in open systems D) decreases in closed systems E) increases in closed systems 8) Transcription and replication I. are similar in that newly synthesized strands are assembled only in the 5' to 3' direction. II. are similar in that both begin with RNA. III. are different in that replication involves the entire DNA whereas transcription involves short segments of DNA. A) I only B) II only C) III only D) I and III only E) I, II and III 9) The goals of mitosis and meiosis I. are different in that only meiosis is designed to generate genetic diversity . II. are similar in that each is designed to preserve the N value of the parent cell. III. are similar in that each is designed to preserve the ploidy value of the parent cell. A) I only B) II only C) III only D) I and II only E) I, II and III 2
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10) Check points during the cell cycle prevent that cell from dividing under which of the following conditions? I. Its DNA is not completely replicated. II. The cell has limited resources. III. Its DNA is in need of repair.
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This note was uploaded on 03/27/2011 for the course BILD 1 taught by Professor Chen during the Winter '11 term at UC Riverside.

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final exam08 version A-2 - Final Exam Version A Name_SID_...

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