Question 1

Which of the following is a feature shared by both prokaryotic and eukaryotic cells?

Accepted Answer

Presence of ribosomes

Question 2

A scientist discovers a unicellular organism with a cell wall, DNA in a nucleoid region, and no membrane-bound organelles. Which domain does this organism most likely belong to?

Accepted Answer

Bacteria

Question 3

Which of the following best describes the function of the plasma membrane in cells?

Accepted Answer

It acts as a selective barrier, controlling the movement of substances in and out of the cell.

Question 4

Which of the following correctly matches the organelle with its primary function?

Accepted Answer

Golgi apparatus – modification and export of proteins

Question 5

A mutation causes a cell to lose its ability to synthesize lipids and detoxify drugs. Which organelle is most likely affected?

Accepted Answer

Smooth endoplasmic reticulum

Question 6

Which of the following statements about the hierarchical organization of life is correct?

Accepted Answer

Tissues are composed of cells.

Question 7

Which structure is responsible for converting solar energy into chemical energy in plant cells?

Accepted Answer

Chloroplast

Question 8

A cell is observed to have a plasma membrane, cytosol, chromosomes, and ribosomes, but lacks a nucleus and membrane-bound organelles. Which type of cell is this?

Accepted Answer

Prokaryotic cell

Question 9

Which of the following best explains why phospholipids form bilayers in water?

Accepted Answer

Phospholipids are amphipathic, with hydrophilic heads and hydrophobic tails.

Question 10

A patient has a genetic disorder that affects the function of microtubules. Which of the following cellular processes is most likely to be impaired?

Accepted Answer

Movement of chromosomes during cell division

Question 11

Which of the following is NOT a function of membrane proteins?

Accepted Answer

Storing genetic information

Question 12

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

Accepted Answer

Breaking down cellular debris and pathogens

Question 13

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

Accepted Answer

Eukaryotic cells have DNA enclosed in a nucleus.

Question 14

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

Accepted Answer

Plant cell

Question 15

Which of the following best explains why mitochondria are often called the 'powerhouse' of the cell?

Accepted Answer

They convert glucose and oxygen into ATP through cellular respiration.

Question 16

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

Accepted Answer

Providing structural support and enabling cell movement

Question 17

A researcher is studying a cell that divides by binary fission, has a cell wall, and lacks membrane-bound organelles. Which of the following best describes this cell?

Accepted Answer

Prokaryotic cell

Question 18

Which of the following best describes the relationship between the endoplasmic reticulum and the Golgi apparatus?

Accepted Answer

The ER synthesizes proteins and lipids, which are then sent to the Golgi apparatus for modification and sorting.

Question 19

Which of the following is a real-world example of the importance of cell membrane structure in medicine?

Accepted Answer

Antibiotics targeting bacterial cell wall synthesis, causing cell lysis

Question 20

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

Accepted Answer

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

Characteristics of Cells: Unity, Diversity, and Structure in Living Organisms

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