DNA Worksheet Essay

Describe the structure of DNA. DNA is thread formed by two strands, related together to form a double helix.

The double helix looks like a twisted ladder. The sides of this ladder are long unites called nucleotides and are made of three parts; a nitrogenous base, a sugar, and a phosphate group. The sides of the ladder or the nucleotides from the two separate strands of the DNA are attached by an appendage made of one of four separate bases. These appendages represent the rungs of the DNA ladder and are attached to the complimentary strand of the DNA.The bases or rungs are made of either Adenine (A) OR Thymine (T) or Cytosine (C) and Guanine (G).

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The attachment of the strands by the bases is specific Adenine can only join with Thymine, and Cytosine can only join with Guanine. Since this base pairing is specific, if one knows the sequence of bases a long one strand of the DNA one will also know the strand of the DNA one will also know the sequence along the complimentary strand. How does an organism’s genotype determine its phenotype? The phenotype is an organism in a class to which that organism belongs as determined by the description of the physical and behavioral.

Because of the Characteristics of the organism for example the size and shape, its metabolic activities, and it’s, pattern of movement. Physical traits arise from the action of a wide variety of proteins. For example structural protein helps make up the body of an organism, and enzymes, catalyze and metabolic activities. The genotype is a class to which that organisms belong as determine by the description of the actual physical material made-up of DNA that was passed to the organism by its parents at the organism conception.An organism genotype is its genetic makeup is the sequence; of nucleotide determine its phenotype can be seen in eye color. Describe each stage of the flow of information starting with DNA and ending with a trait. Polymers such as DNA and RNA are carry information that is passed from generation to generation. They contain a great amount of linked nucleotides made of sugar, a phosphate and a base.

An array of nucleotides in DNA duplicate into a nucleus. Before being translated the RNA navigates its way to the cytoplasm.From the cytoplasm, it is converted into the specific amino acid sequence of a protein. Once the protein has been correctly assembled and folded it can go to work. In the example of the red- color trait, this protein is in the form of an enzyme catalyst, that enhances and speeds up the chemical reaction producing the red up the red pigment. As the protein goes to work the trait is produced.

In the example, the trait is the red color seen in the petals of the flower.


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