Q: Which of the following equations correctly represents the overall process of cellular respiration?

$$\mathrm{C_6H_{12}O_6$} + 6\ \mathrm{O_2$} \rightarrow 6\ \mathrm{CO_2$} + 6\ \mathrm{H_2O} + \text{energy}$$

Question 1

Which of the following best describes the main structural difference between prokaryotic and eukaryotic cells?

Accepted Answer

Prokaryotic cells lack a nucleus, while eukaryotic cells have a membrane-bound nucleus.

Question 2

During glycolysis, what is the net gain of ATP molecules produced per molecule of glucose?

Accepted Answer

$$2$$

Question 3

Which organelle is primarily responsible for the synthesis of ATP in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 4

A scientist is studying a cell that contains both chloroplasts and mitochondria. Which type of cell is she most likely observing?

Accepted Answer

A plant cell

Question 5

Which of the following equations correctly represents the overall process of cellular respiration?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\ \mathrm{O_2$} ightarrow 6\ \mathrm{CO_2$} + 6\ \mathrm{H_2O} + 	ext{energy}$$

Question 6

Which of the following best explains why ATP is considered the 'energy currency' of the cell?

Accepted Answer

ATP stores energy in its phosphate bonds, which can be released to drive cellular processes.

Question 7

A mutation causes a cell to lack functional lysosomes. Which process would be most directly affected?

Accepted Answer

Digestion of macromolecules within the cell

Question 8

Which of the following statements about enzymes is correct?

Accepted Answer

Enzymes lower the activation energy of chemical reactions, increasing the reaction rate.

Question 9

In the electron transport chain of cellular respiration, what is the final electron acceptor?

Accepted Answer

Oxygen ($$\mathrm{O_2$})$$

Question 10

Which of the following best describes the function of the endomembrane system in eukaryotic cells?

Accepted Answer

It manufactures, ships, and recycles cargo within the cell.

Question 11

A patient is diagnosed with a mitochondrial disorder that impairs the electron transport chain. Which symptom is most likely to result from this condition?

Accepted Answer

Reduced cellular ATP production

Question 12

Which of the following is a product of fermentation in human muscle cells under anaerobic conditions?

Accepted Answer

Lactate

Question 13

During photosynthesis, which molecule acts as the initial electron donor in the light-dependent reactions?

Accepted Answer

Water ($$\mathrm{H_2O})$$

Question 14

Which of the following best describes the role of the cytoskeleton in eukaryotic cells?

Accepted Answer

It provides structural support, enables cell movement, and organizes organelles.

Question 15

A cell is observed to have a high number of ribosomes attached to its endoplasmic reticulum. What is the most likely function of this cell?

Accepted Answer

Producing large amounts of proteins for export

Question 16

Which of the following best explains why fermentation is less efficient than aerobic respiration?

Accepted Answer

Fermentation produces less ATP per glucose molecule because it does not use the electron transport chain.

Question 17

Which phase of the cell cycle is primarily responsible for DNA replication?

Accepted Answer

S phase

Question 18

A researcher adds a competitive inhibitor to an enzyme-catalyzed reaction. What is the most likely effect on the reaction rate?

Accepted Answer

The reaction rate will decrease because the inhibitor competes with the substrate for the active site.

Question 19

Which of the following is a key function of the Golgi apparatus in eukaryotic cells?

Accepted Answer

Modifying, sorting, and packaging proteins for secretion or delivery to other organelles

Question 20

Which of the following best describes the relationship between the structure and function of biological membranes?

Accepted Answer

The phospholipid bilayer provides a semi-permeable barrier that regulates the movement of substances into and out of the cell.

General Biology Study Guide: Cells, Energy, and Metabolism (Chapters 7-9)

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