Question 1

Which organelle is primarily responsible for sorting, modifying, and packaging proteins for export out of the cell?

Accepted Answer

Golgi apparatus

Question 2

A mutation causes a cell to lack functional microtubules. Which of the following processes would be most directly affected?

Accepted Answer

Separation of chromosomes during mitosis

Question 3

During the process of protein export, which is the correct sequence of organelles that a newly synthesized protein passes through, starting from its synthesis to its release outside the cell?

Accepted Answer

Nucleus → Rough ER → Golgi apparatus → Plasma membrane

Question 4

Which of the following best describes the function of the lysosome?

Accepted Answer

Digests food, bacteria, and worn-out organelles

Question 5

A plant cell is observed to be unable to maintain its rigid structure and is wilting. Which organelle is most likely malfunctioning?

Accepted Answer

Cell wall

Question 6

Which cytoskeletal component is primarily responsible for muscle contraction and cell movement?

Accepted Answer

Actin filaments (microfilaments)

Question 7

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

Accepted Answer

Protein synthesis for export

Question 8

Which organelle is responsible for capturing light energy and converting it into chemical energy through photosynthesis?

Accepted Answer

Chloroplast

Question 9

A sperm cell is unable to swim properly. Which structure is most likely defective?

Accepted Answer

Flagella

Question 10

Which of the following best describes the function of the plasma membrane?

Accepted Answer

Separates the cell from the outside environment and is selectively permeable

Question 11

A cell is observed to have an abnormally high concentration of calcium ions ($Ca^{2+}$) in its cytoplasm. Which organelle is most likely malfunctioning?

Accepted Answer

Smooth endoplasmic reticulum

Question 12

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

Accepted Answer

Synthesizing proteins

Question 13

If a cell lacked functional intermediate filaments, which of the following would most likely occur?

Accepted Answer

The cell would be more susceptible to mechanical stress and deformation

Question 14

Which organelle is responsible for storing water, food, enzymes, and other materials in plant cells?

Accepted Answer

Vacuole

Question 15

A scientist observes a eukaryotic cell with a defective Golgi apparatus. Which of the following is the most likely consequence?

Accepted Answer

Proteins will not be properly sorted and modified for export

Question 16

Which of the following best explains why mitochondria are called the 'powerhouse' of the cell?

Accepted Answer

They produce energy in the form of ATP through cellular respiration

Question 17

A cell is unable to detoxify harmful substances and cannot synthesize lipids efficiently. Which organelle is most likely defective?

Accepted Answer

Smooth endoplasmic reticulum

Question 18

Which of the following is a direct consequence of a cell lacking actin filaments?

Accepted Answer

Loss of cell shape and inability to perform cellular contractions

Question 19

Which organelle contains cellulose and provides a rigid layer of protection in plant cells?

Accepted Answer

Cell wall

Question 20

A cell is observed to have a defective cilia structure. Which of the following functions would be most directly affected?

Accepted Answer

Cell locomotion and movement of substances across the cell surface

Cell Structure, Organelles, and the Cytoskeleton: Study Notes for General Biology

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