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Midterm-2 Exam

Sample Questions

Student ID ______________

The exam will be composed of two sections. The first section will contain multiple-choice questions. The second section contains written answer questions. Marks awarded for the sample questions are shown in the left hand margin.

1. The complete set of chromosomes possessed by an organism is called a ____________. a. polyploid b. chromatin complement c. karyotype d. diploid 2. A bacterial cell transfers chromosomal genes to F– cells, but it rarely causes them to become F+. The bacterial cell is a. Hfr. b. lysogenic. c. auxtrophic. d. lytic. 3. ___________ can cause genes to move from one linkage group (i.e., chromosome) to another. a. Inversions b. Deletions c. X-rays d. Translocations e. Unequal crossing over 4. Bacterial DNA is stabilized by histone proteins. a. True b. False


Midterm-2 Exam

Sample Questions

Match numbers with the best letter choice: 5. Okazaki fragments 6. DNA primase 7. Holliday model 8. DNA proofreading a. supercoil removal b. RNA primer synthesis c. 3′ à 5′ exonuclease activity d. lagging strand e. single-strand breaks f. unidirectional replication g. leading strand h. phosphodiester bonds at DNA nicks

9. Over time, DNA replaced RNA as the primary carrier of genetic information, and the chemical stability of DNA is believed to be the key reason for this. Which attribute of DNA is the reason behind its chemical stability? a. DNA lacks a free hydroxyl group on the 2′-carbon atom of its sugar. b. Unlike RNA, DNA is usually double stranded. c. DNA does not usually form hairpin loops. d. One of the two pyrimidines found in DNA does not involve uracil. 10. In prokaryotes, rho-independent transcription termination depends on a secondary structure formed in a. the RNA polymerase that is transcribing the gene. b. the DNA template. c. the RNA that is being transcribed. d. a protein factor that binds to RNA polymerase....