Question 1

Which of the following structures is found in both prokaryotic and eukaryotic cells and is directly involved in protein synthesis?

Accepted Answer

Ribosome

Question 2

A scientist observes a cell with a plasma membrane, cell wall, nucleoid region, and ribosomes, but no membrane-bound organelles. What type of cell is this most likely to be?

Accepted Answer

Bacterial cell

Question 3

Which organelle is responsible for modifying, sorting, and shipping proteins to their final destinations in a eukaryotic cell?

Accepted Answer

Golgi apparatus

Question 4

The smooth endoplasmic reticulum (ER) is involved in several cellular processes. Which of the following is NOT a function of the smooth ER?

Accepted Answer

Protein glycosylation

Question 5

A mutation disrupts the function of motor proteins in a neuron. Which cellular process would be most directly affected?

Accepted Answer

Vesicle transport along microtubules

Question 6

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

Accepted Answer

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

Question 7

Which of the following cell junctions prevents the leakage of extracellular fluid across a layer of epithelial cells?

Accepted Answer

Tight junction

Question 8

A plant cell is placed in a hypotonic solution. Which organelle helps prevent the cell from bursting?

Accepted Answer

Cell wall

Question 9

Which structure is unique to plant cells and allows for the direct exchange of materials between adjacent cells?

Accepted Answer

Plasmodesmata

Question 10

During autophagy, which organelle is responsible for breaking down damaged organelles within the cell?

Accepted Answer

Lysosome

Question 11

Which of the following best explains the endosymbiotic theory for the origin of mitochondria and chloroplasts?

Accepted Answer

They originated from engulfed prokaryotic cells

Question 12

Which cytoskeletal element is primarily responsible for maintaining cell shape and resisting tension?

Accepted Answer

Intermediate filaments

Question 13

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

Accepted Answer

Protein secretion

Question 14

Which of the following is a function of peroxisomes in eukaryotic cells?

Accepted Answer

Breakdown of fatty acids and detoxification of hydrogen peroxide

Question 15

Which of the following best describes the structure of the plasma membrane?

Accepted Answer

A phospholipid bilayer with embedded proteins

Question 16

Which equation represents the synthesis of a peptide bond during protein formation?

Accepted Answer

$$Amino\ $$acid_1$$ + Amino\ $$acid_2$$ \rightarrow Dipeptide + H_2O$$

Question 17

A cell is unable to produce ATP efficiently due to a defect in the cristae. Which organelle is most likely affected?

Accepted Answer

Mitochondrion

Question 18

Which of the following statements about the nucleolus is correct?

Accepted Answer

It is the site of ribosomal RNA synthesis

Question 19

Which of the following is NOT a component of the cytoskeleton?

Accepted Answer

Plasmodesmata

Question 20

A cell is observed to have a large central vacuole, cell wall, and chloroplasts. Which type of cell is this most likely to be?

Accepted Answer

Plant cell

A Tour of the Cell: Structure and Function

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