DNA
DNA is a code inside every cell that tells a living thing how to grow.
A recipe card holds all the steps for baking a cake. Every cell in your body holds a long, coiled strand called DNA. That strand is a set of steps that tells your body what to build. Just as one recipe card can guide many bakers, one copy of DNA guides every cell in your body.
Explaining dna by grade level
Every living thing is made of tiny cells. Inside each cell is a code called DNA. This code tells your body how to grow. It tells your eyes what color to be. You got your DNA from your mom and dad.
Projects that explore dna
DNA carries instructions as genes, and scientists can move those instructions between organisms. A plasmid — a small ring of DNA — carries two genes at once: one for antibiotic resistance and one for producing a fluorescent protein. When bacteria receive this foreign DNA, they gain both traits, proving that DNA functions as a transferable code.
Every onion cell holds a complete copy of the code that tells the plant how to grow. That code is tightly packed inside the cell, hidden behind membranes and wrapped in proteins. Detergent breaks open those membranes, and meat tenderizer removes the proteins. Cold ethanol then pulls the DNA out of solution as a white, stringy mass you can lift with a glass rod.