Question 1

Which of the following structures is found in all types of cells (prokaryotic and eukaryotic)?

Accepted Answer

Plasma membrane

Question 2

A scientist discovers a cell with a capsule and a nucleoid region but no membrane-bound organelles. Which type of cell is this most likely to be?

Accepted Answer

Prokaryotic cell

Question 3

Which organelle is responsible for the synthesis of proteins that are exported out of the cell?

Accepted Answer

Rough endoplasmic reticulum

Question 4

What is the primary function of the nucleolus within the nucleus?

Accepted Answer

Ribosome assembly

Question 5

Which of the following is a feature unique to plant cells and not found in animal cells?

Accepted Answer

Central vacuole

Question 6

A mutation disrupts the nuclear lamina in a cell. Which of the following cellular processes would most likely be affected?

Accepted Answer

Mechanical support of the nuclear envelope

Question 7

Which equation best represents the surface area to volume ratio ($SA:V$) for a spherical cell of radius $r$?

Accepted Answer

$\frac{4 \pi r^2}{\frac{4}{3} \pi r^3}$

Question 8

Which of the following statements about mitochondria and chloroplasts is TRUE?

Accepted Answer

Both convert energy into forms that cells can use for work

Question 9

A cell is observed to have tight junctions. What is the most likely function of these structures?

Accepted Answer

Preventing leakage of extracellular fluid between cells

Question 10

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

Accepted Answer

They use information from DNA to make proteins

Question 11

Which cell junction is unique to plant cells and allows cytoplasmic exchange between adjacent cells?

Accepted Answer

Plasmodesmata

Question 12

A cell is unable to detoxify poisons and metabolize lipids efficiently. Which organelle is most likely malfunctioning?

Accepted Answer

Smooth endoplasmic reticulum

Question 13

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

Accepted Answer

Synthesizing proteins

Question 14

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

Accepted Answer

Lysosome: Phagocytosis

Question 15

Which structure regulates the entry and exit of proteins and RNAs from the nucleus?

Accepted Answer

Nuclear pores

Question 16

A cell biologist observes that a cell has a double membrane surrounding its genetic material. Which organelle is being described?

Accepted Answer

Nucleus

Question 17

Which of the following is a correct statement about chromosomes in human cells?

Accepted Answer

Each chromosome consists of one long DNA molecule associated with proteins

Question 18

Which of the following is a function of the Golgi apparatus?

Accepted Answer

Modification and sorting of proteins

Question 19

Which cytoskeletal element is the thickest and is involved in the movement of cilia and flagella?

Accepted Answer

Microtubules

Question 20

A plant cell is placed in a hypotonic solution. Which organelle helps prevent the cell from bursting by storing excess water?

Accepted Answer

Central vacuole

Eukaryotic Cell Structure and Function: Membranes, Organelles, and Cellular Coordination

Study Guide - Practice Questions