bis 2a unit3_practice_exam

bis 2a unit3_practice_exam - BIOLOGY 2A / GERHART/ UNIT 3...

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B IOLOGY 2A / G ERHART / UNIT 3 (C ELLULARITY ) 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.
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Choose the best answer for each question. Mark more than one answer ONLY when SPECIFICALLY told to do so in the question. 1. New combinations of genes in bacteria result from all of the following except A. Transformation, the uptake of naked double-stranded DNA B. Conjugation, the transfer of a fertility plasmid C. Transduction, transfer of DNA by a virus D. Recombination, the exchange of DNA between replicated chromosomes. E. All of the choices cause new genetic combinations in bacteria 2. The mitochondria perform aerobic respiration in eukaryotic cells. The genes necessary to construct the proteins of the electron transport chain, the enzymes of the Krebs cycle, and the other structures found within the mitochondria, are housed in the A. nuclear DNA B. mitochondrial DNA C. chloroplast DNA D. Both A and B E. A, B, and C 3. Eukaryotic cells increase the likelihood of producing offspring with fitness equal to the parent cell through all except which TWO of the following A. increasing the genome size B. maintaining multiple chromosomes C. fusing two haploid cells to create a diploid cell D. increasing the rate of recombination between homologs E. exchanging plasmids 4. Two-step meiosis likely evolved from one-step meiosis to: A. provide a simpler way to form haploid cells from diploid cells B. Interfere with sister-killer genes during the creation of haploid cells from diploids C. Increase the likelihood of recombination D. Prevent the formation of tetraploid cells E. Encourage the formation of genders 5. When two cells fuse after meiosis, what determines whether a cell is ‘male’ or ‘female’? A. The ‘male’ travelled the farthest B. The ‘female’ retains its mitochondria (and perhaps, chloroplasts) C. ‘Male’ and ‘female’ only make sense in multicellular organisms D. The ‘male’ always makes more haploid cells than the ‘female’ E. The ‘female’ cares for the young
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6. Genome size (the amount of DNA in a haploid cell) differs more among life forms than does gene number. What TWO answers best explain this observation? A.
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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 unit3_practice_exam - BIOLOGY 2A / GERHART/ UNIT 3...

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