Virtual Experiments Procedure A. lodine Test for the Presence of Starch 1. Gather the following food samples: potato, rice, sugar cubes, salt 2. Using a clean dropper, add 1-3 drops of iodine solution to the food samples to test for the presence of starch. Record the result of video experiment. Interpret as POSSITIVE or NEGTIVE for the presence of macromolecules. A. lodine test for Starch Potato Rice Food Sample Sugar cubes Salt Color Reaction Interpretation 1. What causes the changes in the color of iodine when dropped with different food samples? Explain.
Nucleotides
It is an organic molecule made up of three basic components- a nitrogenous base, phosphate,and pentose sugar. The nucleotides are important for metabolic reactions andthe formation of DNA (deoxyribonucleic acid) and RNA (ribonucleic acid).
Nucleic Acids
Nucleic acids are essential biomolecules present in prokaryotic and eukaryotic cells and viruses. They carry the genetic information for the synthesis of proteins and cellular replication. The nucleic acids are of two types: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The structure of all proteins and ultimately every biomolecule and cellular component is a product of information encoded in the sequence of nucleic acids. Parts of a DNA molecule containing the information needed to synthesize a protein or an RNA are genes. Nucleic acids can store and transmit genetic information from one generation to the next, fundamental to any life form.
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