Exam I Biology 111 – Spring 2013 Dr. David H. Bos INSTRUCTIONS: The use of calculators, cell phones or other electronic devices is not allowed during
... [Show More] the exam. There are 35 questions on this exam. There is only one correct answer for each question. Read each question carefully and choose the best answer. Do not fill in multiple answers, as they will be marked incorrect. Turn in only the answer sheet when you are done. You may keep the exam. Take your time, think and good luck! 1. Which of the following processes is dependent on cells’ ability to grow and divide? a. Photosynthesis b. Glycolysis and the Krebs cycle c. Gene expression d. Growth and development e. Hormone production and cell communication 2. Two chromosomes that have the same genes but different alleles for those genes would be described as: a. Sister chromatids b. Nucleosomes c. Completely condensed chromosomes d. Chromosomes held together by their centromeres e. Homologous chromosomes 3. Solenoid levels of DNA compaction are commonly seen during which phase of the cell cycle? a. S b. G0 c. Anaphase d. Metaphase e. Prophase 4. Under which conditions would you expect to see both DNA replication and separation of the DNA going on at the same time? a. Binary fission b. Mitosis of a diploid organism c. Meiosis I d. Meiosis II e. Under no circumstances can DNA replication and separation occur at the same time 5. Imagine a diploid organism with 20 chromosomes (10 pairs). How would you characterize the chromosomes for a cell of this organism at the end of prophase of mitosis? a. 10 chromosomes, each with two chromatids b. 20 chromosomes, each with one chromatid c. 20 chromosomes, each with two chromatids d. 40 chromosomes, each with one chromatid e. 40 chromosomes, each with two chromatids 6. Imagine a diploid organism with 20 chromosomes (10 pairs). How would you characterize the chromosomes and cells of this organism at the end of prophase II of meiosis? a. Haploid, 20 chromosomes, each with two chromatid [Show Less]