BIO6 - Howard(clh2528 – Homework 6 – sathasivan...

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Unformatted text preview: Howard (clh2528) – Homework 6 – sathasivan – (48985) 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Ribosomes are the structures in which 1. sunlight energy is converted into chemical energy. 2. genetic information is used to make pro- teins. correct 3. new organelles are made. 4. cell division is controlled. 5. chemical energy is stored by making ATP. Explanation: 002 10.0 points If a person were to overdose with a prese- cription medicine, which of the following cell structures would be highly active? 1. Golgi apparatus 2. Mitochondia 3. Smooth ER correct 4. Central vacuole 5. Ribosomes Explanation: Smooth ER helps in detoxifying drugs and toxic compounds and liver is highly active in such detoxification with abundant smooth ER. 003 10.0 points Which of the following is the most direct path that a potassium ion (K + ) takes to overcome cellular barriers in order to pass from the soil into the vacuole? 1. cell wall → plasma membrane → tono- plast → grana 2. primary cell wall → plasma membrane → tonoplast correct 3. primary cell wall → secondary cell wall → tonoplast 4. secondary cell wall → plasma membrane → thylakoid 5. cell wall → plasma membrane → grana Explanation: The tonoplast surrounds the vacuole and the primary cell wall is the outermost bound- ary. Next to the cell wall is the plasma mem- brane. 004 10.0 points Which of the following organelles contains DNA? I) ribosomes; II) mitochondria; III) chloroplasts. 1. III only 2. II only 3. II and III only correct 4. I only 5. I, II and III Explanation: Of the three organelles, ribosomes contain only RNA. 005 10.0 points In the digestive tract adjacent cells develop connections to form a sheet that prevents leakage of small molecules. What are these cell connections called? 1. communicating junctions 2. desmosomes Howard (clh2528) – Homework 6 – sathasivan – (48985) 2 3. gap junctions 4. tight junctions correct 5. ion gates Explanation: Tight junctions prevent leaks. 006 10.0 points Which statement best describes the relation- ship between cells, DNA, and proteins?...
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This note was uploaded on 03/22/2011 for the course BIO 311C taught by Professor Satasivian during the Spring '08 term at University of Texas.

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BIO6 - Howard(clh2528 – Homework 6 – sathasivan...

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