{"id":1966,"date":"2020-07-16T09:41:35","date_gmt":"2020-07-16T09:41:35","guid":{"rendered":"https:\/\/murreeroad.org\/Biology10\/?p=1966"},"modified":"2020-07-16T09:41:35","modified_gmt":"2020-07-16T09:41:35","slug":"q-3-describe-structure-of-dna-q-3-describe-structure-of-dna","status":"publish","type":"post","link":"https:\/\/murreeroad.org\/Biology10\/q-3-describe-structure-of-dna-q-3-describe-structure-of-dna\/","title":{"rendered":"Q.3 Describe structure of DNA.Q.3 Describe structure of DNA."},"content":{"rendered":"<p><strong>Q.3\u00a0Describe structure of DNA.<\/strong><br \/>\n<strong>Answer:<\/strong><br \/>\n<strong>James Watson and Francis Crick <\/strong><br \/>\nIn 1953, James Watson and Francis Crick proposed structure for DNA.<br \/>\n<strong>Double Helix <\/strong><br \/>\nAccording to Watson-Crick model, a DNA molecule consists of two polynucleotide strands which are coiled around each other in the form of double helix.<br \/>\nSugar-phosphate Backbone<br \/>\nThere is phosphate-sugar backbone on the outside of double helix.<br \/>\n<strong>Nitrogenous Bases <\/strong><br \/>\nNitrogenous Bases are present on the inside of double helix.<br \/>\n<strong>Base Pairing<\/strong><br \/>\nIn double helix, the nitrogenous bases of opposite nucleotides form pairs through hydrogen bonds.<br \/>\n<img loading=\"lazy\" class=\"size-full wp-image-1967 aligncenter\" src=\"https:\/\/murreeroad.org\/Biology10\/wp-content\/uploads\/2020\/07\/Base-Pairing.jpg\" alt=\"Base Pairing\" width=\"274\" height=\"289\" \/><br \/>\n<strong>Specificity in Base pairing <\/strong><br \/>\nPairing is very specific. The nitrogenous base Adenine of one nucleotide forms pair with Thymine of opposing nucleotide while Cytosine forms pair with Guanine.<br \/>\n<strong>Hydrogen Bonding <\/strong><br \/>\nThere are two hydrogen bonds between Adenine and Thymine while there are three hydrogen bonds between Cytocine and Guanine.<br \/>\n<a href=\"https:\/\/murreeroad.org\/Biology10\/unit-15-inheritance-long-questions\/\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-1462 aligncenter\" src=\"https:\/\/murreeroad.org\/Biology10\/wp-content\/uploads\/2020\/06\/back_button.png\" alt=\"\" width=\"150\" height=\"45\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Q.3\u00a0Describe structure of DNA. Answer: James Watson and Francis Crick In 1953, James Watson and Francis Crick proposed structure for DNA. Double Helix According to Watson-Crick model, a DNA molecule consists of two polynucleotide strands which are coiled around each other in the form of double helix. Sugar-phosphate Backbone There is phosphate-sugar backbone on the&hellip;&nbsp;<a href=\"https:\/\/murreeroad.org\/Biology10\/q-3-describe-structure-of-dna-q-3-describe-structure-of-dna\/\" class=\"\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">Q.3 Describe structure of DNA.Q.3 Describe structure of DNA.<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26],"tags":[],"_links":{"self":[{"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/posts\/1966"}],"collection":[{"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/comments?post=1966"}],"version-history":[{"count":1,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/posts\/1966\/revisions"}],"predecessor-version":[{"id":1968,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/posts\/1966\/revisions\/1968"}],"wp:attachment":[{"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/media?parent=1966"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/categories?post=1966"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/tags?post=1966"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}