25. Common factors affecting membrane fluidity include a.) temperature. b.) presence of cholesterol. c.) number of double bonds in the fatty acid chains. d.) length of phospholipid fatty acid chains. 26. Which of the following methods can separate proteins based on their mass? a.) centrifugation b.) gel filtration chromatography c.) SDS polyacrylamide gel electrophoresis d.) ion exchange chromatography 27. Which of the following statements regarding enzymes are correct? a.) Enzymes lower activation energy. b.) Enzymes are synthesized in the mitochondria. c.) Enzymes show a high degree of specificity for substrates. d.) Enzymes stabilize intermediates. 28. The ability of DNA to denature is important for which of the following processes? a.) DNA synthesis b.) nucleic acid hybridization experiments c.) RNA synthesis d.) formation of biomembranes 29. Repetitive DNA include which of the following? a.) SINES (e.g. Alu) b.) microsatellite DNA c.) duplicated or diverged genes d.) long-interspersed nuclear elements

25. Common factors affecting membrane fluidity include a.) temperature. b.) presence of cholesterol. c.) number of double bonds in the fatty acid chains. d.) length of phospholipid fatty acid chains. 26. Which of the following methods can separate proteins based on their mass? a.) centrifugation b.) gel filtration chromatography c.) SDS polyacrylamide gel electrophoresis d.) ion exchange chromatography 27. Which of the following statements regarding enzymes are correct? a.) Enzymes lower activation energy. b.) Enzymes are synthesized in the mitochondria. c.) Enzymes show a high degree of specificity for substrates. d.) Enzymes stabilize intermediates. 28. The ability of DNA to denature is important for which of the following processes? a.) DNA synthesis b.) nucleic acid hybridization experiments c.) RNA synthesis d.) formation of biomembranes 29. Repetitive DNA include which of the following? a.) SINES (e.g. Alu) b.) microsatellite DNA c.) duplicated or diverged genes d.) long-interspersed nuclear elements

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter4: Cell Structure

Section: Chapter Questions

Problem 41CTQ: How does the structure of a plasmodesma differ from that of a gap junction?

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