G Chapter 1 - Chapter 1 1.1 DNA The Fundamental Information...

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Chapter 1 1.1 DNA: The Fundamental Information Molecule of Life DNA stores biological information in units known as nucleotides Each DNA molecule consists of four letters G (guanine), C (cytosine), A (adenine) & T (thymine) These are the components of the nucleotide building blocks of DNA DNA molecule is a double strand of nucleotides carry complementary G-C or A-T base pairs They bind through hydrogen bonds Genes – DNA regions that encode proteins Chromosomes – organized structures containing DNA and proteins that package and manage the storage, duplication, and evolution of DNA 1.2 Proteins: The Functional Molecules of Life Processes Animals swim, fly, walk or run while plants grow toward or away from light Living organisms use sources of energy and matter to grow Metabolism – chemical and physical reactions that carry out these conversions Proteins – large polymers composed of a thousand amino acid subunits in a long chain Ex: Hemoglobin – the structure and shape allows it to transport oxygen to the bloodstream and
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