Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Supplemental Instruction Biology 212 Exam 2 Practice Test 1. What enzyme found in retroviruses allows them to use RNA instead of DNA as genetic material? A. DNA transcriptase B. DNA synthase C. polymerase D. reverse transcriptase E. Primase 2. Which of the following are the small circular extranuclear DNA molecules found in bacteria A. nucleoids B. nucleosomes C. pili D. plasmids E. chloroplasts 3. How can an environmental signal (molecule) turn on gene transcription in a bacterial operon? A. it blocks the promoter B. it activates the repressor C. it inactivates the repressor D. it activates the operator E. in inactivates the oppressor 4. What molecule complexes removes Introns from mRNA? A. repairons B. exons C. anticodons D. oncogenes E. spliceosomes 5. Which of the following statements is always true of a retrovirus? A. virus living in a host cell B. a very primitive virus C. has RNA genome D. has no cell membrane E. a virus inserted into host DNA 6. In a bacterial operon system, what unit does RNA polymerase enzyme attach to? A. the operator B. the promoter C. the regulator D. the exon E. the repressor 7. What element of the operon does a repressor protein attach to? A. the repressor B. the structural gene C. the promoter D. the activator E. the operator 8. The Hershey and Chase experiment showed _________ to be the genetic material A. protein B. amino acids C. DNA D. tRNA E. mRNA 9. In DNA adenine pairs with: A. uracil B. cytosine D. thymine 10. The steps of protein synthesis in order are: A. transcription, translation, RNA processing B. initiation, RNA processing, transcription, translation C. transcription, RNA processing, translation D. translation, RNA processing, transcription C. guanine 11. Protein synthesis occurs on/in a: A. mitochondria B. ribosome D. strand of DNA E. Nucleus C. amino acid 12. An Okazaki fragment A. occurs on the leading strand B. occurs on the lagging strand C. is essential to protein synthesis D. occurs only in RNA 13. All of the following are DNA EXCEPT: A. Adenine B. Guanine D. Thymine E. Cytosine C. Uracil 14. ___________ is the enzyme responsible for producing the short RNA sequences used to initiate DNA replication A. primase B. ATP synthase C. helicase D. telomerase E. DNA polymerase 15. A change in the nucleotide sequence of an organism’s DNA that results in the insertion of a nucleotide base is called a _____________ mutation A. frameshift B. silent C. missense D. nonsense E. none of the above 16. Which of the following information transfers is catalyzed by DNA polymerase? A. RNA RNA B. DNA RNA C. RNA DNA D. DNA DNA E. RNA Protein 17. The anticodon of a particular tRNA molecule is A. complementary to the corresponding mRNA codon B. complementary to the corresponding triplet in rRNA C. part of the tRNA that bonds to a specific type of amino acid D. Changeable, depending on the amino acid that attaches to the tRNA E. the “active site” of the tRNA enzyme 18. If a gene contains 900 nucleotides, how many amino acids will be in the protein that it codes for? A. 30 B. 300 C. 900 D. 2700 E. could be any number 19. The stability of mRNA in the cytoplasm is dependent on A. 5’ Guanine cap. B. 5’ methylation of DNA. C. 3’ polyA tail D. 5’ acetylation of lysine E. A and C 20. Stage in gene expression that can NOT be regulated. A. chromatin structure B. transcription D. RNA stability E. none of the above C. RNA processing 21. The light reactions of photosynthesis supply the Calvin Cycle with A. photon energy B. H+ electrochemical gradient energy C. CO2 and H2O D. ATP and NADPH E. sugars and K+ 22. Which of the following processes is most directly driven by photon energy? A. Creation of a pH gradient across the thylakoid membrane. B. Oxidation of chlorophyll a in the reaction center C. Reduction of NADP+ in the stroma D. Production of O2 in the thylakoid space E. ATP synthesis in the stroma 23. In the light reactions what is the electron donor? A. chlorophyll P680 B. chlorophyll P700 D. CO2 E. O2 C. H2O 24. In the light reactions what is the ultimate electron acceptor? A. NADPH B. NADP+ C. NADH + D. NAD E. ADP 25. Cyclic electron flow is required in a photobacteria because A. Photobacteria lacks cellular respiration. B. Photobacteria cannot use NADPH. C. Photobacteria does not need to reduce NADP+. D. Photobacteria lacks photosystem II. E. Photobacteria lacks photosystem I. 26. Which of the following statement is a correct distinction between autotrophs and heterotrophs? A. Cellular respiration is unique to heterotrophs. B. Only heterotrophs have mitochondria. C. Only heterotrophs require O2. D. Only heterotrophs require chemical compounds from the environment. E. Only autotrophs have chloroplasts. 27. The chloroplast requires a third membrane compartment to A. contain the high H+ concentration created during photosynthesis. B. store the O2 produced during photosynthesis for cellular respiration. C. separate PSII and PSI. D. separate non-cyclic and cyclic electron flow during photosynthesis. E. store water for photosynthesis.