DNA

In the DNA leveled reader, fundamental science concepts in chemistry are explained through easily understood text and colorful illustrations and photographs. Children will learn that DNA stands for deoxyribonucleic acid, which is a polymer made of two long strands wrapped around each other in a double helix shape. A polymer is a long chain of atoms and molecules linked together. DNA is found inside the cells of living things and contains four bases: adenine, thymine, guanine, and cytosine. These bases line up in pairs inside the double helix. The sequences of the bases makes a genetic code that is read by proteins and determines many of the characteristics of a living thing. Each person has a different genetic code, making everyone unique.

A pronunciation guide of scientific terms is included. 24 pages. Reading Level 2-5. Interest Level 2-5. Lexile measure 480L. 395 words.