{"id":21980,"date":"2025-06-16T08:25:57","date_gmt":"2025-06-16T08:25:57","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=21980"},"modified":"2025-06-16T08:25:59","modified_gmt":"2025-06-16T08:25:59","slug":"wild-type-neurospora-crassais-auxotrophic-with-respect-to-the-vitamin-__","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/wild-type-neurospora-crassais-auxotrophic-with-respect-to-the-vitamin-__\/","title":{"rendered":"Wild-type Neurospora crassais auxotrophic with respect to the vitamin __"},"content":{"rendered":"\n<p>Wild-type Neurospora crassais auxotrophic with respect to the vitamin __________, which therefore must be supplied by its environment. histidine arginine riboflavin ribonucleic acids biotin<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><strong>The correct answer and explanation is:<\/strong><\/mark><\/p>\n\n\n\n<p><strong>Correct Answer: biotin<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Explanation (300 words):<\/strong><\/h3>\n\n\n\n<p><strong>Neurospora crassa<\/strong> is a type of red bread mold that has been a model organism in genetics and molecular biology, particularly for studying gene function and metabolic pathways. A strain is considered <em>wild-type<\/em> if it represents the typical form found in nature, possessing the standard genetic makeup without mutations.<\/p>\n\n\n\n<p>Interestingly, even the wild-type strain of <em>Neurospora crassa<\/em> displays <strong>auxotrophy<\/strong> for <strong>biotin<\/strong>. Auxotrophy means the organism cannot synthesize a specific compound essential for its growth and must obtain it from the environment. So, although it is considered \u201cwild-type,\u201d <em>N. crassa<\/em> still cannot produce biotin on its own and requires it to be present in its growth medium.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why <strong>biotin<\/strong>?<\/h3>\n\n\n\n<p>Biotin is a B-vitamin (also known as vitamin B7 or vitamin H) that plays a crucial role as a coenzyme in various metabolic reactions, particularly in <strong>carboxylation<\/strong> reactions involving fatty acid synthesis and amino acid metabolism. <em>N. crassa<\/em> lacks the full biochemical machinery necessary to synthesize biotin from scratch.<\/p>\n\n\n\n<p>This dependency on biotin has made <em>N. crassa<\/em> very useful in early studies of metabolic pathways and genetic mutations. Researchers used it in experiments to determine how specific genes are responsible for individual enzymatic steps\u2014pioneering the \u201cone gene\u2013one enzyme\u201d hypothesis.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What about the other options?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Histidine<\/strong> and <strong>arginine<\/strong> are amino acids. Mutant <em>Neurospora<\/em> strains can be auxotrophic for these, but not the wild-type.<\/li>\n\n\n\n<li><strong>Riboflavin<\/strong> (vitamin B2) and <strong>ribonucleic acids<\/strong> (RNA) are also essential molecules, but wild-type <em>N. crassa<\/em> can typically synthesize them without external supplementation.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Summary:<\/h3>\n\n\n\n<p>The wild-type strain of <em>Neurospora crassa<\/em> is auxotrophic for <strong>biotin<\/strong>, which must be supplied by the environment for normal growth. This characteristic has been central to its use in genetics research.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.numerade.com\/ask\/question\/wild-type-neurospora-crassais-auxotrophic-with-respect-to-the-vitamin-__________-which-therefore-must-be-supplied-by-its-environment-histidine-arginine-riboflavin-ribonucleic-acids-biotin-06355\/\" target=\"_blank\" rel=\"noopener\"><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Wild-type Neurospora crassais auxotrophic with respect to the vitamin __________, which therefore must be supplied by its environment. histidine arginine riboflavin ribonucleic acids biotin The correct answer and explanation is: Correct Answer: biotin Explanation (300 words): Neurospora crassa is a type of red bread mold that has been a model organism in genetics and molecular [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-21980","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/21980","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=21980"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/21980\/revisions"}],"predecessor-version":[{"id":21981,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/21980\/revisions\/21981"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=21980"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=21980"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=21980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}