WebA DNA strand has a phosphate at the 5' end and a hydroxyl group at the 3' end. The two strands in a DNA molecule have the same 5' to 3' orientation. Complementary DNA strands are held together by hydrogen bonds between the bases. A DNA nucleotide consists of the sugar ribose, a phosphate, and a nitrogeneous base. Flag question: Question 15 WebJames Watson and Francis Crick proposed that the DNA is made up of two strands that are twisted around each other to form a right-handed helix, called a double helix. Purines and pyramidines form base-pairs through hydrogen bonding which keep the two DNA stands stable. However, the nucleotides form base pairs with a specific partner.

DNA Replication Lesson.pptx - Intro Video Link:... - Course Hero

WebOpen the DNA structure file, 1NAJ.cn3. 2. Open the Style menu. Choose Rendering Shortcuts > Ball and Stick. 3. Look in the Sequence/Alignment Viewer window and select a "g", … WebDNA consists of two antiparallel strands of nucleotides held together by a. peptide bond b. covalent bond c. ionic bond d. hydrogen bonds d. hydrogen bonds The method of DNA … fit and gap 分析

9.1 The Structure of DNA – Concepts of Biology – 1st …

WebIn its natural state, each DNA molecule is actually composed of two single strands held together along their length with hydrogen bonds between the bases. Watson and Crick … WebSep 24, 2024 · The strands are held together by hydrogen bonds between bases on complementary strands. Hence like proteins, DNA has secondary structure but in this case, the hydrogen bonds are not within the backbone but between the "side chain" bases on opposing strands. WebThe two strands go in opposite directions, with the nitrogen-containing bases facing inward to make the steps or rungs of the staircase and the sugar-phosphate backbone making up the outside walls of the helix. The hydrogen bonds between the nitrogen bases keep the two strands of DNA together and help keep the DNA molecule stable and whole. can felimazole be crushed