Question 1

Which of the following best describes the primary function of the rough endoplasmic reticulum (RER) in a eukaryotic cell?

Accepted Answer

Protein synthesis and modification for export or membrane insertion

Question 2

A scientist wants to observe the detailed internal structure of mitochondria at the molecular level. Which microscopy technique should they use, and why?

Accepted Answer

Transmission electron microscopy, because it allows visualization of internal ultrastructure at very high resolution

Question 3

Which of the following best explains why the plasma membrane is described as a 'fluid mosaic'?

Accepted Answer

It consists of a phospholipid bilayer with proteins and other molecules that move laterally within the layer

Question 4

A red blood cell is placed in a hypotonic solution. Which process will occur, and what is the likely outcome for the cell?

Accepted Answer

Osmosis; water will enter the cell, causing it to swell and possibly lyse

Question 5

Which of the following best defines a concentration gradient?

Accepted Answer

A difference in the concentration of a substance between two regions

Question 6

Which organelle is primarily responsible for packaging and modifying proteins for secretion from the cell?

Accepted Answer

Golgi apparatus

Question 7

A patient has a genetic disorder that affects the function of lysosomes. Which of the following cellular processes is most likely to be impaired?

Accepted Answer

Intracellular digestion of macromolecules

Question 8

Which of the following statements about facilitated diffusion is correct?

Accepted Answer

It uses membrane proteins to transport substances down their concentration gradient

Question 9

Which of the following best describes the role of carbohydrates in the plasma membrane?

Accepted Answer

They are involved in cell recognition and glycosylation

Question 10

A cell is observed to have abundant smooth endoplasmic reticulum. Which function is this cell most likely specialized for?

Accepted Answer

Lipid synthesis and detoxification

Question 11

Which of the following equations correctly represents the calculation of osmotic pressure ($$\Pi) $$using van't Hoff's law?

Accepted Answer

$$\Pi = iMRT$$

Question 12

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

Accepted Answer

They generate ATP through cellular respiration

Question 13

A researcher is studying the cytoskeleton. Which of the following functions is NOT associated with the cytoskeleton?

Accepted Answer

Synthesizing ATP

Question 14

Which of the following best describes the process of osmosis?

Accepted Answer

Movement of water molecules across a semipermeable membrane from low solute concentration to high solute concentration

Question 15

Which of the following is a function of peroxisomes in eukaryotic cells?

Accepted Answer

Breakdown of fatty acids and detoxification of hydrogen peroxide

Question 16

A cell is placed in a solution with a higher solute concentration than its cytoplasm. Which direction will water move, and what is the process called?

Accepted Answer

Water will move out of the cell by osmosis

Question 17

Which of the following best describes the function of ribosomes?

Accepted Answer

Synthesis of proteins

Question 18

A patient is diagnosed with a disease that impairs the function of the Golgi apparatus. Which of the following cellular processes is most likely to be affected?

Accepted Answer

Modification and sorting of proteins for secretion

Question 19

Which of the following statements about simple diffusion is correct?

Accepted Answer

It is a passive process that moves substances down their concentration gradient

Question 20

A cell is observed to have an extensive network of cytoskeletal filaments. Which of the following is NOT a function of the cytoskeleton?

Accepted Answer

Synthesizing membrane lipids

Cell Structure, Microscopy, and Membrane Transport: Study Notes for Anatomy & Physiology

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