BIOL 1201-Exam 2

BIOL 1201-Exam 2 - Biology Test 2 September 21, 2004 Other...

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Biology Test 2 September 21, 2004 Other Movement into a cell -Vesicle-mediated transport -endocytosis -exocytosis *Not moving through a membrane* What difference does this make if it is moved through a membrane or not? -The material is not freely roaming in cytoplasm. It is not incorporated in cell. Endocytosis -cell engulfs object, becomes membrane bound vesicle -phagocytosis- large object -pinocytosis- small object -receptor-mediated endocytosis- requires receptors Exocytosis -membrane bound vesicles fuse with cell membrane and expel contents The largest organelle in most cells is ________? Mitochondrion Ribosome Golgi complex Nucleus Which of the following organelles contain DNA? Nucleus Mitochondrion Golgi complex More than one of the above (nucleus and Mitochondrion) The cytoskeleton is composed of Ribosomes Mitochondria Microtubules Lysosomes Procaryotic -before true nucleus Eucaryotic -true nucleus Functions of different organelles Energy- mitochondrion + cytoplasm Movement- -Cytoskeleton + -Microtubules Shape -Actin -Intermediate filaments Recognize- -Membrane -Proteins in the membrane
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RER- -Rough Endoplasmic Reticulum -(it is rough because it has ribosomes)- site of protein synthesis Lysosomes- contain hydrolytic enzymes (catalyze hydrolysis reactions- break organic polymers) Link b/t recognition and movement- Signal Transduction Pathway September 23, 2004 Cell Walls (only in plants) -Completely different from the cell membrane (it will remain after existence of membr.) -Composed of carbohydrates -Separate entity from the cell -Completely structural (relatively passive; only provides support) -Plants- cell wall made of cellulose -Fungi- cell wall made of cellulose or chitin (amino sugars) -Bacteria-cell wall made of peptidoglycans (amino sugars and amino acids) Cell Adhesion (glues) -Plants -pectine (ripe fruit; makes the cell wall hard) -lectin -Animals- -collagen (connects our cells) Cell Adhesion (junctions): -plants- plasmodesmata (b/t cell walls)(allows cells to move items rapidly)(good/bad) -animals- tight junctions, intermediary junctions, and desmosomes (made of proteins; are located on cell membrane)(hold cells together) -gap junctions: similar to plasmodesmata (cytoplasmic connections)(cell memb. and cytoplasm are continuous The reduction portion of a redox reaction involves the 1. addition of oxygen 2. addition of electrons 3. removal of oxygen 4. removal of electrons In which of the following processes is the largest amount of ATP production during aerobic respiration? 1. Glycolysis 2. Kreb’s Cycle 3. Electron Transport Chain and Oxidative Phosphorylation The Kreb’s Cycle takes place in: 1. cytoplasm 2. stroma 3. mitochondrial matrix 4. intra-mitochondria membrane space
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In an actively respiring mitochondrion where would you expect to find the lowest pH? 1.
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This note was uploaded on 12/07/2010 for the course BIOL 1201 taught by Professor Wishtichusen during the Fall '07 term at LSU.

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BIOL 1201-Exam 2 - Biology Test 2 September 21, 2004 Other...

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