Question 1

Which of the following best explains why eukaryotic cells can carry out more specialized functions than prokaryotic cells?

Accepted Answer

Eukaryotic cells contain membrane-bound organelles that compartmentalize cellular processes.

Question 2

A scientist is studying a bacterial cell and observes that it contains a structure composed of peptidoglycan. What is the primary function of this structure?

Accepted Answer

To protect the cell and maintain its shape

Question 3

Which of the following statements about the endomembrane system is correct?

Accepted Answer

It is involved in the production, processing, and transport of proteins and lipids.

Question 4

A mutation prevents the addition of the mannose-6-phosphate tag to a protein in the Golgi apparatus. What is the most likely consequence?

Accepted Answer

The protein will be secreted from the cell instead of being delivered to the lysosome.

Question 5

Which experimental approach would best test whether a specific amino acid sequence is a nuclear export signal in a plant protein?

Accepted Answer

Mutate the sequence and observe whether the protein accumulates in the nucleus.

Question 6

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

Accepted Answer

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

Question 7

A cell is observed to have a large number of mitochondria. Which of the following is the most likely function of this cell?

Accepted Answer

Active transport of ions requiring high ATP production

Question 8

Which process is responsible for the recycling of damaged organelles within a eukaryotic cell?

Accepted Answer

Autophagy

Question 9

A protein is synthesized in the cytosol and contains a nuclear localization signal (NLS). What is the fate of this protein?

Accepted Answer

It will be imported into the nucleus through the nuclear pore complex.

Question 10

Which of the following best explains the movement of vesicles from the rough endoplasmic reticulum to the Golgi apparatus?

Accepted Answer

Vesicles move along microtubules using the motor protein kinesin.

Question 11

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

Accepted Answer

Prokaryotic flagella move by rotating, while eukaryotic flagella move by whipping back and forth.

Question 12

Which of the following best describes the function of peroxisomes in eukaryotic cells?

Accepted Answer

They are the site of reduction–oxidation (redox) reactions and detoxification of hydrogen peroxide.

Question 13

A mutation disrupts the function of dynein in a eukaryotic cell. Which cellular process would be most directly affected?

Accepted Answer

Bending movement of cilia and flagella

Question 14

Which of the following is a function of the smooth endoplasmic reticulum (SER)?

Accepted Answer

Synthesis and breakdown of lipids

Question 15

Which of the following best describes the process of glycosylation?

Accepted Answer

Addition of carbohydrate groups to proteins in the ER lumen

Question 16

A cell is observed to have a large central vacuole filled with pigments. This cell is most likely from which type of organism and tissue?

Accepted Answer

Plant petal tissue

Question 17

Which of the following statements about the endosymbiosis theory is correct?

Accepted Answer

It proposes that mitochondria and chloroplasts originated as free-living bacteria engulfed by ancestral eukaryotes.

Question 18

Which cytoskeletal element is primarily responsible for separating chromosomes during mitosis and meiosis?

Accepted Answer

Microtubules

Question 19

A cell is unable to synthesize the signal recognition particle (SRP). Which process would be most directly affected?

Accepted Answer

Targeting of proteins to the rough endoplasmic reticulum

Question 20

Which of the following best describes the role of the nuclear lamina?

Accepted Answer

It provides structural support to the nucleus and anchors chromosomes.

Inside the Cell: Structure and Function of Cellular Components

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