Question 1

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

Accepted Answer

They produce most of the cell's ATP through aerobic respiration.

Question 2

A cell is observed to have an abundance of smooth endoplasmic reticulum (SER). Which function is this cell most likely specialized for?

Accepted Answer

Detoxification of harmful substances

Question 3

Which organelle is responsible for packaging, modifying, and sorting proteins and lipids for delivery to their appropriate destinations?

Accepted Answer

Golgi apparatus

Question 4

A mutation prevents the formation of catalase in peroxisomes. What is the most likely consequence for the cell?

Accepted Answer

Accumulation of hydrogen peroxide, leading to cellular damage

Question 5

Which of the following is a nonmembranous organelle involved in protein synthesis?

Accepted Answer

Ribosome

Question 6

During protein synthesis, which process involves the copying of genetic information from DNA to mRNA?

Accepted Answer

Transcription

Question 7

A cell is unable to break down ingested bacteria and debris. Which organelle is most likely malfunctioning?

Accepted Answer

Lysosome

Question 8

Which of the following best explains why compartmentalization by organelle membranes is crucial for cell function?

Accepted Answer

It enables simultaneous, specialized metabolic processes without interference.

Question 9

Which cellular structure is primarily responsible for organizing microtubules during cell division?

Accepted Answer

Centrosome

Question 10

A cell is observed to have many cilia on its surface. What is the most likely function of this cell?

Accepted Answer

Movement of materials across the cell surface

Question 11

Which of the following is TRUE regarding the genetic code and protein synthesis?

Accepted Answer

A codon consists of three bases and specifies one amino acid.

Question 12

If a cell's rough endoplasmic reticulum (RER) is damaged, which process will be most directly affected?

Accepted Answer

Synthesis of membrane-bound and secretory proteins

Question 13

Which of the following equations correctly represents the detoxification reaction carried out by peroxisomes?

Accepted Answer

$$2H_2O_2 \rightarrow 2H_2O + O_2$

Question 14

Which type of RNA carries amino acids to the ribosome during translation?

Accepted Answer

Transfer RNA (tRNA)

Question 15

A cell is found to have defective microfilaments. Which cellular process is most likely to be impaired?

Accepted Answer

Cellular movement and shape changes

Question 16

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

Accepted Answer

It assembles ribosomal RNA and ribosome subunits.

Question 17

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

Accepted Answer

Synthesizing proteins

Question 18

A cell is observed to have large numbers of pigment inclusions. Which type of cell is this most likely to be?

Accepted Answer

A skin cell (melanocyte)

Question 19

Which of the following statements about ribosomes is correct?

Accepted Answer

They consist of protein and ribosomal RNA subunits.

Question 20

A cell is unable to convert glycogen to free glucose. Which organelle is most likely malfunctioning?

Accepted Answer

Smooth endoplasmic reticulum (SER)

Cells: The Living Units – Structure and Function of Cytoplasm and Organelles

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