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exam ii - BIOL 1020 Principles of Biology 1 Exam II Each is...

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BIOL 1020: Principles of Biology Exam II 1. Each is a component of the DNA nucleotide except a: A. nitrogen base B. pentose sugar C. phosphate group D. fatty acid 2. The two strands of the DNA double helix are: A. parallel B. antiparallel C. polypeptides D. semiconservative 3. DNA replication is best described as being: A. dispersive B. conservative C. repressive D. semiconservative 4. RNA polymerase recognizes a(n) _______ sequence of the gene. A. origin B. promoter C. repressor D. operator 5. New aminoacyl-tRNAs (tRNA with attached amino acid) bind to mRNA at the _______ site of the ribosome. A. A B. B C. T D. P E. Z 6. The first amino acid in any protein is coded for by which codon? A. UGA which codes for leucine. B. UAA which codes for glycine. C. AUG which codes for methionine . D. UUA which is a stop codon E. Varies from protein to protein so it cannot be determined. 7. Pieces of mRNA that are transcribed from the DNA, but are NOT found in the mature mRNA molecule once it reaches the cytoplasm, are called: A. exons B. introns C. codons D. anti-codons 8. Okazaki fragments are: A. pieces of chromosomes created by topoisomerases B. made from 3' to 5' so that they can be joined together at the replication fork. C. made on the lagging strand from 5' to 3'. D. ligated together by DNA helicases. E. made on the leading strand from 5' to 3'. 9. DNA is always synthesized _____________ on both the leading and lagging strands? A. from 3'--->5' B. from 5'--->3' C. as the Okazaki fragment D. in both directions E. at the replication fork 10. Working with mutations in mould, Beadle & Tatum demonstrated relationship between one gene and one __________. A. lipid B. enzyme C. sugar D. amino acid 11. DNA molecules have: A. an alternating sugar-phosphate backbone C. 3 hydrogen bonds between A and T base pairs B. 2 hydrogen bonds between G and C base pairs D. all of the above E. none of the above 12. Nucleotides are fastened together by ____________ bond. A. glycosidic B. ester C. peptide D. phosphodiester 13. Eukaryotic mRNA is transcribed in ________________and translated in_______________.
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A. chloroplast/ nucleus B. mitochondria/ cytoplasm C. nucleus/ cytoplasm D.cytoplasm/ nucleus 14. Replicate this piece of DNA: 5'- TATGATCCCGTACCT
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exam ii - BIOL 1020 Principles of Biology 1 Exam II Each is...

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