Exam 3: The Chemistry of Organic Molecules

A polypeptide has an amino acid sequence of: alanine-leucine-tryptophane-glycien-valine-alanine. This chain of amino acids is further organized into a helix that in-turn,folds in and around itself to form a globular structure.The primary structure of this polypeptide is:

A dehydration reaction can also be called a (an)_________ reaction since it forms water.

If an animal needed to store energy for long-term use,but not be encumbered with the weight of extra tissue,which is the best molecule for storage?

Which carbohydrate is used in the liver for energy storage?

Which statement is true about RNA?

Identify the following molecule:

Which functional group will attach to a hydrocarbon chain to form alcohol?

A peptide bond is found in which type of biological molecule?

Choose the Figure that depicts polymer synthesis.

Which of the following functional groups represents sulfhydryl?

Which of the following is NOT a protein function?

Organic molecules are those that contain at least

A hydrocarbon is hydrophobic

Due to an increased risk of heart disease many doctors have suggested shifting our diet to include more oils instead of fats.As you cook dinner tonight the recipe calls for 2 tbs of oil.What is the most likely source of the oil you used in preparing your meal?

Which Figure is that of an unsaturated fat?

How many molecules of water are used to degrade this polypeptide,using hydrolysis reactions,into its constituent amino acids: alanine-leucine-tryptophane-glycine-valine-alanine?

Migratory birds store energy as glycogen which is lighter than fat.

Which carbohydrate is found in the cell walls of plants?

Starch is a protein that serves in energy storage in plant cells.

Glucose (C₆H₁₂O₆)can exist as both an open-chain form and a closed-ring form.Before 1900,glucose was only thought to occur as an open chain.Now we know that over 99 percent of the time,glucose occurs in the closed-ring form.What possible difference between these forms would give chemists a clue that the open-chain form was not present?