Biomolecules and Cell Energy

Which statements best compare the function of an ATP molecule to a DNA molecule?

• ATP carries and transmits the genetic information of organisms.

• ATP provides energy for chemical reactions in the cell. DNA carries and transmits the genetic information of organisms.

• ATP serves as a biological catalyst that speeds up the rate of chemical reactions. DNA acts as a strucrural sugar in the cell walls of plants.

• ATP acts as a structural sugar in the cell walls of plants.

A student makes a Venn diagram to compare the functions of carbohydrates and lipids.

Which function of carbohydrates and lipids should be placed in the shared section of the Venn diagram?

• Hormone production

• Structural support of cell walls

• Energy storage

• Catalyst for chemical reactions

Which graphic organizer best compares the energy inputs and outputs of cellular respiration and photosynthesis?

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For an enzyme to be able to catalyyze a reaction, the active site must-

• be occupied by an inhibitor

• increase the activation energy level

• have a complementary shape to the substrate

• cause the enzyme to be destroyed in the reaction

Which statement accurately describes the energy needs for photosynthesis and cellular respiration?

• Solar energy is needed for cellular respiration but not for photosynthesis.

• Chemical energy in the form of glucose is needed for both cellular respiration and photosynthesis.

• Chemical energy in the form of glucose is needed for photosynthesis, and solar energy is needed for cellular respiration.

• Solar energy is needed for photosynthesis, and chemical energy in the form of glucose is needed for cellular respiration.

Which statement explains how producers are dependent upon consumers for their survival ?

• Consumers supply oxygen for producers to undergo aerobic respiration.

• Consumers produce carbon dioxide for producers to use during photosynthesis.

• Consumers provide chemical energy needed by producers for cellular respiration.

• Consumers make lactic acid that producers use in photosynthesis.

Photosynthesis and cellular respiration both involve the use and release of gases. Which statement correctly identifies the role of gases in the two processes?

• Photosynthesis and cellular respiration both use carbon dioxide and release oxygen.

• Photosynthesis and cellular respiration both use oxygen and release carbon dioxide.

• Cellular respiration uses oxygen and releases carbon dioxide, while photosynthesis uses carbon dioxide and releases oxygen.

• Cellular respiration uses carbon dioxide and releases oxygen, while photosynthesis uses oxygen and releases carbon dioxide.

Enzymes are proteins that have a three-dimensional shape that is specific to a particular substrate. environmental conditions can change the shape of the protein.

What is the most likely result if the shape of the enzyme changes?

• The substrate will change its shape to match the enzyme.

• The enzyme will no longer be able to catalyze the reaction with the substrate.

• The products made from the enzyme and the substrate will be changed

• The enzyme will be able to bind to more diverse substrates than before.

The graphs show the reaction rate for an enzyme across a range of temperatures and pH.

Based on this data, this enzyme functions best at what temperature and pH?

The diagram represents one way an enzyme can be inhibited.

Which statement explains the effect of an inhibitor on an enzyme?

• A substrate will be able to bond with the enzyme.

• The enzyme will likely be attacked by immune cells.

• The enzyme will be unable to produce more enzymes.

• A substrate will be unable to attach to the enzyme.