Question 1

Which statement best summarizes the cell theory as established by Schwann, Schleiden, and Virchow?

Accepted Answer

All living organisms are made of cells, and all cells arise from preexisting cells.

Question 2

Which of the following is NOT a component found in all cells?

Accepted Answer

Mitochondria

Question 3

A scientist wants to observe the fine details of the internal structure of a mitochondrion. Which type of microscope should they use?

Accepted Answer

Transmission electron microscope (TEM)

Question 4

Which feature distinguishes eukaryotic cells from prokaryotic cells?

Accepted Answer

Presence of membrane-bound organelles

Question 5

Bacterial cell walls are primarily composed of which molecule?

Accepted Answer

Peptidoglycan

Question 6

Which organelle is responsible for the synthesis and processing of proteins that are to be secreted from the cell?

Accepted Answer

Rough endoplasmic reticulum

Question 7

A plant cell is placed in a hypertonic solution. What is the most likely effect on its central vacuole?

Accepted Answer

The vacuole will lose water and shrink.

Question 8

Which of the following best explains why prokaryotic cells are generally smaller than eukaryotic cells?

Accepted Answer

A higher surface area-to-volume ratio facilitates efficient transport of materials.

Question 9

Which organelle is the site of most cellular ATP production in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 10

Which structure in prokaryotic cells is responsible for attachment to surfaces and other cells?

Accepted Answer

Fimbriae

Question 11

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

Accepted Answer

It is responsible for producing, processing, and transporting proteins, carbohydrates, and lipids.

Question 12

Which organelle contains enzymes that detoxify hydrogen peroxide in eukaryotic cells?

Accepted Answer

Peroxisome

Question 13

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

Accepted Answer

Providing shape and structural stability

Question 14

Which organelle is found in plant cells but not in animal cells and is responsible for photosynthesis?

Accepted Answer

Chloroplast

Question 15

Which of the following best describes the function of the Golgi apparatus?

Accepted Answer

It processes, sorts, and ships proteins and lipids.

Question 16

Which of the following is true about mitochondria and chloroplasts?

Accepted Answer

They both contain their own DNA and ribosomes.

Question 17

A mutation prevents the formation of acid hydrolases in a cell. Which organelle's function would be most directly affected?

Accepted Answer

Lysosome

Question 18

Which of the following is a major advantage of compartmentalization in eukaryotic cells?

Accepted Answer

It separates incompatible chemical reactions and increases efficiency.

Question 19

Which of the following statements about ribosomes is correct?

Accepted Answer

They are the site of protein synthesis.

Question 20

According to the endosymbiosis theory, which statement is true about the origin of mitochondria and chloroplasts?

Accepted Answer

They were once free-living bacteria engulfed by ancestral eukaryotic cells.

Cell Structure: The Fundamental Units of Life (General Biology 1, Module 4)

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