Corrections for Biomolecules and Enzymes Exam 2021

The video tutorial covers test corrections, focusing on biomolecules for energy, complex carbohydrates, enzyme functions, and cell membrane molecules. It explains the role of enzymes in digestion and protein synthesis, the impact of pH on enzyme activity, and the function of proteins in cell membranes. The tutorial aims to help students understand these concepts to improve their quiz performance and recover points.

What is the maximum percentage of points you can earn back for a missed question after watching the video?

• 25%

• 75%

• 100%

• 50%

Which biomolecule provides the most calories per gram?

• Carbohydrates

• Nucleic acids

• Proteins

• Lipids

Which nutrition label is best for a snack that provides quick energy with few calories?

• 140 calories, 4g fat, 22g carbs, 5g protein

• 180 calories, 8g fat, 13g carbs, 15g protein

• 975 calories, 50g fat, 100g carbs, 25g protein

• 20 calories, 0g fat, 0g carbs, 5g protein

What determines the function of complex carbohydrates?

• The type of chemical elements

• The structure of the glucose subunits

• The number of glucose molecules

• The presence of proteins

Which of the following is NOT a function of carbohydrates?

• Storing genetic information

• Forming cell walls in plants

• Storing energy in plants

• Providing quick energy

What is the role of DNA in enzyme synthesis?

• It transports enzymes to their site of action

• It contains the instructions for building enzymes

• It acts as a catalyst

• It provides the energy for synthesis

What type of biomolecule is lactose?

• Nucleic acid

• Protein

• Lipid

• Carbohydrate

What is the effect of an enzyme inhibitor?

• It changes the shape of the enzyme's active site

• It increases the enzyme's affinity for the substrate

• It has no effect on the enzyme

• It speeds up the reaction

What happens to enzyme activity at a pH of 2?

• It decreases slightly

• It is denatured and stops working

• It remains the same

• It increases

What is the function of proteins in the cell membrane?

• To facilitate the movement of particles across the membrane

• To act as enzymes

• To provide structural support

• To store energy