Bio 101 Fall 2011 Test 2

Bio 101 Fall 2011 Test 2 - 1) When biologists wish to study...

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1) When biologists wish to study the internal ultrastructure of cells, they can achieve the finest resolution by using A) a phase-contrast light microscope. B) a scanning electron microscope. C) a transmission electronic microscope. D) a confocal fluorescence microscope. E) a super-resolution fluorescence microscope. 2) A primary objective of cell fractionation is to A) view the structure of cell membranes. B) sort cells based on their size and weight. C) determine the size of various organelles. D) separate the major organelles so that their particular functions can be determined. E) separate lipid-soluble from water-soluble molecules. 3) All of the following are part of a prokaryotic cell except A) DNA. B) a cell wall. C) a plasma membrane. D) ribosomes. E) an endoplasmic reticulum. 4) The volume enclosed by the plasma membrane of plant cells is often much larger than the corresponding volume in animal cells. The most reasonable explanation for this observation is that A) plant cells are capable of having a much higher surface-to-volume ratio than animal cells. B) plant cells have a much more highly convoluted (folded) plasma membrane than animal cells. C) plant cells contain a large vacuole that reduces the volume of the cytoplasm. D) animal cells are more spherical, whereas plant cells are elongated. E) plant cells can have lower surface-to-volume ratios than animal cells because plant cells synthesize their own nutrients. 5) Which of the following is a major cause of the size limits for certain types of cells? A) limitation on the strength and integrity of the plasma membrane as cell size increases
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B) the difference in plasma membranes between prokaryotes and eukaryotes C) evolutionary progression in cell size; more primitive cells have smaller sizes D) the need for a surface area of sufficient area to support the cell's metabolic needs E) rigid cell walls that limit cell size expansion 6) Prokaryotes are classified as belonging to two different domains. What are the domains? A) Bacteria and Eukarya B) Bacteria and Archaea C) Archaea and Protista D) Bacteria and Protista E) Bacteria and Fungi
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7) Which organelle or structure is absent in plant cells? A) mitochondria B) Golgi vesicles C) microtubules D) centrosomes E) peroxisomes 8) Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids? A) ribosome B) lysosome C) smooth endoplasmic reticulum D) mitochondrion E) contractile vacuole 9) Which structure is the site of the synthesis of proteins that may be exported from the cell? A) rough ER B) lysosomes C) plasmodesmata D) Golgi vesicles E) free cytoplasmic ribosomes 10) Which plant cell organelle contains its own DNA and ribosomes? A) glyoxysome
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This note was uploaded on 12/02/2011 for the course CSC 100 taught by Professor Morgan during the Spring '11 term at Jackson State.

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Bio 101 Fall 2011 Test 2 - 1) When biologists wish to study...

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