Unit 2 Biochemistry Test Retake

Part 1: Matching Write the letter of the description that best matches the term or phrase. Nucleic acid A chain of nucleotides Amino acids Building blocks of proteins Substrate Substance that an enzyme acts on Activation Energy Energy needed to start a reaction Monomer Building blocks of macromolecules Adhesion Attraction between different substances Lipids Organic compound that includes fats Organic Contains Carbon Attraction between substances of the same kind is called Adhesion Cohesion Polarity Gravity Enzyme activity is affected by Temperature pH Substrate concentration All of the above A catalyst (enzyme)... Provides extra energy for a reaction Lowers the activation energy of a reaction Eliminates (to get rid of) the activation energy of a reaction All of the above Without enzymes, the chemical reactions in your body would Happen too fast Occur at the same rate as they do now Require a different pH Occur too slowly to support life processes Which is a macromolecule that consists of fatty acids and glycerol? Lipids Proteins Nucleic Acids Carbohydrates In which of the following organic molecules would you find something that speeds up chemical reactions? Lipids Proteins Nucleic Acids Carbohydrates Carbohydrates... Contain carbon Are composed of monosaccharides Can be used for both energy storage and structural support All of the above Which large biological molecules are used to store energy in living things? Carbohydrates and proteins Carbohydrates and lipids Lipids and proteins Lipids and nucleic acids A stalk of celery is placed in a solution of blue colored dye. After one hour, the leaves have blue fluid in their veins. Which property or properties of water is being demonstrated? Adhesion and cohesion Evaporation and cooling Surface tension High specific heat Water is known as the universal solvent. One reason water makes a good solvent is because it is composed of polar molecules. What makes a water molecule a polar molecule? Water molecules are rod-shaped The water molecule has a negative charge at cold temperatures The water molecule never develops a charge and is always neutral Water molecules have a positive charge on one end and a negative charge on the other Which pair of macromolecule and monomer is INCORRECT? Carbohydrate- monosaccharide Lipid- animal fat DNA- nucleotide Protein- amino acid Vitamin D is an organic moleculethat regulates the absorption of calcium in the body. Which of the following elements is the most common in a molecule of Vitamin D? Aluminum Carbon Magnesium Sodium IN YOUR OWN WORDS: List three properties of water and give an explanation or example for each IN YOUR OWN WORDS: Choose one macromolecule and write a sentence about why it is important to living organisms.