Table of Contents
- 1 What happens when a DNA molecule splits?
- 2 What two molecules make up the sides of the ladder in a DNA molecule?
- 3 When a DNA molecule unzips to form two strands What is added to each strand?
- 4 What are the steps of the DNA ladder made of?
- 5 Which step follows the assembly of new DNA strands by DNA polymerase?
What happens when a DNA molecule splits?
During separation, the two strands of the DNA double helix uncoil at a specific location called the origin. Several enzymes and proteins then work together to prepare, or prime, the strands for duplication. Finally, a special enzyme called DNA polymerase organizes the assembly of the new DNA strands.
What splits the DNA ladder in half?
Helicase is a group of enzyme that helps unwounds DNA by breaking hydrogen bonds between the nitrogenous bases.
What two molecules make up the sides of the ladder in a DNA molecule?
The sides of the ladder are made of alternating sugar and phosphate molecules. The sugar is deoxyribose. The rungs of the ladder are pairs of 4 types of nitrogen bases. Two of the bases are purines- adenine and guanine.
What is the process when DNA splits into two strands?
Since DNA contains the genetic material for an organism, it is important that it be copied when a cell divides into daughter cells. The process that copies DNA is called replication. Replication involves the production of identical helices of DNA from one double-stranded molecule of DNA.
When a DNA molecule unzips to form two strands What is added to each strand?
DNA replication occurs through the help of several enzymes. These enzymes “unzip” DNA molecules by breaking the hydrogen bonds that hold the two strands together. Each strand then serves as a template for a new complementary strand to be created. Complementary bases attach to one another (A-T and C-G).
What makes the rungs of the ladder in DNA?
They showed that alternating deoxyribose and phosphate molecules form the twisted uprights of the DNA ladder. The rungs of the ladder are formed by complementary pairs of nitrogen bases — A always paired with T and G always paired with C.
What are the steps of the DNA ladder made of?
The inside of the molecule, the “steps” of the staircase, are made of the nucleotide bases Cytosine, Guanine, Adenine, and Thymine. C bonds to G by three hydrogen bonds. A bonds to T by two hydrogen bonds.
What parts of the nucleotide make up the sides of the ladder?
The phosphate and deoxyribose molecules form the sides of the DNA ladder while nitrogenous bases form the rungs.
Which step follows the assembly of new DNA strands by DNA polymerase?
Question: Which step follows the assembly of new DNA strands by DNA polymerase? Primers base-pair with the exposed single DNA strands. Enzymes unwind and separate the two strands of DNA. Repair enzymes correct potential mutations in the DNA sequence.