202pracexam1ans - Biology 202 Spring 2005 Exam 1 NAME:...

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Biology 202 NAME: Spring 2005 Exam 1 SECTION: MATCHING: Match the definition with the correct term. No answer will be used twice. 2 pts 1. _C___ A cell containing two sets of nuclear chromosomes (2n). 2. _O___ The enzyme that lengthens the ends of chromosomes. 3. _L___ RNA that is associated with ribosomal structure. 4. _A___ Ribosome site in which charged tRNAs (aminoacyl-tRNAs) enter the ribosome during translation elongation. 5. _B___ A mutant strain of a given organism that cannot synthesize a molecule required for growth and therefore must have the molecule supplied in the growth medium for it to grow. 6. _D___ Prokaryotic DNA polymerase responsible for removing RNA primers in DNA replication. 7. _K___ Region of DNA that contains specific nucleotide sequences that bind RNA polymerase and indicate where polymerase will begin transcription. 9. _I___ A change in DNA nucleotide sequence. 10. _N___ The complex that interacts with the ends of an RNA intron to release an intron and join two adjacent exons. a. A site f. haploid k. promoter b. auxotroph g. intron l. rRNA c. diploid h. mRNA
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d. DNA pol I i. mutation n. spliceosome e. DNA pol III j. P site o. telomerase MULTIPLE CHOICE: Choose the best answer from the answers provided. There is only one best answer for each question, unless otherwise indicated. 2 pts 1. One of the earliest events that distinguishes meiosis from mitosis occurs in prophase I and involves: a. Loss of the nuclear membrane b. Condensation of chromosomes c. Movement of chromosomes toward the poles d. Crossing over between homologous chromosomes 2. Which of the following enzymes does not require a free 3’ OH in order to polymerize new nucleic acids? a. Primase b. DNA pol III c. DNA pol I d. Ligase 3. Transcription is similar to DNA replication in that: a. it requires a DNA helicase to unwind the DNA. b. the newly synthesized RNA remains paired to the template DNA. c. nucleotide polymerization occurs only in the 5’ to 3’ direction. d. an RNA transcript is synthesized discontinuously and the pieces then joined together. 4. Which two scientists proposed the “one gene-one enzyme” hypothesis? a. Watson and Crick b. Beadle and Tatum c. Hershey and Chase d. Wilkins and Franklin 5. The polarity of a strand of DNA is determined by: a. the sequence of bases on the strand. b. the presence of a phosphate at one end of the molecule but not the other.
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This note was uploaded on 04/02/2008 for the course BIO 202 taught by Professor Howe during the Spring '06 term at New Mexico.

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202pracexam1ans - Biology 202 Spring 2005 Exam 1 NAME:...

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