Nucleic Acids and Protein Synthesis
Our cells and their capabilities are defined by the ( ) which makes up our ( ). The information needed to determine all of our characteristics is found in the ( ) of the nucleotide sequence in the genes. It is a sequence which specifies the exact ( ) sequence found in a protein. Enzymes are an important kind of protein which control all of the chemical reactions of our metabolism.
The total of our genetic makeup is our ( ) , which consists of approximately 30,000 different ( ). It also includes material which determines when proteins are produced, a process known as ( ).
A chromosome consists of two long DNA molecules which are arranged in opposite directions, making them ( ) (See inset at right)
( ) and ( ) form two complementary hydrogen bonds, and ( ) and ( ) form three. It is the hydrogen bonds between the ( ) which holds the two strands together.