Question 1

Which of the following best describes the amphipathic nature of phospholipids in biological membranes?

Accepted Answer

They have both hydrophilic and hydrophobic regions, allowing them to form bilayers in water.

Question 2

A red blood cell is placed in a hypotonic solution. What will most likely happen to the cell, and why?

Accepted Answer

Water will enter the cell by osmosis, causing it to swell and possibly burst.

Question 3

Which of the following statements about the sodium-potassium pump is correct?

Accepted Answer

It uses ATP to move sodium and potassium ions against their concentration gradients.

Question 4

Which structure is found in both prokaryotic and eukaryotic cells and is responsible for protein synthesis?

Accepted Answer

Ribosome

Question 5

A mutation prevents the addition of a nuclear localization signal (NLS) to a protein. What is the most likely consequence?

Accepted Answer

The protein will remain in the cytosol and not enter the nucleus.

Question 6

Which of the following best explains why eukaryotic cells can be much larger than prokaryotic cells?

Accepted Answer

Eukaryotic cells have organelles that compartmentalize functions, increasing efficiency.

Question 7

Which organelle is responsible for the synthesis of lipids and detoxification of harmful substances in eukaryotic cells?

Accepted Answer

Smooth endoplasmic reticulum

Question 8

A cell is observed to have a large number of lysosomes. Which of the following is the most likely function of this cell?

Accepted Answer

Digesting and recycling macromolecules and cellular debris

Question 9

Which of the following best describes the function of the Golgi apparatus?

Accepted Answer

Processing, sorting, and shipping proteins to their correct destinations

Question 10

During receptor-mediated endocytosis, what is the sequence of events that leads to the formation of a lysosome?

Accepted Answer

Particles bind to receptors, vesicle forms, vesicle matures into endosome, acid hydrolases are delivered, forming a lysosome.

Question 11

Which cytoskeletal element is primarily responsible for separating chromosomes during mitosis and meiosis?

Accepted Answer

Microtubules

Question 12

A scientist observes a cell with a cell wall composed of peptidoglycan. To which group does this cell most likely belong?

Accepted Answer

Bacteria

Question 13

Which of the following is a function of actin filaments in animal cells?

Accepted Answer

Cytokinesis during cell division

Question 14

Which of the following best explains the role of peroxisomes in eukaryotic cells?

Accepted Answer

They are centers for redox reactions and detoxification of hydrogen peroxide.

Question 15

A plant cell is observed to have many large vacuoles. What is the most likely function of these vacuoles?

Accepted Answer

Storage of water and ions, and sometimes digestion of macromolecules

Question 16

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

Accepted Answer

Both have their own DNA and can divide independently of the cell.

Question 17

Which of the following best describes the function of fimbriae in prokaryotic cells?

Accepted Answer

Attachment to surfaces or other cells

Question 18

A protein is synthesized in the rough ER and must be secreted outside the cell. Which pathway does it most likely follow?

Accepted Answer

Rough ER → Golgi apparatus → transport vesicle → plasma membrane

Question 19

Which of the following is a real-world example of the importance of selective permeability in the plasma membrane?

Accepted Answer

Kidney cells reabsorb water and ions while preventing the loss of essential nutrients.

Question 20

Which of the following best explains why proteins destined for the lysosome must be tagged with a specific molecular marker?

Accepted Answer

To ensure they are delivered to the correct organelle for function or degradation

Inside the Cell: Structure and Function of Prokaryotic and Eukaryotic Cells

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