BiologyWise
Biology Wise: Nucleoside vs. Nucleotide
Discusses the characteristics of and differences between nucleosides and nucleotides as well as the significance of each in medicine.
BiologyWise
Biology Wise: Purines and Pyrimidines
Purines and pyrimidines are nucleotides. Their properties are described here and their differences are highlighted. Includes examples of each.
BiologyWise
Biology Wise: Start Codon
A start codon is a nucleotide triplet in a genetic sequence that occurs at the start of a protein's synthesis. Read about how this works and how a mutation can sometimes occur.
McGraw Hill
The Mc Graw Hill Companies, Inc.: Rna
This brief site provides a comparison of DNA and RNA along with a brief explanation of the role of RNA within the cell.
Ducksters
Ducksters: Biology for Kids: Chromosomes
Explore the topics of chromosomes in the science of biology including what they do, DNA, alleles, genes, proteins and human chromosomes on this site.