Question 1

Which organelle is primarily responsible for producing ATP, the main energy currency of the cell, and what is the main process it uses to do so?

Accepted Answer

Mitochondrion; it uses cellular respiration to produce ATP.

Question 2

A mutation causes a cell to be unable to package and ship proteins and lipids efficiently. Which organelle is most likely affected?

Accepted Answer

Golgi Apparatus

Question 3

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

Accepted Answer

They assemble amino acids into proteins using mRNA as a template.

Question 4

A scientist observes a cell with a large number of smooth endoplasmic reticulum (ER). Which function is this cell most likely specialized for?

Accepted Answer

Lipid synthesis and detoxification

Question 5

Which organelle contains hydrolytic enzymes and is responsible for breaking down waste and old cell parts?

Accepted Answer

Lysosome

Question 6

A plant cell is able to convert sunlight into chemical energy. Which organelle is responsible for this process, and what is the main equation for photosynthesis?

Accepted Answer

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

Question 7

Which structure is responsible for controlling what enters and leaves the cell, and what is its main structural component?

Accepted Answer

Plasma membrane; composed mainly of phospholipids

Question 8

A cell is unable to maintain its shape and internal organization. Which cytoskeletal component is most likely defective?

Accepted Answer

Intermediate filaments

Question 9

Which of the following best describes the role of the nucleolus within the nucleus?

Accepted Answer

It is the site where ribosomal RNA is synthesized and ribosome assembly begins.

Question 10

A genetic disorder causes a defect in the nuclear envelope, making it more permeable. Which of the following is a likely consequence?

Accepted Answer

Uncontrolled entry of proteins and RNA into the nucleus

Question 11

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

Accepted Answer

Golgi apparatus: packages and ships proteins and lipids

Question 12

A cell is observed to have a high concentration of microfilaments. Which function is this cell likely specialized for?

Accepted Answer

Facilitating cell movement and muscle contraction

Question 13

Which of the following best explains why the rough endoplasmic reticulum (ER) appears 'rough' under a microscope?

Accepted Answer

It is covered with ribosomes on its surface.

Question 14

A patient has a disease that prevents the breakdown of fatty acids, leading to toxic accumulation in the liver. Which organelle is most likely malfunctioning?

Accepted Answer

Peroxisome

Question 15

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

Accepted Answer

Synthesizing proteins

Question 16

During cell division, which structure organizes the microtubules that separate chromosomes?

Accepted Answer

Centrosome

Question 17

Which of the following best describes the relationship between the nucleus and the endoplasmic reticulum (ER)?

Accepted Answer

The nuclear envelope is continuous with the ER membrane.

Question 18

A cell is unable to export proteins to the plasma membrane. Which sequence of organelles is most likely disrupted?

Accepted Answer

Ribosome → Endoplasmic Reticulum → Golgi Apparatus

Question 19

Which of the following is a unique feature of plant cells not found in animal cells, and what is its primary function?

Accepted Answer

Chloroplast; carrying out photosynthesis

Question 20

If a cell's chromatin is abnormally condensed and inaccessible, which process is most likely to be impaired?

Accepted Answer

DNA replication and transcription

Cell Organelles and Their Functions: A Study Guide

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