Question 1

Which of the following best describes the process illustrated in the diagram provided (showing the movement from Rough ER to Golgi to plasma membrane)?

Accepted Answer

The synthesis and secretion of a soluble protein via the endomembrane system.

Question 2

What is the primary function of the rough endoplasmic reticulum (Rough ER) as shown in the diagram?

Accepted Answer

Synthesis of proteins that are destined for secretion or for membranes.

Question 3

During the secretory pathway, which of the following modifications is most likely to occur to a protein as it passes through the Golgi apparatus?

Accepted Answer

Addition of carbohydrate groups (glycosylation) to form glycoproteins.

Question 4

Which of the following best describes the final step depicted in the diagram, where a vesicle fuses with the plasma membrane?

Accepted Answer

Exocytosis, where the vesicle releases its contents outside the cell.

Question 5

If a mutation prevented vesicles from fusing with the Golgi apparatus, what would be the most immediate consequence for the cell?

Accepted Answer

Proteins synthesized in the rough ER would accumulate and not be properly modified or sorted.

Question 6

Which of the following equations best represents the energy change ($$\Delta G) $$for the exocytosis process shown in the diagram?

Accepted Answer

$$\Delta G \u003c 0$$

Question 7

A protein destined to be secreted from the cell is synthesized by ribosomes attached to which structure in the diagram?

Accepted Answer

Rough ER

Question 8

Which of the following best explains why the endomembrane system is necessary for eukaryotic cells but not for prokaryotic cells?

Accepted Answer

Eukaryotic cells compartmentalize functions to increase efficiency and complexity, while prokaryotic cells lack internal membranes.

Question 9

If a glycoprotein is destined to be embedded in the plasma membrane, where would its carbohydrate groups face after insertion?

Accepted Answer

The extracellular side of the plasma membrane.

Question 10

Which of the following best describes the role of transport vesicles in the pathway shown in the diagram?

Accepted Answer

They shuttle proteins and lipids between organelles within the endomembrane system.

Question 11

Suppose a toxin disrupts the function of the Golgi apparatus. Which of the following cellular processes would be most directly affected?

Accepted Answer

Modification and sorting of proteins for secretion or delivery to other organelles.

Question 12

Which of the following is a key difference between the rough ER and the smooth ER?

Accepted Answer

The rough ER is studded with ribosomes and synthesizes proteins, while the smooth ER lacks ribosomes and synthesizes lipids.

Cell Structure, Metabolism, Cellular Respiration, and Photosynthesis: Exam #2 Study Guide

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