Q: Which equation correctly represents the process of cellular respiration occurring in mitochondria?

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

Question 1

Which of the following best explains why eukaryotic cells can compartmentalize their functions more efficiently than prokaryotic cells?

Accepted Answer

Eukaryotic cells contain internal membranes that create specialized organelles.

Question 2

A scientist discovers a cell with the following characteristics: DNA in a circular molecule, no membrane-bound organelles, and a cell wall. Which type of cell is this most likely to be?

Accepted Answer

Prokaryotic cell

Question 3

Which organelle is primarily responsible for synthesizing ATP through cellular respiration in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 4

The endosymbiosis theory is supported by which of the following pieces of evidence regarding mitochondria and chloroplasts?

Accepted Answer

They contain circular DNA and 70S ribosomes similar to prokaryotes.

Question 5

Which of the following best describes the function of the Golgi apparatus in a eukaryotic cell?

Accepted Answer

It modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles.

Question 6

A mutation prevents the formation of lysosomes in a cell. Which of the following consequences is most likely?

Accepted Answer

Cellular waste will accumulate, potentially leading to toxicity.

Question 7

Which of the following organelles is directly involved in the synthesis of proteins destined for secretion from the cell?

Accepted Answer

Rough endoplasmic reticulum

Question 8

A plant cell is placed in a hypotonic solution. Which organelle helps the cell maintain its rigidity by storing water and pushing against the cell wall?

Accepted Answer

Vacuole

Question 9

Which of the following is NOT a function of the cytoskeleton in eukaryotic cells?

Accepted Answer

Synthesizing proteins

Question 10

During muscle contraction, which cytoskeletal element is most directly involved?

Accepted Answer

Microfilaments (actin)

Question 11

Which of the following best describes the role of integrins in animal cells?

Accepted Answer

They link the extracellular matrix to the cytoskeleton, facilitating communication and adhesion.

Question 12

If a cell's plasma membrane loses its selective permeability, which of the following is most likely to occur?

Accepted Answer

Uncontrolled movement of substances in and out of the cell, potentially leading to cell death.

Question 13

Which equation correctly represents the process of cellular respiration occurring in mitochondria?

Accepted Answer

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

Question 14

Which of the following structures is found in plant cells but NOT in animal cells?

Accepted Answer

Chloroplasts

Question 15

A cell is observed to have a large number of ribosomes attached to its rough ER. What is the most likely function of this cell?

Accepted Answer

Secretion of large amounts of protein

Question 16

Which of the following statements about the nucleolus is correct?

Accepted Answer

It assembles ribosomal subunits by synthesizing rRNA and combining it with proteins.

Question 17

Which process is described by a cell engulfing a smaller microorganism and digesting it using lysosomes?

Accepted Answer

Phagocytosis

Question 18

Which of the following best describes the function of the extracellular matrix (ECM) in animal cells?

Accepted Answer

It holds cells together, regulates adhesion, migration, and communication.

Question 19

Which cytoskeletal element is most important for chromosome movement during cell division?

Accepted Answer

Microtubules

Question 20

A cell is unable to produce fibronectin. Which of the following cellular processes would be most directly affected?

Accepted Answer

Attachment of the cell membrane to the extracellular matrix

A Tour of the Cell: Structure and Function of Cellular Components

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