{"id":23729,"date":"2019-08-13T22:48:10","date_gmt":"2019-08-14T03:48:10","guid":{"rendered":"http:\/\/www.kaptest.com\/blog\/prep\/?p=23729"},"modified":"2022-11-09T21:53:30","modified_gmt":"2022-11-09T21:53:30","slug":"mcat-biochemistry-quiz","status":"publish","type":"post","link":"https:\/\/wpapp.kaptest.com\/study\/mcat\/mcat-biochemistry-quiz\/","title":{"rendered":"MCAT Biochemistry Quiz"},"content":{"rendered":"<p>Once you&#8217;re familiar with the <a title=\"MCAT Biochemistry\" href=\"https:\/\/www.kaptest.com\/study\/mcat\/mcat-practice-questions-biochemistry\/\">MCAT Biochemistry section<\/a>, take this quiz to test your readiness.<\/p>\n\n\n<div><div class='op-interactive' id='636581bfe10da466c0f0adb2' data-title='MCAT Biochemistry Quiz' data-url='https:\/\/kaplannorthamerica.outgrow.us\/636581bfe10da466c0f0adb2?vHeight=1' data-width='100%'><\/div><script src='\/\/dyv6f9ner1ir9.cloudfront.net\/assets\/js\/nloader.js'><\/script><script>initIframe('636581bfe10da466c0f0adb2');<\/script><\/div>\n\n\n\n\t<div   class='av_promobox  avia-button-no   avia-builder-el-0  el_before_av_toggle_container  avia-builder-el-first '>\t\t<div class='avia-promocontent'><p>\n<strong>Question 1<\/strong><br \/>\nWhich of the following statements about enzyme kinetics is FALSE?<br \/>\nA.\u00a0An increase in the substrate concentration (at constant enzyme concentration) leads to proportional increases in the rate of the reaction.<br \/>\nB.\u00a0Most enzymes operating in the human body work best at a temperature of 37\u00b0C.<br \/>\nC.\u00a0An enzyme\u2013substrate complex can either form a product or dissociate back into the enzyme and substrate.<br \/>\nD.\u00a0Maximal activity of many human enzymes occurs around pH 7.4.<\/p>\n<\/div><\/div>\n\n\n<div  class=\"togglecontainer   toggle_close_all  avia-builder-el-1  el_after_av_promobox  el_before_av_promobox \" >\n<section class=\"av_toggle_section\"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\"  >    <div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  >        <p data-fake-id=\"#toggle-id-1\" class=\"toggler \"  itemprop=\"headline\"    role=\"tab\" tabindex=\"0\" aria-controls=\"toggle-id-1\">Answer 1<span class=\"toggle_icon\" >        <span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p>        <div id=\"toggle-id-1\" class=\"toggle_wrap \"  >            <div class=\"toggle_content invers-color \"  itemprop=\"text\"   ><p><b>A:<\/b> Most enzymes in the human body operate at maximal activity around a temperature of 37\u00b0C and a pH of 7.4, which is the pH of most body fluids. In addition, as characterized by the Michaelis\u2013Menten equation, enzymes form an enzyme\u2013substrate complex, which can either dissociate back into the enzyme and substrate or proceed to form a product. So far, we can eliminate choices (B), (C), and (D), so let\u2019s check choice (A). An increase in the substrate concentration, while maintaining a constant enzyme concentration, leads to a proportional increase in the rate of the reaction only initially. However, once most of the active sites are occupied, the reaction rate levels off, regardless of further increases in substrate concentration. At high concentrations of substrate, the reaction rate approaches its maximal velocity and is no longer changed by further increases in substrate concentration.<\/p>\n            <\/div>        <\/div>    <\/div><\/section>\n<\/div>\n\n\n\t<div   class='av_promobox  avia-button-no   avia-builder-el-2  el_after_av_toggle_container  el_before_av_toggle_container '>\t\t<div class='avia-promocontent'><p>\n<strong>Question 2<\/strong><br \/>\nWhich two polysaccharides share all of their glycosidic linkage types in common?<br \/>\nA.\u00a0Cellulose and amylopectin<br \/>\nB.\u00a0Amylose and glycogen<br \/>\nC.\u00a0Amylose and cellulose<br \/>\nD.\u00a0Glycogen and amylopectin<\/p>\n<\/div><\/div>\n\n\n<div  class=\"togglecontainer   toggle_close_all  avia-builder-el-3  el_after_av_promobox  el_before_av_promobox \" >\n<section class=\"av_toggle_section\"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\"  >    <div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  >        <p data-fake-id=\"#toggle-id-2\" class=\"toggler \"  itemprop=\"headline\"    role=\"tab\" tabindex=\"0\" aria-controls=\"toggle-id-2\">Answer 2<span class=\"toggle_icon\" >        <span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p>        <div id=\"toggle-id-2\" class=\"toggle_wrap \"  >            <div class=\"toggle_content invers-color \"  itemprop=\"text\"   ><p><b>D:<\/b> Glycogen and amylopectin are the only polysaccharide forms that demonstrate branching structure, making them most similar in terms of linkage. Both glycogen and amylopectin use \u03b1-1,4 and \u03b1-1,6 linkages. Cellulose uses \u03b2-1,4 linkages and amylose does not contain \u03b1-1,6 linkages.<\/p>\n            <\/div>        <\/div>    <\/div><\/section>\n<\/div>\n\n\n\t<div   class='av_promobox  avia-button-no   avia-builder-el-4  el_after_av_toggle_container  el_before_av_toggle_container '>\t\t<div class='avia-promocontent'><p>\n<strong>Question 3<\/strong><br \/>\nWhich of the following is correct about fat-soluble vitamins?<br \/>\n<b>I.<\/b> Vitamin E is important for calcium regulation.<br \/>\n<b>II.<\/b> Vitamin D protects against cancer because it is a biological antioxidant.<br \/>\n<b>III<\/b>. Vitamin K is necessary for the posttranslational introduction of calcium-binding sites.<br \/>\n<b>IV.<\/b> Vitamin A is metabolized to retinal, which is important for sight.<br \/>\nA.\u00a0III only<br \/>\nB.\u00a0I and II only<br \/>\nC.\u00a0III and IV only<br \/>\nD.\u00a0II, III, and IV only<\/p>\n<\/div><\/div>\n\n\n<div  class=\"togglecontainer   toggle_close_all  avia-builder-el-5  el_after_av_promobox  el_before_av_promobox \" >\n<section class=\"av_toggle_section\"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\"  >    <div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  >        <p data-fake-id=\"#toggle-id-3\" class=\"toggler \"  itemprop=\"headline\"    role=\"tab\" tabindex=\"0\" aria-controls=\"toggle-id-3\">Answer 3<span class=\"toggle_icon\" >        <span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p>        <div id=\"toggle-id-3\" class=\"toggle_wrap \"  >            <div class=\"toggle_content invers-color \"  itemprop=\"text\"   ><p><b>C:<\/b> Vitamin A is metabolized to retinal, which is important for sight. Vitamin D is metabolized to calcitriol, which is important for calcium regulation. Vitamin E is made up of tocopherols, which are biological antioxidants. Vitamin K is necessary for the introduction of calcium binding sites, such as during the posttranslational modification of prothrombin.<\/p>\n            <\/div>        <\/div>    <\/div><\/section>\n<\/div>\n\n\n\t<div   class='av_promobox  avia-button-no   avia-builder-el-6  el_after_av_toggle_container  el_before_av_toggle_container '>\t\t<div class='avia-promocontent'><p>\n<strong>Question 4<\/strong><br \/>\nTopoisomerases are enzymes involved in:<br \/>\nA.\u00a0DNA replication and transcription.<br \/>\nB.\u00a0posttranscriptional processing.<br \/>\nC.\u00a0RNA synthesis and translation.<br \/>\nD.\u00a0posttranslational processing.<\/p>\n<\/div><\/div>\n\n\n<div  class=\"togglecontainer   toggle_close_all  avia-builder-el-7  el_after_av_promobox  el_before_av_promobox \" >\n<section class=\"av_toggle_section\"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\"  >    <div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  >        <p data-fake-id=\"#toggle-id-4\" class=\"toggler \"  itemprop=\"headline\"    role=\"tab\" tabindex=\"0\" aria-controls=\"toggle-id-4\">Answer 4<span class=\"toggle_icon\" >        <span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p>        <div id=\"toggle-id-4\" class=\"toggle_wrap \"  >            <div class=\"toggle_content invers-color \"  itemprop=\"text\"   ><p><b>A:<\/b> Topoisomerases, such as prokaryotic DNA gyrase, are involved in DNA replication and mRNA synthesis (transcription). DNA gyrase is a type of topoisomerase that enhances the action of helicase enzymes by the introduction of negative supercoils into the DNA molecule. These negative supercoils facilitate DNA replication by keeping the strands separated and untangled.<\/p>\n            <\/div>        <\/div>    <\/div><\/section>\n<\/div>\n\n\n\t<div   class='av_promobox  avia-button-no   avia-builder-el-8  el_after_av_toggle_container  el_before_av_toggle_container '>\t\t<div class='avia-promocontent'><p>\n<strong>Question 5<\/strong><br \/>\nWhich of the following is true of diffusion and osmosis?<br \/>\nA.\u00a0Diffusion and osmosis rely on the electrochemical gradient of only the compound of interest.<br \/>\nB.\u00a0Diffusion and osmosis rely on the electrochemical gradient of all compounds in a cell.<br \/>\nC.\u00a0Diffusion and osmosis will proceed in the same direction if there is only one solute.<br \/>\nD.\u00a0Diffusion and osmosis cannot occur simultaneously.<\/p>\n<\/div><\/div>\n\n\n<div  class=\"togglecontainer   toggle_close_all  avia-builder-el-9  el_after_av_promobox  avia-builder-el-last \" >\n<section class=\"av_toggle_section\"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\"  >    <div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  >        <p data-fake-id=\"#toggle-id-5\" class=\"toggler \"  itemprop=\"headline\"    role=\"tab\" tabindex=\"0\" aria-controls=\"toggle-id-5\">Answer 5<span class=\"toggle_icon\" >        <span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p>        <div id=\"toggle-id-5\" class=\"toggle_wrap \"  >            <div class=\"toggle_content invers-color \"  itemprop=\"text\"   ><p><b>A:<\/b> The movement of any solute or water by diffusion or osmosis is dependent only on the concentration gradient of that molecule and on membrane permeability.<\/p>\n            <\/div>        <\/div>    <\/div><\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Once you&#8217;re familiar with the MCAT Biochemistry section, take this quiz to test your readiness.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[],"_links":{"self":[{"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/posts\/23729"}],"collection":[{"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/comments?post=23729"}],"version-history":[{"count":6,"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/posts\/23729\/revisions"}],"predecessor-version":[{"id":41793,"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/posts\/23729\/revisions\/41793"}],"wp:attachment":[{"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/media?parent=23729"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/categories?post=23729"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/tags?post=23729"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}