What are the rails and rungs of DNA?

What are the rails and rungs of DNA?

The rails of the DNA strand are made up of deoxyribose (a sugar) and phosphoric acid. These two molecules alternate one after the other the entire length of the rail. The rungs of the DNA strand are made up of organic bases. These organic bases attach to the deoxyribose on the ladder rails.

What makes the rungs or step of the DNA molecules?

In between the two sides of this sugar-phosphate backbone are four nitrogenous bases: adenine (A), thymine (T), cytosine (C), and guanine (G). These bases make up the ‘rungs’ of the ladder, and are attached to the backbone where the deoxyribose (sugar) molecules are located.

How are the rungs of the DNA ladder made?

To make the rungs of the ladder, two bases join together, between the sugar molecules on the two handrails. The phosphate molecules do not have any “rungs” between them. THERE IS ONLY ONE WAY THE BASES CAN PAIR UP ON THE RUNGS OF THE DNA LADDER. An adenine molecule only pairs with a thymine.

How are phosphate molecules pair up on the DNA ladder?

The phosphate molecules do not have any “rungs” between them. THERE IS ONLY ONE WAY THE BASES CAN PAIR UP ON THE RUNGS OF THE DNA LADDER. An adenine molecule only pairs with a thymine. A cytosine only pairs with a guanine.

How did Watson and Crick discover the structure of DNA?

a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine). Using research from many sources, including chemically accurate models, Watson and Crick discovered how these six subunits were arranged to make the the structure of DNA. The model is called a double

How is RNA transcribed into the double helix?

The messenger RNA molecule is then translated to produce proteins. In order for DNA transcription to take place, the DNA double helix must unwind and allow an enzyme called RNA polymerase to transcribe the DNA. RNA is also a nucleic acid, but contains the base uracil instead of thymine.