Biochem Test Corrections

Oil and water will not mix because — both water and oil are polar water is polar and oil is non-polar both water and oil are non-polar water is non-polar and oil is polar What is the strongest acid listed in the figure? hydrochloric acid sulfuric acid pure water sodium hydroxide What is NOT a property of water that helps make water essential for life on Earth? Look for the FALSE answer. Water freezes, floats and insulates aquatic life. Water is able to dissolve non-polar substances such as oil. Water is able to absorb large amounts of heat. Water absorbs heat when it evaporates and helps us cool down. Positive + Negative = ? an electron a non-polar molecule a polar molecule an ionic molecule We are mostly? water sodium chloride carbon dioxide glucose What are the water bonds (gray lines)? non-polar bonding bipolar bonding hydrogen bonding ionic bonding Which statement is true of carbohydrates? Carbohydrates = cell membranes Carbohydrates = energy Carbohydrates = catalyst Carbohydrates = genetic info All of the following are examples of lipids EXCEPT ? (Look for the FALSE answer) fatty acid cellulose oil wax Which pair is wrong? chromosomes — nucleic acids lipids — enzymes carbohydrate — energy amino acids — proteins Molecule X contains chains of amino acids. What is molecule X? protein nucleic acid nucleotide adenine What is an example of a nucleic acid? Collagen DNA A potato oil Which one is a living organism? sample 4 (C, O, Cl, S) sample 1 (C, O, Cl, Ca) sample 2 (C, H, O, N) sample 3 (H, N, Cl, S) What suffix is used in the names of most enzymes? -nic -ase -gen -yme What is true about enzymes? One specific reaction Temperature has no effect pH has no effect Shape can change and it will still function properly What is the optimum temperature for this enzyme’s activity rate? 40 60 30 20 Enzyme A is currently functioning at a temperature of 75°C and a pH of 7. Enzyme A needs to be operating at a pH of 3. What do you do? Increase the temperature to 90°C Increase the pH with the addition of a base Decrease the temperature to 60°C Decrease the pH with the addition of an acid The location on an enzyme where the substrate fits into the enzyme is called the enzyme’s — reaction site receptor site active site inhibitor site An enzyme acts on ? activation energy active site substrate product Smallest to largest? polymer → monomer → macromolecule → carbon atom macromolecule → polymer → monomer → carbon atom carbon atom → monomer → polymer → macromolecule carbon atom → macromolecule → polymer → monomer Enzymes only work with specific substrates because — interference specific ionic bonds has a specific active site destroys its specific enzyme Which monomer is paired with its polymer? Proteins - monosaccharides Lipids - fatty acids Nucleic acids - amino acids Polysaccharides - nucleotides Insulation? carbohydrates lipids proteins nucleic acids Complete the table using the terms given below.A precursor molecule is a monomer. glucose amino acid nucleotide nucleic acid lipid The main source of energy for cells is - fructose maltose sucrose glucose What is Group B? monomers organic molecules macromolecules polymer molecules