Unit 2 and more Exam

Enzymes are made from which major biomolecule?

• proteins
• carbohydrates
• Lipids
• nucleic acids

What is the major function of all enzymes?

• to build or breakdown substrates
• to just build-up substrates
• to just break down substrates
• to make products

Which of the following molecules is considered an enzyme

• ligase
• lactose
• sucrose
• fructose

Which of the following conclusions can be drawn from this graph?

• The optimum pH of the enzyme is 6.6
• The enzyme's activity increases as the pH increases from 5 to 9
• The optimum pH of the enzyme is 5.8
• The enzymes activity is greater around 8.2 pH

Based on the graph, at what temperature does the enzyme work best at?

• 40
• 60
• 20
• 30

Enzymes speed up reactions within the human body by...

• Forming new cells
• Lowering the activation energy
• Presenting new genetic information
• Providing quick energy for cells

Which of the following best describes the role of enzymes in living organisms?

• Enzymes provide energy for cells.
• Enzymes speed up the rate of chemical reactions in cells.
• Enzymes are structural components of cell membranes.
• Enzymes provide insulation for the body.

Oils, fats and waxes are forms of which of the following molecules?

• Lipids
• Carbohydrates
• Nucleic Acids
• Proteins

Which of the following molecules is NOT a monomer?

• amino acids
• lipids
• carbohydrates
• nucleotides

Proteins are polymers formed from...

• Amino acids
• Nucleic Acids
• Monosacharrides
• Fatty Acids