Spiral Review: Biomolecules & Homeostasis

(Q2,5C) Which question would help define the problem of molecule movement through a semi-permeable membrane?

• How much energy is required for passive transport?

• Which molecules move freely through the membrane?

• What kind of membrane proteins are involved in osmosis?

• What concentration gradient is necessary for diffusion?

(Q3, 5C) What calculation would best help you determine if active transport is occurring in the cell?

• The difference in molecule size before and after transport

• The number of molecules moving from low to high concentration

• The number of molecules moving from high to low concentration

• The volume of the cell membrane involved in transport

(Q3,5C) What evidence best supports the explanation that molecules are moving by passive transport?

• No energy is used during the transport process.

• The spheres move from an area of low concentration to high concentration.

• ATP is consumed to move the spheres against the gradient.

• The spheres are selectively transported using a carrier protein.

(Q3,5C) Which observation best supports the claim that active transport is happening in the diagram?

• Molecules are evenly distributed on both sides of the membrane.

• The molecules diffuse freely across the membrane without energy.

• The process requires ATP to move molecules from low to high concentration.

• Water molecules move to equalize concentration on both sides.

(Q8,5C) What would happen to a cell if the membrane stopped regulating the balance of nutrients and waste?

• The cell would gain energy and grow larger.

• The cell would have nutrient deficiencies and waste build-up.

• The cell would continue to function normally.

• The cell would store all its waste for future use.

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(Q5,5A) How do lipids conserve heat in animal tissues?

• By acting as an energy source

• By providing insulation

• By breaking down carbohydrates

• By creating proteins

(Q7,5A) When reading a test question, the biomolecule "protein" can be substituted for the term (a)   .

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(Q7,5A) If you were to graph a reaction with an enzyme versus one without, which feature would you expect to be different?

• The amount of energy required for both reactions would be the same.

• The reaction without the enzyme would start faster.

• The graph of the reaction with the enzyme would show a lower activation energy peak.

• The graph with the enzyme would have a higher curve for the energy used.

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(Q9,5A) How do I know that glucose can provide energy?

• Glucose is a nucleic acid, and nucleic acids help the cell produce energy.

• Glucose is a lipid, and lipids provide quick energy during exercise.

• Glucose is a protein, and proteins store energy for long-term use.

• Glucose is a carbohydrate, and carbohydrates are the main source of energy for cells.

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(Q16,5A) How can I identify a protein in a cell membrane diagram?

• The protein will have no opening and will block all substances from passing.

• The protein will be a square outside of the membrane.

• The protein will be a circle with an opening, allowing substances to pass through it.

• The protein will look like a straight line across the membrane.