BIO 264 Lesson 3 Exam Questions With Complete Solution

BIO 264 Lesson 3 Exam Questions With Complete Solution Large numbers of ribosomes are present in cells that produce which of the following molecules? steroids lipids glucose starches proteins - CORRECT ANSWER Protiens Which of the following pairs is mismatched? lysosome-protein synthesis cytoskeleton-microfilaments nucleus-DNA replication cell membrane-lipid bilayer Golgi apparatus-modification, processing, and sorting of macromolecules - CORRECT ANSWER lysosome-protein synthesis In eukaryotes, which of the following is NOT a function of the plasma membrane? barrier for separating extracellular and intracellular environments of a cell. cell-to-cell adhesion selective transport ATP synthesis cell signaling - CORRECT ANSWER ATP synthesis Which of the following is the major lipid found in membranes? Steroids cholesterol triglycerides phospholipids saturated fatty acids - CORRECT ANSWER Phospholipids Which of the following statements is TRUE of membrane phospholipids? a The hydrophilic head groups face the interior portion of the membrane. b The hydrophobic tail groups face the exterior portion of the membrane. c They freely move laterally within the membrane. d They rarely flip-flop across or move laterally within the membrane. - CORRECT ANSWER C Phospholipids and ________ are the major components of cell membranes. glycolipids cholesterol glucose transporters glycocalyx proteins - CORRECT ANSWER protiens Cilia are different from flagella in that the cilia are ________. - CORRECT ANSWER shorter and more numerous The aerobic cellular respiration (release of energy from food) of carbohydrates occurs in the __________. a Lysosome b Mitochondrion c Chloroplast d Flagellum - CORRECT ANSWER B Proteins in a membrane are: a peripheral if they are on the inside surface held in place by the cytoskeleton. b integral if they are embedded in the membrane and protrude from both surfaces of the bilayer. c integral if they protrude from only one surface of the bilayer. d All of the choices are correct. - CORRECT ANSWER B Which of these organelles produces large amounts of ATP? nucleus mitochondria ribosomes endoplasmic reticulum lysosomes - CORRECT ANSWER mitochondria Tissues such as the gonads that produce steroids are likely to be rich in what type of organelle? ribosome lysosome smooth endoplasmic reticulum mitochondria contractile vacuole - CORRECT ANSWER Smooth endoplasmic reticulum Which of the following is not a constituent of the nucleus? a pores b envelope or membrane c chromosomes d chromatin e protein modifying enzymes - CORRECT ANSWER E Tissues that are metabolically active and utilize large amounts of energy would be rich in ________. ribosomes lysosomes smooth endoplasmic reticulum mitochondria contractile vacuoles - CORRECT ANSWER D Which of the following is the major lipid found in membranes? Steroids cholesterol triglycerides phospholipids saturated fatty acids - CORRECT ANSWER D The following affect membrane fluidity EXCEPT ________. a glycoprotein composition b cholesterol c phospholipid composition d the length of the phospholipid fatty acyl tail e the relative amounts of phospholipids containing saturated or unsaturated fatty acyl tails - CORRECT ANSWER A The pressure required to stop water from moving across the membrane by osmosis is called _________. transport pressure crenation pressure atmospheric pressure osmotic pressure mechanical pressure - CORRECT ANSWER D