{"id":260,"date":"2014-10-16T10:19:15","date_gmt":"2014-10-16T10:19:15","guid":{"rendered":"http:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecbio5u1hwrk\/mcq-1_4d-enzymes-conditions\/"},"modified":"2014-12-04T20:42:33","modified_gmt":"2014-12-04T20:42:33","slug":"mcq-1_4d-enzymes-conditions","status":"publish","type":"page","link":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecbio5u1hwrk\/mcq-1_4d-enzymes-conditions\/","title":{"rendered":"MCQ 1_5B Enzymes Conditions"},"content":{"rendered":"

Marking Guide<\/a><\/p>\n\n\n\n\n\n\n\n
1.<\/span><\/em><\/td>\nOne of the properties of enzymes in the initiation of chemical reactions is that an enzyme<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\ndoes not alter the energy input required<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nraises the energy input required<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\nlowers the energy input required<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nraises then lowers the energy input<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
2.<\/span><\/em><\/td>\nWhich term refers to the process by which complex molecules are formed from simple molecules?<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nDigestion<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nSynthesis<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\nDegradation<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nRespiration<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
3.<\/span><\/em><\/td>\nThe substrate for phosphorylase is<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nglucose<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nglucose-1-phosphate<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\nphosphate<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nstarch<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
4.<\/span><\/em><\/td>\nSome synthesis reactions build storage molecules. Such molecules will be<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nused to build the body of the organism<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nused immediately for energy<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\nbroken down again when they are needed<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nkept until it is convenient to remove them from the organism<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
5.<\/span><\/em><\/td>\nSome synthesis reactions build structural molecules. Such molecules will be<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nused to build the body of the organism<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nused immediately for energy<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\nbroken down again when they are needed<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nkept until it is convenient to remove them from the organism<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
6.<\/span><\/em><\/td>\nAs the temperature is raised from 10\u00b0C to 60\u00b0C the activity of an enzyme<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nincreases then decreases<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nincreases<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\ndecreases<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\ndecreases then increases<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
7.<\/span><\/em><\/td>\nFor an enzyme, the optimum temperature is<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nthe hottest temperature at which it can work<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nthe temperature at which it works fastest<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\nthe coldest temperature at which it can work<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nany temperature at which it can work<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
8.<\/span><\/em><\/td>\nWhat is the optimum temperature for human enzymes? <\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\n25\u00b0C<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\n37\u00b0C<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\n40\u00b0C<\/span><\/td>\n<\/tr>\n
\u00a0<\/td>\nD.<\/span><\/td>\n60\u00b0C<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
9.<\/span><\/em><\/td>\nWhat happens when an enzyme is heated strongly?<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nit changes colour<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nit acts faster<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\nit is neutralised<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nits structure changes<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
10.<\/span><\/em><\/td>\nWhen an enzyme is heated to 60\u00b0C it is denatured. This means that it will<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nnever work again<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nonly work when cooled to 37\u00b0C<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\npermanently work faster<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nnow be at its optimum temperature<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
11.<\/span><\/em><\/td>\nIf an enzyme is denatured it means that<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nit acts faster on substrates<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nits active site is altered in shape<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\nthe substrate fits the active site better<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nit continues working<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
12.<\/span><\/em><\/td>\nThe pH scale measures<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nenzyme activity<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nglucose production<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\ndigestive system temperature<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nacidity or alkalinity<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
13.<\/span><\/em><\/td>\nIn an experiment it was found that an enzyme worked well at pH 4, but not at pH 7 or pH 11 Which of the following is a valid conclusion?<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\npH 7 is the optimum for this enzyme<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nthe enzyme works best in acidic conditions<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\nthe enzyme works best in alkaline conitions<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nthe enzyme works best in neutral conditions<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
14.<\/span><\/em><\/td>\nWhat is the optimum pH for pepsin?<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\naround pH 2<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\naround pH 4<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\naround pH 7<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\naround pH 9<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
15.<\/span><\/em><\/td>\nMost cellular activities are processes regulated by the action of \u2014<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nDNA<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nenzymes<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\nphospholipids<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nproteins<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nE.<\/span><\/td>\nmRNA<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
16.<\/span><\/em><\/td>\nThis graph shows that \u2014<\/span><\/p>\n\n\n\n\n\n\n\n
\"\"<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nmore enzymes are present at a higher pH<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\npepsin is less sensitive to pH than trypsin<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\npepsin is less effective at low pH than trypsin<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\npH affects the activity rate of enzymes<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
17.<\/span><\/em><\/td>\nThis graph shows that \u2014<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nmore enzymes are present at a higher pH<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\npepsin is less sensitive to pH than trypsin<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\npepsin is less effective at low pH than trypsin<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\npH affects the activity rate of enzymes<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
18.<\/span><\/em><\/td>\nThe molecule represented below is found in living things. Which statement describes one characteristic of this molecule?<\/span><\/p>\n\n\n\n\n\n\n\n
\"\"<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nIt is the template for the replication of genetic information<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nEnzymes are made up of these molecules<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\nIt is different in each cell of an organism<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nCell membranes contain many of these molecules<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
19.<\/span><\/em><\/td>\nWhich model best represents the relationship between a cell, a nucleus, a gene, and a chromosome?<\/span><\/p>\n\n<\/tbody>\n<\/table>\n<\/td>\n<\/tr>\n\n\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\n\"\"<\/a><\/span><\/td>\n\"\"<\/a><\/td>\nB.<\/span><\/td>\n\"\"<\/a><\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\n\"\"<\/a><\/span><\/td>\n\"\"<\/a><\/td>\nD.<\/span><\/td>\n\"\"<\/a><\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n
\u00a0<\/td>\n<\/tr>\n
20.<\/span><\/em><\/td>\nThe diagram below represents a chemical reaction that occurs in the human body. Which statement describes a characteristic of molecule Z?<\/span><\/p>\n\n\n\n\n\n\n\n
\"\"<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nA.<\/span><\/td>\nMolecule Z will function at any temperature above 20\u00b0C.<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nB.<\/span><\/td>\nMolecule Z is composed of a string of molecular bases represented by A, T, G, and C.<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nC.<\/span><\/td>\nMolecule Z will function best at a specific pH.<\/span><\/td>\n<\/tr>\n
\"\"<\/a><\/td>\nD.<\/span><\/td>\nfertilize the eggs in sea water that does not contain radioactive thymine<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Marking Guide 1. One of the properties of enzymes in the initiation of chemical reactions is that an enzyme A. does not alter the energy input required B. raises the energy input required C. lowers the energy input required D. raises then lowers the energy input \u00a0 2. Which term refers to the process by … Continue reading “MCQ 1_5B Enzymes Conditions”<\/span><\/a><\/p>\n","protected":false},"author":2454,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-260","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecbio5u1hwrk\/wp-json\/wp\/v2\/pages\/260","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecbio5u1hwrk\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecbio5u1hwrk\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecbio5u1hwrk\/wp-json\/wp\/v2\/users\/2454"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecbio5u1hwrk\/wp-json\/wp\/v2\/comments?post=260"}],"version-history":[{"count":12,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecbio5u1hwrk\/wp-json\/wp\/v2\/pages\/260\/revisions"}],"predecessor-version":[{"id":528,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecbio5u1hwrk\/wp-json\/wp\/v2\/pages\/260\/revisions\/528"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecbio5u1hwrk\/wp-json\/wp\/v2\/media?parent=260"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}