BIO 202 - BIO 202 - EXAM 2 - SPRING 2000 1) The cortex of a...

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BIO 202 - EXAM 2 - SPRING 2000 1) The cortex of a cell often has the semisolid consistency of a gel in contrast to the more fluid state of the interior cytoplasm. This is due to A) microtubules. * B) actin filaments. C) the extracellular matrix. D) dynein. E) the smooth endoplasmic reticulum. 2) Cilia and flagella move A) when contraction of basal body triplets is powered by ATP. B) in opposite directions on the plasma membrane. C) in the same direction on the plasma membrane. D) when the central pair of microtubules produces ATP. * E) when the bending of microtubules is powered by ATP. 3) Which of the following organelles is enclosed by an envelope of two membranes? A) Golgi apparatus B) lysosome * C) chloroplast D) central vacuole E) ribosome 4) When a potassium ion (K + ) passes from the soil into the vacuole of a root cell, it encounters some cellular barriers. Which of the following is the most direct path the K + would take through these barriers? A) primary cell wall ¬ secondary cell wall ¬ tonoplast * B) primary cell wall ¬ plasma membrane ¬ tonoplast C) cell wall ¬ plasma membrane ¬ grana D) cell wall ¬ plasma membrane ¬ tonoplast ¬ grana E) secondary cell wall ¬ plasma membrane ¬ thylakoid 5) According to the fluid-mosaic model of cell membranes, which of the following is a true statement about membrane phospholipids? A) They occur in an uninterrupted bilayer, with membrane proteins restricted to the surface of the membrane. B) They have hydrophilic tails in the interior of the membrane. * C) They can move laterally along the plane of the membrane.
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E) They frequently flip-flop from one side of the membrane to the other. 6) In animal cells, hydrolytic enzymes are packaged to prevent general destruction of cellular components. Which of the following organelles functions in this compartmentalization? A) peroxisome * B) lysosome C) central vacuole D) chloroplast E) glyoxysome 7) All of the structures listed below are associated with movement in cells or by cells EXCEPT * A) peroxisomes. B) centrioles. C) flagella. D) microtubules. E) cilia. 8) Which of the following cell components is NOT directly involved in synthesis or secretion? A) ribosomes B) Golgi bodies C) smooth endoplasmic reticulum D) rough endoplasmic reticulum * E) lysosome 9) Which of the following relationships between cell structures and their respective functions is NOT correct? A) mitochondria; formation of ATP B) chromosomes; genetic control information C) cell wall; support, protection * D) chloroplasts; chief site of cellular respiration E) ribosomes; site of protein synthesis 10) Which of the following pairs is mismatched? A) nucleolus; ribosomal RNA
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This note was uploaded on 05/28/2011 for the course BIO 201 taught by Professor True during the Spring '08 term at SUNY Stony Brook.

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BIO 202 - BIO 202 - EXAM 2 - SPRING 2000 1) The cortex of a...

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