Question 1

Which of the following best describes the function of the plasma membrane in a eukaryotic cell?

Accepted Answer

It acts as a fragile, transparent barrier that separates the cell contents from the surrounding environment and regulates the movement of substances in and out of the cell.

Question 2

According to the Fluid Mosaic Model, which of the following statements is TRUE about the plasma membrane?

Accepted Answer

Proteins and other molecules float and move freely within the lipid bilayer, creating a dynamic and constantly changing arrangement.

Question 3

A cell is observed to have abundant rough endoplasmic reticulum (ER). Which function is this cell MOST likely specialized for?

Accepted Answer

Synthesis and export of proteins

Question 4

Which organelle is known as the 'powerhouse' of the cell and is responsible for producing the majority of ATP?

Accepted Answer

Mitochondrion

Question 5

A scientist discovers a cell with many lysosomes. What is the most likely function of this cell?

Accepted Answer

Cellular digestion and breakdown of waste materials

Question 6

Which of the following cell junctions would you expect to find in tissues that require impermeable barriers, such as the lining of the intestines?

Accepted Answer

Tight junctions

Question 7

If a mutation caused a cell to lack cholesterol in its plasma membrane, which of the following would MOST likely occur?

Accepted Answer

The membrane would become less stable and more fluid, potentially compromising its integrity.

Question 8

Which of the following best describes the role of the Golgi apparatus in a cell?

Accepted Answer

It packages, modifies, and sorts proteins for transport to their final destinations.

Question 9

A cell is observed to have a large number of peroxisomes. Which function is this cell MOST likely specialized for?

Accepted Answer

Detoxification of harmful substances such as alcohol and hydrogen peroxide

Question 10

Which of the following structures is responsible for the movement of substances between adjacent cells, especially in the heart and embryonic cells?

Accepted Answer

Gap junctions

Question 11

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

Accepted Answer

Nucleus

Question 12

A cell is observed to have a highly developed smooth endoplasmic reticulum. Which function is this cell MOST likely specialized for?

Accepted Answer

Detoxification of drugs and synthesis of lipids

Question 13

Which of the following best explains the principle of complementarity in cell theory?

Accepted Answer

Cell activities are dictated by their structure, which determines their function.

Question 14

Which of the following equations correctly represents the process of ATP production in mitochondria?

Accepted Answer

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

Question 15

Which of the following is the correct sequence for the synthesis and export of a protein in a cell?

Accepted Answer

Ribosome → Rough ER → Golgi apparatus → Plasma membrane

Question 16

Which of the following best describes the function of desmosomes?

Accepted Answer

They anchor adjacent cells together, providing mechanical strength.

Question 17

Which of the following is a function of the nucleolus?

Accepted Answer

It synthesizes ribosomal RNA and assembles ribosomes.

Question 18

A cell is observed to have a large number of glycocalyx glycoproteins. What is the most likely function of these glycoproteins?

Accepted Answer

They act as cellular 'glue,' helping bind cells together.

Question 19

Which of the following statements about organelles is TRUE?

Accepted Answer

Each type of organelle is specialized to carry out a specific function for the cell.

Question 20

Which of the following best describes the role of chromatin in the cell?

Accepted Answer

It is a network of DNA and proteins that condenses to form chromosomes during cell division.

Cells and Tissues: Structure and Function in Anatomy & Physiology

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