bis 2a genetics_sample_exam

bis 2a genetics_sample_exam - BIOLOGY 2A / GERHART/ UNIT 2...

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B IOLOGY 2A / G ERHART / UNIT 2 (G ENETICS ) SAMPLE EXAM I NSTRUCTIONS Y OU LL BENEFIT MOST IF YOU TAKE THIS PRACICE EXAM ON YOUR OWN , WITH NO NOTES AND WITHOUT LOOKING AT THE KEY . It will also help you if you WRITE DOWN your reasoning for each answer. Why are the answers you didn’t choose “wrong”? After you’ve taken the exam, score each question in terms of the level of understanding (from Bloom’s Taxonomy) required to answer it. The questions in this practice exam represent the types of questions that you might see on the actual exam (and they are in fact old exam questions from Bis2A). They are typical of the level of thinking that will be required of you. The exact topics and examples will, of course, be different …so. .. PLEASE DO NOT assume that studying this practice test will be sufficient preparation for the exam. The actual exam will be about half this long – it will have approximately 30 multiple choice questions, and about 1 page of multi-format questions.
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Choose the ONE best answer to each question, unless specifically told to choose two answers. 1. Choose the sequence of three bases (listed in order of insertion) that will first be incorporated into the leading strand of DNA when the given sequence is replicated from left to right as shown in the figure. A. G, C, C B. C, C, G C. G, G, C D. G, C, T E. C, G, G 2. A gene is A. any base sequence B. the instructions for a particular RNA or polypeptide C. a particular location on a chromosome D. any series of sense codons E. Both C and D 3. What is an acceptable definition of (biological) evolution? (Choose 2 answers) A. A change in gene frequency B. Progressive change C. Improved ability to survive and reproduce D. A change in the observable traits within a population over time E. A change in the observable traits of an individual over time 4. According to Darwin’s Theory, what is the cause of evolution? A. Mutations B. Differences in individual fitness C. Random deaths D. Genetic drift E. Differences in number of offspring produced 5. Large (multi-gene) duplications are a fairly common type of mutation. Which of these statements about duplications is true? A. they generally enhance the fitness of the genome B. they generally decrease the fitness of the genome, because of the extra energy required for their replication C. they generally enhance the fitness of the genome, because more is better D. they generally decrease the fitness of the genome, because they mess up regulation E. they are generally neutral 3’ 5’ 3’ 5’
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6. Why are multi-gene duplication mutations important in evolution? A. they are the only way that genomes can increase in size B. they tend to occur only in genes that are actively being expressed C. they allow a genome to retain a functional copy of a gene while allowing another copy of the gene to evolve D. they usually result in increased complexity E. multi-gene duplication mutations are not important events in the evolution of organisms 7. Below is the sequence of a region of a DNA molecule (note indicated strand polarity).
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This note was uploaded on 02/22/2010 for the course CHE che110b taught by Professor Franics during the Spring '10 term at Concord.

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bis 2a genetics_sample_exam - BIOLOGY 2A / GERHART/ UNIT 2...

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