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Practice Exam TWO - Practice Exam TWO 1 Which RNA carries...

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Practice Exam TWO 1. Which RNA carries the genetic code used for protein synthesis? (1) tRNA (2) rRNA (*) mRNA (4) cDNA (5) None of these 2. Heritable change in DNA: (1) Translation (2) Termination (3) Recombination (*) Mutation 3. The mechanism by which genes are transferred into bacteria via viruses is called: (1) Mutation (*) Transduction (3) Transformation (4) Conjugation 4. Which of the following is not true about spikes? (1) They are used for attachment (2) They are only found on enveloped viruses (3) They are present on the surface of the virus (*) They are used for penetration 5. An enzyme that cuts double-stranded DNA at specific nucleotide sequences. (1) RNA polymerase (*) Restriction enzyme (3) DNA ligase (4) DNA polymerase 6. In which of the following ways do viruses differ from bacteria? (*) Viruses are not composed of cells (2) Viruses don't have any nucleic acid (3) Viruses are obligate intracellular parasites (4) Viruses are filterable 7. Fungal diseases are generally referred to as: (*) Mycoses (2) Systemic (3) Infections (4) Parasitic (5) Infestation 8. DNA is constructed of (1) Nucleotides bonded A-C and G-T.
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(2) A single strand of nucleotides with internal hydrogen bonding. (3) Two strands of identical nucleotides with hydrogen bonds between them. (*) Two strands of nucleotides running antiparallel 9. Genetic change in bacteria can be brought about by (1) Transformation. (*) All of these (3) Mutation. (4) Transduction. (5) Conjugation. 10. Which of the following statements is TRUE for ribosomes (1) Ribosomes contain RNA (2) Ribosomes in prokaryotes are different in ribosomes in eukaryotes (3) Ribosomes are made of RNA and proteins (4) Ribosomes are where proteins are synthesized (*) All of these 11. Which of the following pairs is mismatched? (1) Transposase --- insertion of DNA segments into DNA (2) DNA polymerase --- repair damage to DNA (3) DNA ligase --- joins segments of DNA (4) DNA polymerase --- makes a molecule of DNA from a DNA template (*) RNA polymerase --- makes a molecule of RNA from an RNA template 12. A clear area against a confluent "lawn" of bacteria is called a (1) Pock (*) Plaque (3) Phage (4) Cell lysis 13. This RNA carries amino acid and brings it to the site of protein synthesis (1) dsRNA (*) tRNA (3) mRNA (4) ssRNA (5) rRNA 14. In transcription, (1) Proteins are made (*) DNA is copied to RNA (3) DNA is changed to RNA (4) RNA is copied to DNA (5) DNA is replicated 15. Some viruses, such as Human Herpes Virus 1, infect a cell without causing symptoms; these are called (1) Phages (*) Latent viruses (3) Lytic viruses (4) Slow viruses
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(5) Unconventional viruses 16. The polymerase chain reaction, PCR, is used to: (1) Amplify RNA (2) Polymerize amino acids (*) Amplify sections of DNA (4) Synthesize protein 17. The most common vector used for cloning genes is: (1) Viruses (2) Ribosome (3) Bacteria (*) Plasmids 18. Transformation is the transfer of DNA from a donor to a recipient cell (1) By help of a virus (2) By sexual reproduction (3) By direct cell-to-cell contact (4) By crossing over.
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