Which best describes the structure of a dna molecule<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n The structure of a DNA molecule is best described as a double helix<\/strong>.<\/p>\n\n\n\n DNA (deoxyribonucleic acid) is the molecule that carries genetic information in living organisms. Its structure was first described by James Watson and Francis Crick in 1953, with the help of X-ray diffraction data from Rosalind Franklin. The DNA molecule has a unique and intricate structure, often described as a double helix<\/strong>, which resembles a twisted ladder.<\/p>\n\n\n\n The DNA molecule is made up of two strands that run in opposite directions and are twisted around each other. These strands are composed of repeating subunits called nucleotides<\/strong>, each consisting of three components:<\/p>\n\n\n\n The nitrogenous bases are the key to the genetic code and come in four varieties:<\/p>\n\n\n\n The two strands of DNA are held together by hydrogen bonds<\/strong> between complementary nitrogenous bases: adenine pairs with thymine, and cytosine pairs with guanine. This complementary base pairing ensures the accurate transmission of genetic information during cell division.<\/p>\n\n\n\n The strands of DNA run in opposite directions, which is referred to as antiparallel orientation<\/strong>. One strand runs from the 5′ (5-prime) end to the 3′ (3-prime) end, while the other strand runs in the opposite direction, from 3′ to 5′. This orientation is crucial for the proper functioning of enzymes that replicate and transcribe DNA.<\/p>\n\n\n\n The two intertwined strands of DNA form a right-handed double helix, giving the molecule its characteristic twisted structure. This helical shape is stabilized by hydrophobic interactions<\/strong> between the stacked nitrogenous bases inside the helix and hydrogen bonds<\/strong> between the complementary base pairs. The double helix structure of DNA is vital for its ability to store and transmit genetic information in cells.<\/p>\n","protected":false},"excerpt":{"rendered":" Which best describes the structure of a dna molecule The Correct Answer and Explanation is: The structure of a DNA molecule is best described as a double helix. Explanation: DNA (deoxyribonucleic acid) is the molecule that carries genetic information in living organisms. Its structure was first described by James Watson and Francis Crick in 1953, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-168339","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/168339","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=168339"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/168339\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=168339"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=168339"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=168339"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Explanation:<\/h3>\n\n\n\n
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