Biology 150 exam 1 chapter 1-6, Exams of Biology

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Biol 1 50 - Exam 1 Spring Name: This exam consists of six pages with two main sections. A multiple choice section consisting of 1 7 questions. Please circle clearly the letter you choose. There is only one correct answer for all the questions. Section two includes five short answer questions. Please restrict your answer to the space provided. The space provided should be an indication to you of the space needed for a full answer. This exam is meant for completion by 70 mins after start time. If you need calculators, feel free to use them. Please be ethical when it comes to academic integrity. You would only be doing yourselves a disservice… Have fun! February 17 th^2022 Montgomery College- Germantown Campus

6. Actin microfilaments, microtubules and intermediate filaments are all: (4 points) A. Components of the endomembrane system. B. Organelles specific to prokaryotes. C. Components of the cytoskeleton. D. Enzymes that catalyze ATP hydrolysis. E. Different polymers of glucose.
7. Hydrogen bonds: (4 points) A. connect the bases Adenine and Guanine to Thymine and Cytosine, respectively, in double- stranded DNA. B. allow water to slowly change temperature when exposed to sunlight. C. help plants overcome the force of gravity in transporting water to branches and leaves. D. are the major bonds that form alpha-helical structures in proteins. E. All of the above are correct. 8. The sharing of an electron pair between two atoms is the chemical basis for: ( points) A. ionic bonds B. Vander Waal’s forces C. covalent bonds D. hydrogen bonds E. junk bonds 9. DNA is similar to RNA in which of the following ways? (4 points) A. Both DNA and RNA contain the nitrogenous bases Guanine, Adenine, and Cytosine. B. Both DNA and RNA nucleotides have hydroxyl groups at the 2’ positions of their respective sugar molecules. C. Both DNA and RNA can exist are double-stranded molecules. D. Both A and B are correct. E. Both A and C are correct.
8. Hydrolysis reactions are normally associated with: ( 5 points) A. forming peptide bonds between two amino acids B. breaking down glycogen into simple sugars C. forming glyosidic bonds between two monosaccharides D. breaking down protein into amino acids E. Both A and C are correct F. Both B and D are correct

11. What would happen if KOH was added to water? ( 5 points) A. It dissociates into K+^ and OH- B. The pH of the solution decreases C. The solution turns basic D. The water has less free H+ E. A and B are correct F. A, B and C are correct G. A, B and D are correct H. A, C and D are corrects I. All of the above
12. In the figure below, the top triglyceride has-----, and the bottom triglyceride has------( 5 points) A. Double bonds and is saturated; no double bonds and is unsaturated B. No double bonds and is saturated; double bonds and is unsaturated C. No double bonds and is unsaturated; double bonds and is saturated D. Double bonds and is unsaturated; double bonds and is unsaturated E. Double bonds and is unsaturated; no double bonds and is saturated
13. Which of the following phrases best describes the results of natural selection? ( 5 points) A. the natural variation found in all populations B. driver of evolution and adaptation C. survival of the fittest D. the changes in the inherited characteristics of a population E. B and C are both correct F. B and D are both correct G. B, C and D are correct H. All of the above
14. If 14 C-labeled adenine is added to the growth medium of cells, what macromolecules will be labeled? (4 points) A. DNA B. RNA C. Both DNA and RNA D. Polypeptides

19. For each of the following, indicate whether it is found in prokaryotes, eukaryotes, or both: (A) ( 1 point) DNA (B) ( 1 point) Internal membranes (C) ( 1 point) Mitochondria (D) ( 1 point) Ribosomes (E) ( 1 point) Plasma membrane 20. Name the two main properties of water that allow plants to get water to their leaves against gravity. Briefly explain how each of those contribute to water defying gravity.( 5 points) 21. Using the below figure and the provided periodic table, identify the element represented here. Explain your reasoning. (5points) 22. In your own words, explain what Darwin’s observations where and what he inferred from such observations. ( 5 points)