Chapter 12 & 13

1. Chapter 12 & 13 DNA and RNA

2. 1 • The role of DNA is to ___. • A. Store, copy and create heredity information • B. Copy, modify and transmit heredity information • C. Store, copy and transmit heredity information

3. 2 • What is a bacteriophage? • A. A bacteria • B. A virus • C. a plant

4. 3 • DNA is made up of ________ joined into long strands or chains by covalent bonds. • A. nucleotides • B. amino acids • C. lipids

5. 4 • DNA as found by Watson and Crick has a _____________ shape. • A. circular • B. linear • C. double-helix

6. 5 • According to Chargaff’s rule of base pairing and how DNA is held together, ___ pairs with Guanine and ____ pairs with Thymine. • A. Cytosine; Adenine • B. Adenine ; Cytosine

7. 6 • _____________ is an enzyme that joins individual nucleotides to produce a new strand of DNA. • A. DNA replicator • B. DNA polymerase • C. DNA polymer

8. 7 • Replication in most _________ cells starts form a single point and proceeds in two directions until the entire chromosome is copied. • A. Prokaryote • B. Eukaryote

9. 8 • The main differences between RNA and DNA are that (1) the sugar in RNA is ____ ; (2) RNA is generally ______-stranded; (3) RNA contains __________. • A. ribose; double; uracil • B. ribose; single; thymine • C. ribose; single; uracil

10. 9 • In ____________, segments of DNA serve as templates to produce complementary RNA molecules. • A. Transcription • B. Translation • C. Replication

11. 10 • The genetic code is read ____ “letters” at a time, so that each “word” is ____ bases long and corresponds to a single amino acid. • A. one • B. two • C. three

12. 11 • Ribosomes use the sequence of ______ to assemble amino acids into a polypeptide chain. • A. mRNA • B. rRNA • C. tRNA

13. 12 • The central dogma of molecular biology is that information is transferred from ________. • A. RNA to DNA to protein • B. protein to DNA to RNA • C. DNA to RNA to protein