DNA Structure, Function & Protein Synthesis by

What is DNA?

schwyhartshelby — 2025-04-29 15:06:50 UTC

DNA or Deoxyribonucleic acid contains instructions for making proteins that your body needs. It maintains the shape of a double helix.

Parts of the DNA Ladder

schwyhartshelby — 2025-04-29 15:06:50 UTC

The sides of the ladder are made of sugar (deoxyribose) and phosphate molecules. The rungs of the ladder are made of pairs of chemicals called bases. There are four bases in DNA: Adenine (A), Thymine (T), Guanine (G), and Cytosine (C). These bases are a code that spells out instructions for your body.

The Base Pairing Rules

schwyhartshelby — 2025-04-29 15:06:51 UTC

DNA bases follow special pairing rules - Adenine (A) always pairs with Thymine (T), and Guanine (G) always pairs with Cytosine (C). This is called base pairing. Remember: A=T and G=C. These pairs are held together by chemical bonds that look like tiny magnets holding the ladder rungs together.

Why Base Pairing Matters

schwyhartshelby — 2025-04-29 15:06:52 UTC

Base pairing is super important! When cells divide, the DNA ladder splits down the middle. Each side then builds a new partner side using these base pairing rules. This is how your DNA can copy itself perfectly, making sure each new cell gets the right instructions.

From DNA to Proteins: Step 2 - Translation

schwyhartshelby — 2025-04-29 15:06:53 UTC

After transcription comes translation. This is when the RNA code is read to build proteins. Special cellular machines called ribosomes read the RNA code three letters at a time and link together amino acids in the right order to make proteins. It's like following the recipe step by step to make the final product!

Transcription

schwyhartshelby — 2025-04-30 11:22:38 UTC

The first step of gene expression where DNA is used as a template to create messenger RNA (mRNA). This occurs in the cell nucleus.

Codon

schwyhartshelby — 2025-04-30 11:23:02 UTC

A sequence of three nucleotides in mRNA that specifies a particular amino acid or signals the start/stop of protein synthesis.

Protein Synthesis

schwyhartshelby — 2025-04-30 11:23:31 UTC

The entire process of creating proteins using genetic information, including both transcription and translation steps.