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Unformatted text preview: BioS 115 Exam 1 Version A _______________________ Genetics October 4, 2010 Name Page 1 of 5 IMPORTANT: Mak e s ur e you hav e your s c an t ron . Wri t e t h e e xam v e r s ion (A , B , C) on t h e an s w e r c ard! Wri t e your nam e on t hi s s h ee t . Th e r e ar e 47 qu e st ion s on t h e e xam , wor t h a t o t al of 94 poin ts . Pl e a s e r e ad t h e qu e st ion s c ar e fully . Alway s c hoo s e t h e MOST CORRECT an s w e r . Mark an s w e r s on t h e e xam s h ee t F IRST . Wh e n you ar e c onfid e n t t ha t your an s w e r s ar e c orr ec t , mark t h e s c an t ron s h ee t u s ing a No . 2 p e n c il . Thi s st ra t e gy avoid s e ra s ur e s on t h e s c an t ron s h ee t . Bo t h t h e e xam and s c an t ron s h ee ts will b e c oll ec t e d . 1. Which one of the following sequences is a palindrome? A) 5-ATTA- 3 B) 5-AGATCT- 3 C) 5-AGTAC- 3 D) 5-GGACC- 3 2. The base Thymine is NO T found in: A) DNA B) dTTP C) RNA D) dTMP 3. Loosely aggregated DNA bound to proteins in a eukaryotic cell is called A) chromosomes. B) chromatin. C) chromatid. D) centromere. E) nucleoid. 4. Antiparallel means that A) the two polynucleotide chains run in opposite directions. B) each DNA molecule consists of one old and one new strand. C) opposite strands are held together by base pairing. D) the helix twists to the right. E) there is complementary base-pairing. 5. DNA and RNA both contain phosphate and ribose. A) TRUE B) FALSE 6. Which of the following are components of eukaryotic nucleosomes? I: Histone H2A II: Histone H2B III: Histone H4 IV: DNA polymerase V: ~ 200 bp DNA VI: 100 bp RNA A) I+II+III+IV+V B) I+II+III+VI C) I+II+III+V D) I+III+V E) I+II+VI 7. During replication, the direction of synthesis of new DNA from the leading and lagging strands is A) 5' to 3' only. B) 3' to 5' only. C) from left to right only. D) both 5' to 3' and 3' to 5'. E) different, depending on whether the cell is prokaryotic or eukaryotic. 8. Which of the following numbers is closest to the estimated number of protein-coding genes in the human genome? A) 5,000 B) 10,000 C) 25,000 D) 50,000 E) 100,000 9. The nucleotide bases T and G are: A) purines B) pyrimidines C) T=pyrimidine D) G=pyrimidine G=purine T=purine BioS 115 Exam 1 Version A _______________________ Genetics October 4, 2010 Name Page 2 of 5 10. During transcription, the synthesis of the mRNA strand proceeds in which direction?...
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