DNA secondary structure is a right-handed double helix with a sugar phosphate backbone on the outside and paired bases (A-T, G-C) on the inside. Which of the following are true?
举一反三
- The description of the secondary structure of DNA double helix are correct, EXCEPT
- The backbone of a DNA molecule is<br/>_________.() A: made up of sugars alone B: made up of nitrogenous bases alone C: made up of phosphate groups alone D: made up of alternating phosphate and<br/>sugar groups
- The backbone of a DNA molecule is: ( ) A: made up of sugars B: made up of nitrogenous bases C: made up of phosphate groups D: made up of alternating phosphate and sugar groups E: made up of alternating sugars and nitrogenous base
- which are the main form of secondary structure of protein ( ) A: supercoil B: β-pleated sheet C: β-turn D: random coil E: double helix
- Which structure is not secondary structure of the protein？（） A: α-helix B: β- fold C: β- Angle D: subunits