Organic Molecules Quiz

Biomolecules and Reactions

• Inorganic molecules are not normally found in living things.
• Endergonic reactions require an input of energy.
• Exergonic reactions release energy.

Carbohydrate Tests

• Benedict's reagent turns blue-green when monosaccharides are present.
• The purpose of Sudan IV in the Sudan IV test for lipids is to stain lipids.

Protein Structure and Function

• Monomers of proteins are called amino acids.
• Amino acids are held together in proteins by peptide bonds.
• The Biuret reagent turns purple after reacting with peptide bonds.
• There are 20 different amino acids found in living things.

Cell Biology

• The purpose of the Dische Diphenylamine Test is to detect the presence of DNA.
• Escherichia coli belongs to the domain Bacteria.
• The main function of the pseudopodia in Amoeba is to capture food and move around.
• Eudorina belongs to the kingdom Protista.
• The function of the flagellum in Eudorina is to move around.
• Elodea belongs to the domain Eukarya.
• The main function of the central vacuole in Elodea is to store water and maintain turgor pressure.
• Solanum sp. (Potato) belongs to the kingdom Plantae.
• The main function of amyloplasts in Solanum sp. (Potato) cells is to store starch.
• Cell walls and cell membranes were visible in the Onion peel cells under the microscope.
• Saccharomyces sp. (Yeast) belongs to the kingdom Fungi.

Enzymes

• Enzymes are highly specific to their substrates.
• The primary structure of a protein is its sequence of amino acids.
• Hydrogen bonds in proteins are weak and contribute to the protein's 3D structure.
• The active site of an enzyme is the region where the substrate binds.
• During induced fit, the enzyme's active site changes shape to fit the substrate.
• Only small amounts of enzymes are needed in reactions because they are highly efficient.
• The reaction rate of an enzyme is affected by factors such as temperature, pH, and substrate concentration.
• Enzyme activity decreases at temperatures lower than the optimum.
• Enzyme activity often increases at temperatures higher than the optimum, but can eventually denature the enzyme.
• Temperature affects enzyme activity by altering the protein's shape and active site.