Question 1

A scientist observes a cell structure that acts as a 'post office,' packaging and shipping proteins to their destinations. Which organelle is being described, and what would likely happen if this organelle malfunctioned?

Accepted Answer

Golgi apparatus; proteins would not be properly modified or sent to their correct locations

Question 2

Which of the following best describes the function of the peroxisome in a liver cell exposed to high levels of alcohol?

Accepted Answer

It breaks down toxins such as hydrogen peroxide, protecting the cell from oxidative damage

Question 3

A mutation causes the 'tiny doors' in the nucleus to become blocked. Which process would be most directly affected?

Accepted Answer

Transport of mRNA from the nucleus to the cytoplasm

Question 4

Which organelle is most directly responsible for the synthesis of lipids, and what would be the effect of its dysfunction on a cell's membrane composition?

Accepted Answer

Smooth ER; the cell membrane would have reduced lipid content, affecting fluidity

Question 5

A cell is unable to divide properly due to a defect in the 'two straws' that help with cell division. Which structure is defective, and what is its main role?

Accepted Answer

Centrioles; organizing the mitotic spindle during cell division

Question 6

If a cell's mitochondria are damaged, which of the following equations best represents the process that would be impaired?

Accepted Answer

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

Question 7

A genetic disorder prevents the formation of ribosomes in a cell. Which process would be most directly affected?

Accepted Answer

Protein synthesis

Question 8

Which organelle is described as 'cell soup' and what is its primary function?

Accepted Answer

Cytosol; it is the fluid part inside the cell where metabolic reactions occur

Question 9

A cell is observed to have an accumulation of undigested waste. Which organelle is most likely malfunctioning, and what is its normal function?

Accepted Answer

Lysosome; it contains enzymes that break down waste and cellular debris

Question 10

Which of the following best explains the relationship between the rough ER and ribosomes?

Accepted Answer

The rough ER is studded with ribosomes, which synthesize proteins that are then processed by the ER

Question 11

A researcher is studying a cell that cannot transport proteins out of the cell. Which two organelles are most likely involved in this defect?

Accepted Answer

Golgi apparatus and vesicles

Question 12

If the nuclear envelope is damaged, which of the following is a likely consequence?

Accepted Answer

DNA in the nucleus would be exposed to cytoplasmic enzymes, risking genetic damage

Question 13

Which of the following best describes the function of vesicles in a neuron transporting neurotransmitters?

Accepted Answer

Vesicles carry neurotransmitters to the synaptic membrane for release

Question 14

A cell is exposed to a toxin that specifically inhibits the centrosome. Which process would be most directly affected?

Accepted Answer

Organization of microtubules during cell division

Question 15

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

Accepted Answer

Ribosome → Rough ER → Golgi apparatus → Vesicle → Plasma membrane

Question 16

A patient has a genetic disorder that prevents the breakdown of hydrogen peroxide in their cells. Which organelle is most likely defective, and what is the relevant chemical reaction?

Accepted Answer

Peroxisome; $$ 2\ \mathrm{H_2O_2} \rightarrow 2\ \mathrm{H_2O} + \mathrm{O_2$} $$

Question 17

Which organelle is responsible for making ribosomes, and what would be the effect of its dysfunction?

Accepted Answer

Nucleolus; the cell would have reduced protein synthesis due to fewer ribosomes

Question 18

A cell is observed to have an excess of fatty acids and oils. Which organelle is most likely overactive, and what is its primary function?

Accepted Answer

Smooth ER; synthesis of lipids

Question 19

If a mutation prevents vesicles from fusing with the plasma membrane, which cellular process would be most directly impaired?

Accepted Answer

Exocytosis

Question 20

A cell is unable to produce ATP efficiently. Which organelle is most likely malfunctioning, and what is the main energy-carrying molecule produced?

Accepted Answer

Mitochondria; ATP ($$ \mathrm{adenosine\ triphosphate} )$$

Cell Parts and Their Functions: Study Guide for Anatomy & Physiology

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