Biology 3 - Biology 1020 Spring 2008 Exam 3 Version 1...

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Biology 1020 Spring 2008 Exam 3 Version 1 Multiple Choice - 52 questions total, 2 points each (Scoring basis: 100 points) Identify the letter of the choice that best completes the statement or answers the question. ____ 1. The nucleolus is the site in a cell where: a. tRNAs are made d. mRNAs are processed b. ribosome subunits are made e. translation occurs c. DNA is condensed into chromosomes ____ 2. The oxygen consumed during cellular respiration is involved directly in which process or event? a. the citric acid cycle b. accepting electrons at the end of the electron transport chain c. the phosphorylation of ADP to form ATP d. the oxidation of pyruvate to acetyl CoA e. glycolysis ____ 3. This protein is found in the extracellular matrix of animals, where it is the main structural component. a. dynein d. actin b. fibronectin e. integrin c. collagen ____ 4. These are double-membraned organelles with their own DNA, with membraned sacks called thylakoids, and with an interior lumen called the stroma. a. chloroplasts d. vesicles b. peroxisomes e. mitochondria c. Golgi apparatus ____ 5. Microfilaments are _______ than microtubules and are made of _______ . a. thicker; kinesin and dynein motors d. thinner; α -tubulin and β -tubulin dimers b. thicker; α -tubulin and β -tubulin dimers e. thinner; actin monomers c. thicker; actin monomers ____ 6. Cell theory states that: a. All cells living today originated from a common ancestor. b. All living organisms have a cell wall. c. Presently living cells fall into several unrelated groups. d. New cells today can be made from nonliving material without existing cells. e. All cells have membrane-bound organelles. ____ 7. In C 4 plants and CAM plants, the reaction that initially fixes CO 2 into a four-carbon compound is catalyzed by the enzyme: a. pyridoxal kinase. d. rubisco. b. phosphofructokinase. e. PEP carboxylase. c. ATP synthase. ____ 8. These organelles have their own DNA and their own “cell” division, which is explained by the endosymbiont theory that holds that these organelles were once free-living bacterial cells that came to reside in ancient eukaryotic cells. a. ER and Golgi apparatus d. mitochondria and plastids
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b. mitochondria and microbodies e. microbodies and vacuoles c. plastids and microbodies ____ 9. A process that allows protons (H + ) to move against their concentration gradient across a biological membrane using a protein channel would be best termed as: a. pinocytosis d. facilitated diffusion b. exocytosis e. active transport c. simple diffusion
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____ 10. Insulin is secreted as a free protein (not membrane-bound) by certain cells of the mammalian pancreas. Insulin must: a. be synthesized free in the cytoplasm, then pass through the lumen of the Golgi apparatus before secretion b. be synthesized in the lumen of the Golgi apparatus, then pass through the ER lumen before secretion c. be inserted into the ER lumen as it is made, then pass free through the cytoplasm before secretion d. be synthesized in the lumen of the Golgi apparatus, then pass free through the cytoplasm
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This note was uploaded on 04/17/2008 for the course BIOL 1020 taught by Professor Dute during the Spring '06 term at Auburn University.

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Biology 3 - Biology 1020 Spring 2008 Exam 3 Version 1...

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