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As we have studied the 4 major biomolecules, we have paid close attention to the structures, functions, and examples of each and how they contribute to the health of organisms. In your answer, provide one major function and at least one example of each of the 4 biomolecules (carbohydrates, lipids, proteins, and nucleic acids). Provide your answer in complete sentences. 

Which of the following effects is produced by the high surface tension of water? A) Lakes don’t freeze solid in winter despite low temperatures. B) A water strider can walk across the surface of a small pond. C) Organisms resist temperature changes, although they give off heat due to chemical reactions. D) Evaporation of sweat from the skin helps to keep people from overheating.  

Which of the following represents correctly paired DNA nucleotides? A) Adenine with Thymine B) Adenine with Guanine C) Cytosine with Thymine D) Cytosine with Adenine

You are conducting an experiment to determine the effect of varying levels of caffeine on high school swimmers. You will be varying the amounts of caffeine consumed by each swimmer 1 hour before swimming a 200 meter race. You have already recorded times for each swimmer at a normal practice, without the use of caffeine supplements for comparison to your results.               Use the information provided to correctly match the variables for this experiment.     

You are conducting an experiment to answer the question: How does temperature affect the mass of water? Which of the following would be an appropriate controlled variable for this experiment?

Which of the following properties of water is directly related to water’s ability to form weak hydrogen bonds with other water molecules? A) Property of expansion upon freezing B) Property of cohesion C) Property of water as a universal solvent D) Property of water as a regulator of temperature

Which of the following best summarizes the relationship between dehydration reactions and hydrolysis? A) Dehydration reactions split water molecules and add hydroxyl groups to polymers, and hydrolysis reactions remove hydroxyl groups from polymers. B) Dehydration reactions assemble polymers, and hydrolysis reactions break down polymers. C) Dehydration reactions create monomers, and hydrolysis reactions assemble polymers. D) Dehydration reactions break down polymers, and hydrolysis reactions create monomers.

Which bonds are created during the formation of the primary structure of a protein? A) disulfide bonds B) hydrogen bonds C) phosphodiester bonds D) peptide bonds

Which of the following is not one of the observations made by Charles Darwin as he developed his theory of natural selection and the evolution of organisms?  

Humans produce sweat as a cooling mechanism to maintain a stable internal temperature. Which of the following best explains how the properties of water contribute to this physiological process? A) The high specific heat capacity of water allows the body to absorb a large amount of excess heat energy. B) The high heat of vaporization of water allows the body to remove excess heat through a phase change of water from liquid to gas. C) The high surface tension of water contributes to the physical process by which water leaves the body. D) The high melting temperature of water allows the body to remove excess heat through a phase change of water from solid to liquid.