Q: Which of the following equations correctly represents the hydrolysis of ATP?

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{ADP} + \mathrm{P}_i + \text{energy}$$

Question 1

Which of the following best describes the emergent properties of water that are critical for life on Earth?

Accepted Answer

Water's high specific heat, cohesion, adhesion, and ability to act as a solvent for polar molecules.

Question 2

A scientist is studying a membrane composed of phospholipids with saturated fatty acid side-chains. What effect would increasing the proportion of unsaturated fatty acids have on the membrane?

Accepted Answer

It would increase membrane fluidity by introducing kinks that prevent tight packing.

Question 3

Which equation correctly represents the conversion of micrometers to nanometers?

Accepted Answer

$$1 \, \mathrm{\mu m} = 10^3$ \, \mathrm{nm}$$

Question 4

Which of the following statements about positive and negative controls in an experiment is correct?

Accepted Answer

A positive control is used to ensure the experimental setup can produce a known result, while a negative control is used to ensure no confounding factors produce a false positive.

Question 5

Which of the following best explains why enzymes are sensitive to changes in pH?

Accepted Answer

Changes in pH can disrupt hydrogen and ionic bonds, affecting the enzyme's tertiary structure and active site.

Question 6

Which of the following is a correct comparison between mitochondria and lysosomes?

Accepted Answer

Mitochondria are involved in energy production via cellular respiration, while lysosomes are involved in the breakdown of macromolecules.

Question 7

Which of the following macromolecules is NOT a polymer?

Accepted Answer

Phospholipid

Question 8

A cell is placed in a hypertonic solution. What will happen to the cell?

Accepted Answer

Water will leave the cell, causing it to shrink.

Question 9

Which of the following best describes the fluid mosaic model of the plasma membrane?

Accepted Answer

A dynamic structure where proteins and lipids move laterally within a bilayer of phospholipids.

Question 10

Which of the following equations correctly represents the hydrolysis of ATP?

Accepted Answer

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} ightarrow \mathrm{ADP} + \mathrm{P}_i + 	ext{energy}$$

Question 11

Which of the following statements about competitive and allosteric inhibition is correct?

Accepted Answer

Competitive inhibitors bind to the active site, while allosteric inhibitors bind to a different site and change enzyme shape.

Question 12

Which of the following is the main source of energy for cellular work in most organisms?

Accepted Answer

ATP hydrolysis

Question 13

Which of the following statements about the sodium-potassium pump is correct?

Accepted Answer

It uses ATP to move sodium out of the cell and potassium into the cell against their concentration gradients.

Question 14

Which of the following is a correct description of the role of NAD+ in cellular respiration?

Accepted Answer

NAD+ is an electron carrier that accepts electrons during glycolysis and the Krebs cycle.

Question 15

Which of the following best explains why cells have organelles?

Accepted Answer

Organelles allow for compartmentalization of different biochemical processes, increasing efficiency.

Question 16

Which of the following is a correct statement about the difference between potential and kinetic energy?

Accepted Answer

Potential energy is stored energy due to position or structure, while kinetic energy is energy of motion.

Question 17

Which of the following is a correct application of the second law of thermodynamics to biological systems?

Accepted Answer

Biological systems require a constant input of energy to maintain order and decrease entropy locally.

Question 18

Which of the following statements about signal transduction is correct?

Accepted Answer

Signal transduction is the process by which a cell converts an extracellular signal into a specific cellular response.

Question 19

Which of the following is a correct description of homeostasis?

Accepted Answer

Homeostasis is the maintenance of a stable internal environment despite changes in external conditions.

General Biology Study Guide: Cells, Membranes, Metabolism, and Cellular Respiration

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