Why are strands of dna complementary

Complementary strands Science: molecular biology two single strands of dna in which the nucleotide Sequence is such that they will bind as a result of base pairing throughout their full length. Genes are expressed through the process of protein synthesis. This elaborate tutorial provides an in-depth review of the different steps of the biological production of protein starting from the gene up to the process of secretion.

Also included are topics on DNA replication during interphase of the cell cycle, DNA mutation and repair mechanisms, gene pool, modification, and diseases A mutation is a change in the sequence of the nitrogen bases.

Most of the time when this happens the DNA is able to fix itself and return the original base to the sequence. However, sometimes the repair is unsuccessful, resulting in different proteins being created.

Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:. Skip to main content. Search for:. A pairs with T, and C pairs with G. The color of the rectangle represents the chemical identity of the nitrogenous base.

A grey horizontal cylinder is attached to one end of the rectangle in each nucleotide and represents a sugar molecule. The nucleotides are arranged in two rows and the nitrogenous bases point toward each other. A set of four nucleotides are in both the upper and lower rows. From left to right, the nucleotides in the top row are adenine green , cytosine orange , thymine red , and guanine blue. From left to right, the complementary nucleotides in the bottom row are: thymine red , guanine blue , adenine green , and cytosine orange.

Figure 5: A new DNA strand is synthesized. This strand contains nucleotides that are complementary to those in the template sequence.

How long does replication take? More on replication. How does DNA polymerase work? What does the molecular structure of a nucleotide look like? What does the lagging strand look like? Watch this video for a summary of DNA replication in eukaryotes. Key Questions What if an error happens during replication?

How is DNA stored in the cell before and after replication? What do the leading and lagging strands look like when they are being replicated?

Key Concepts DNA polymerase primer transcription. Topic rooms within Genetics Close. No topic rooms are there. Browse Visually. Other Topic Rooms Genetics. Student Voices. Creature Cast. Simply Science. Green Screen. Green Science. Bio 2.