BIO201 Topic 3: Cell Biology Quiz (updated 2021) | graded A+ | 35.00 out of 35.00 (100%) | Straighterline

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BIO201 Topic 3: Cell Biology Quiz September 2021 Question 1 The lower limit of resolution of a light microscope is Select one: a. 100μm b. 0.1μm c. 10μm d. 0.01μm e. 1.0μm Question 2 What structu... re does "C" represent on the diagram of the plasma membrane? Select one: a. membrane channel protein b. phospholipid bilayer c. internal membrane surface d. peripheral protein e. integral protein Question 3 What structure does "B" represent on the diagram of the plasma membrane? Select one: a. membrane channel protein b. phospholipid bilayer c. internal membrane surface d. peripheral protein e. integral protein Question 4 What structure does "E" represent on the diagram of the plasma membrane? Select one: a. membrane channel protein b. phospholipid bilayer c. internal membrane surface d. peripheral protein e. receptor protein Question 5 What structure does "A" represent on the diagram of the plasma membrane? Select one: a. membrane channel protein b. phospholipid bilayer c. internal membrane surface d. peripheral protein e. integral protein Question 6 Which of the following is NOT true of a transmission electron microscope (TEM)? Select one: a. The limit of resolution is about 0.1nm. b. Electrons are passed through the specimen. c. Gives the clearest three-dimensional images. d. The specimen must be fixed in plastic. e. The electron beam is focused with electromagnets. Question 7 Which of the following is NOT a characteristic function of a cell? Select one: a. reproduction and inheritance b. metabolism and energy use c. movement d. synthesis e. communication Question 8 The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "B"? Select one: a. directs cellular activities, contains DNA b. contains digestive enzymes c. outer boundary of cell, controls entry and exit of substances d. major site of ATP synthesis when oxygen is available e. site of protein synthesis Question 9 Which of the following would increase the maximum rate of facilitated diffusion? Select one: a. increase the concentration gradient of the transported molecule to the saturation point b. decrease the concentration gradient of the transported molecule c. increase the concentration of the competitive molecules d. increased ATP synthesis e. None of these choices is . Question 10 In ______________, carrier molecules move a substance against (up) the concentration gradient. Select one: a. simple diffusion b. exocytosis c. facilitated diffusion d. active transport e. endocytosis Question 11 In general, water-soluble molecules diffuse through the ______ ______; and lipid-soluble molecules diffuse through the ______ ______. Select one: a. membrane channels; membrane channels b. membrane channels; lipid bilayer c. lipid bilayer; membrane channels d. lipid bilayer; lipid bilayer e. None of these choices is . Question 12 Cells of the small intestine and kidney tubules have extensions that increase their surface area called Select one: a. cilia. b. hairs. c. ruguae. d. microvilli. e. flagella. Question 13 Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is solution "C" relative to the RBC? Select one: a. hypotonic solution b. hypertonic solution c. isotonic solution d. hemolyzed e. crenated Question 14 The structural RNA of ribosomes is a Select one: a. pre-mRNA. b. proenzyme. c. gene. d. ribosomal RNA (rRNA). e. codon. Question 15 Answer these questions about chromosome structure. What does "C" represent? Select one: a. chromatid b. proteins c. chromosome d. centromere e. chromatin Question 16 DNA replication occurs during Select one: a. the G1 phase of interphase. b. telophase. c. the S phase of interphase. d. anaphase. e. metaphase. Question 17 In DNA replication, Select one: a. the leading strand is formed as a continuous strand. b. new nucleotides are added at the 5' end of the growing DNA strand. c. DNA polymerase splices the short segments of the lagging strand together. d. only introns are replicated. e. the two existing strands are not used as templates. Question 18 In which part of the cell cycle do chromosomes align along the equator? Select one: a. interphase b. prophase c. metaphase d. anaphase e. telophase Question 19 Messenger RNA Select one: a. is synthesized when a portion of a DNA molecule is transcribed. b. directs the synthesis of DNA. c. determines the sequence of nucleotides in the anticodons of tRNA. d. directs the synthesis of centrioles in the cytoplasm. e. is not involved in the synthesis of proteins. Question 20 Which of the following is NOT posttranslational processing? Select one: a. adding polysaccharide side chains to proteins b. joining 2 or more amino acid chains c. conversion of a pro-protein to a functional protein d. removal of introns from pre-mRNA e. conversion of a pro-enzyme to a functional enzyme [Show More]

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