"A molecule of DNA consists of two chains, strands composed of a large number of chemical compounds, called nucleotides, linked together to form a chain. These chains are arranged like a ladder that has been twisted into the shape of a winding staircase, called a double helix. Each nucleotide consists of three units: a sugar molecule called deoxyribose, a phosphate group, and one of four different nitrogen-containing compounds called bases. The four bases are adenine (A), guanine (G), thymine (T), and cytosine (C). The deoxyribose molecule occupies the center position in the nucleotide, flanked by a phosphate group on one side and a base on the other. The phosphate group of each nucleotide is also linked to the deoxyribose of the adjacent nucleotide in the chain. These linked deoxyribose-phosphate subunits form the parallel side rails of the ladder. The bases face inward toward each other, forming the rungs of the ladder."
"A DNA molecule consists of a ladder, formed of sugars and
phosphates, and four nucleotide bases: adenine (A), thymine (T), cytosine (C),
and guanine (G). The genetic code is specified by the order of the nucleotide
bases, and each gene possesses a unique sequence of base pairs. Scientists use
these base sequences to locate the position of genes on chromosomes and to
construct a map of the entire human genome."
Microsoft ® Encarta ® Reference Library 2005. © 1993-2004 Microsoft Corporation.
All rights reserved.
Flash MX 2004
Minimum Screen Resolution: 1024 x 768
Level: Beginner
File: dna-replication-exercise.fla
Prerequisite: Tsunami Animation and Humoral Immune Response
Prerequisite: Tsunami Animation
1- Explore the different symbols in the library.
2- Study the timeline above.
3- Build the animation.
4- You may refer to the final .fla file for help.
Good Luck!