1. When using adult genetic material to clone a mammal, which of the following is a problem? 1.clones tend to have health problems 2.not all genes in the clone are properly activated 3.clones age and die younger than normal animals 4.all of the choices 12345

2. Inherited genetic information is coded in molecules of ________. 1.RNA 2.DNA 3.proteins 4.amino acids 12345

3. If a virus with radioactive DNA infects a bacterium, which part will then be radioactive? 1.the viral protein coat 2.the bacterial protein coat 3.the bacterial RNA 4.the viral DNA inside the bacterium 12345

4. ________ is a component of proteins, and ________ is a component of DNA. 1.sulfur, phosphorus 2.phosphorus, sulfur 3.phosphorus, amino acids 4.amino acids, sulfur 12345

5. DNA contains all of the following nitrogen- containing bases except ________. 1.adenine 2.guanine 3.thymine 4.uracil 12345

6. In the DNA double helix, which chemical group faces outward? 1.the bases 2.the charged phosphate group 3.the hydrogen bonds 4.the sugar group 12345

7. In the DNA molecule, hydrogen bonds form between ________. 1.sugar and phosphate groups 2.base pairs 3.the nitrogen base and sugar groups 4.phosphate groups and the nitrogen base 12345

8. The diversity of DNA is due to the ________. 1.bonding patterns 2.sugar-phosphate backbone 3.number of bases 4.variation in base sequences 12345

9. Semiconservative replication means that each new DNA molecule contains ____. 1.slightly different code 2.the same code but all new nucleotides 3.one new strand and one old strand 4.a single helix 12345

10. In DNA replication, the parent strand ________. 1.reproduces itself exactly 2.binds random free nucleotides 3.acts as a template to bind complementary nucleotides 4.all of the choices 12345

11. Which enzyme seals together new nucleotides attached to a parent strand of DNA? 1.DNA polymerases 2.DNA ligases 3.hydrogenases 4.helicases 12345

12. Which of the following is not a function of DNA polymerase? 1.it binds free nucleotides to a DNA parent strand 2.it splits phosphate groups from free nucleotides during strand assembly 3.it corrects base-pair mismatches 4.it assembles new strands in the 3'-5' direction 12345

13. DNA proofreading mechanisms include ________. 1.DNA polymerase 2.repair enzymes 3.glycosylases 4.all of the choices 12345

14. Discontinuous assembly on a parent DNA strand occurs because nucleotides ________. 1.are assembled randomly 2.can only be joined to an exposed -OH group 3.can only be joined to phosphate groups 4.can only be joined by DNA polymerases 12345

15. The term "cloning" applies to ________. 1.making multiple copies of DNA fragments 2.the natural occurrence of identical twins 3.the introduction of an adult nucleus into egg cytoplasm 4.all of the choices 12345

16. Cloning an adult mammal eliminates ________. 1.sexual reproduction 2.genetic mixing 3.fertilization 4.all of the choices 12345

17. Therapeutic cloning places DNA from an ________ into a stripped ________ cell. 1.adult cell, egg 2.early embryo, egg 3.adult organ, stem 4.early embryo, stem 12345

18. Which cloning procedure does not use genetic material from differentiated cells? 1.therapeutic cloning 2.adult cloning 3.embryo cloning 4.reproductive cloning 12345

19. Cloned animals may be comparable to the original donor in ________ but not ________. 1.appearance, behavior 2.behavior, age 3.appearance, genetic composition 4.genetic composition, appearance 12345

20. Franklin's x-ray diffraction images revealed the ________ of DNA. 1.helical structure 2.genetic function 3.replication method 4.base pairing 12345