Question 1

Which of the following statements best explains why eukaryotic cells can be much larger than prokaryotic cells?

Accepted Answer

Eukaryotic cells have a cytoskeleton and membrane-bound organelles that compartmentalize functions, allowing for increased size and complexity.

Question 2

A scientist discovers a unicellular organism with a nucleoid region, ribosomes, and a cell wall, but no membrane-bound organelles. Which type of cell is this organism most likely to have?

Accepted Answer

Prokaryotic cell

Question 3

Which organelle is responsible for modifying, sorting, and packaging proteins for secretion or delivery to other organelles?

Accepted Answer

Golgi complex

Question 4

A mutation prevents the formation of nuclear pores in a eukaryotic cell. Which process would be directly affected?

Accepted Answer

Transport of mRNA from the nucleus to the cytoplasm

Question 5

Which of the following best describes the main function of the smooth endoplasmic reticulum (SER)?

Accepted Answer

Lipid synthesis

Question 6

Which of the following equations correctly represents the overall process of cellular respiration that occurs in mitochondria?

Accepted Answer

$$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\ \mathrm{O}_2 ightarrow 6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} + 	ext{ATP}$$

Question 7

Which structure in plant cells is primarily responsible for storing water, pigments, and metabolic wastes, and also provides mechanical strength?

Accepted Answer

Central vacuole

Question 8

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

Accepted Answer

Active protein secretion

Question 9

Which of the following is a key difference between prokaryotic and eukaryotic flagella?

Accepted Answer

Prokaryotic flagella operate like propellers, while eukaryotic flagella have a whip-like motion and are made of microtubules.

Question 10

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

Accepted Answer

It provides mechanical strength, shape, and facilitates movement and transport within the cell.

Question 11

A mutation in a plant cell prevents the formation of thylakoid membranes. Which process would be most directly affected?

Accepted Answer

The first step of photosynthesis (light-dependent reactions)

Question 12

Which of the following best explains why mitochondria and chloroplasts are believed to have originated from bacteria?

Accepted Answer

They contain their own DNA and ribosomes, similar to bacteria.

Question 13

Which of the following is the correct sequence for the pathway of a protein that is to be secreted from a eukaryotic cell?

Accepted Answer

Rough ER → Golgi complex → Transport vesicle → Plasma membrane

Question 14

Which of the following best describes the function of lysosomes in animal cells?

Accepted Answer

Digestion of worn-out cell parts and invading microbes

Question 15

Which of the following is a function of the nuclear envelope in eukaryotic cells?

Accepted Answer

It separates the nuclear contents from the cytoplasm and regulates passage of materials via nuclear pores.

Question 16

Which of the following best describes the relationship between chromatin and chromosomes?

Accepted Answer

Chromatin is DNA wrapped around proteins, which can be further packaged into chromosomes.

Question 17

Which of the following processes occurs in the stroma of the chloroplast?

Accepted Answer

The second step of photosynthesis (Calvin cycle)

Question 18

A cell is unable to produce glycoproteins. Which organelle is most likely malfunctioning?

Accepted Answer

Rough endoplasmic reticulum

Question 19

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

Accepted Answer

Synthesizing DNA

Question 20

Which of the following best describes the main function of ribosomes?

Accepted Answer

Joining amino acids together to make polypeptides (proteins)

Organization of the Cell: Structure and Function of Prokaryotic and Eukaryotic Cells

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