old exam questions Part 3 and 4

old exam questions Part 3 and 4 - Biology 141-Spell Old...

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1 of 22 Biology 141-Spell Old Exams Part 3 and 4 The order, format, and topics may be different in our exam from those in these exams. These questions are provided to give you a way to test your knowledge. These exam questions are taken from previous years exams and may not represent the exact coverage or exam structure for this year. The topics included in this collection include biological chemistry, and biomolecule structure and function (nucleic acids, proteins, carbohydrates, and lipids). Many of the graphics are unfortunately lost in the transfer. The best use of these questions is for you to learn what topics you need to study. Just being able to answer these questions will not help you because you will not be asked THESE questions. However, the understanding involved in answering these questions will be tested on the real exam. Be sure that you can explain WHY an answer is correct. ANSWERS WILL NOT BE PROVIDED BY THE PROFESSOR OR THE BIOMENTORS. 1. Under what circumstances does movement across a membrane always require energy? a. whenever moving molecules are too big to cross directly through the phospholipid bilayer membrane b. whenever a solute needs to be moved from low concentration to high concentration c. whenever a solute is charged, such as an ion d. whenever a molecule is polar 2. You’ve just discovered an organism that lives in extremely cold environments. Which of the following would you predict to be true about the phospholipids in its membranes? a. They will have extremely long hydrocarbon tails. b. Their hydrocarbon tails will be short and saturated. c. Their hydrocarbon tails will be short and highly unsaturated. d. They contain no cholesterol. 3. A simple biological model for studying cell membranes involves forming red blood cell ghosts. These are formed by placing red blood cells in a solution that causes them to swell and burst open, releasing all of their cytoplasmic contents. Which of the following could be used to form red blood cell ghosts? a. a hypotonic solution b. a hypertonic solution c. an isotonic solution d. either an isotonic or a hypotonic solution 4. Which of the following organelles is present in all cells? a. mitochondria b. ribosomes c. nucleus d. golgi e. RER 5. The correct order for the secretion of a protein hormone is: a. golgi => RER => ribosome => transport vesicle => plasma membrane b. ribosome => transport vesicle => RER => golgi => plasma membrane c. RER => golgi => ribosome => transport vesicle => plasma membrane d. ribosome => golgi => transport vesicle => RER => plasma membrane
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2 of 22 e. ribosome => RER => golgi => transport vesicle => plasma membrane 6. The movement of cilia and flagella is due to a. actin and myosin sliding past one another b. actin filaments “walked” by myosin c. microtubules “walked “ by actin d. microtubules “walked “ by dynein, powered by ATP e. microfilaments “walked” by kinesin, powered by ATP 7. The theory of endosymbiosis to explain the origin of some eukaryotic organelles
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This note was uploaded on 10/17/2011 for the course BIO 141 taught by Professor Dr.cafferty during the Fall '11 term at Emory.

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old exam questions Part 3 and 4 - Biology 141-Spell Old...

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