Cell Structure and Function

From the study guide

Course Outline

  1. Cell Types and Shared Structures
  2. Eukaryotic Organelles and Functions
  3. Endosymbiosis and Cell Efficiency
  4. Surface Area to Volume
  5. Plasma Membrane Structure
  6. Membrane Transport Mechanisms
  7. Water Potential and Osmosis
  8. Osmolarity and Water Balance

1. Cell Types and Shared Structures

Key Concepts & Definitions

  • Prokaryotic cell: a relatively simple cell whose circular DNA lies in a nucleoid region and that lacks membrane-bound organelles
  • Eukaryotic cell: a complex cell containing membrane-bound organelles and linear chromosomes enclosed within a nucleus

Essential Points

  • All cells contain:
    • genetic material
    • ribosomes
    • cytosol
    • a plasma membrane

📌 Prokaryotic DNA is generally a circular chromosome in the nucleoid and may include plasmids, whereas eukaryotic DNA is packaged into linear chromosomes inside a membrane-bound nucleus.

Memory Hook

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Practice quiz preview

1. Which feature best identifies a prokaryotic cell?

2. What distinguishes a eukaryotic cell from a prokaryotic cell?

3. Which set of structures is present in both prokaryotic and eukaryotic cells?

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Flashcard preview

What defines a prokaryotic cell's DNA structure and organelles?

It has circular DNA in a nucleoid and lacks membrane-bound organelles.

What characterizes a eukaryotic cell's chromosomes and organelles?

It has linear chromosomes in a nucleus and membrane-bound organelles.

Which components are common to both prokaryotic and eukaryotic cells?

Genetic material, ribosomes, cytosol, and a plasma membrane.

Where is prokaryotic DNA located and what form does it take?

In the nucleoid as a circular chromosome, sometimes with plasmids.

How is eukaryotic DNA organized and enclosed?

Into linear chromosomes inside a membrane-bound nucleus.

What is a ribosome made of?

Proteins and ribosomal RNA.

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Frequently asked questions

What does the Cell Structure and Function study guide cover?

It covers the core concepts of Cell Structure and Function, organized by topic with the key definitions, explanations and takeaways, so it's easier to learn and remember.

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How many questions are in the Cell Structure and Function quiz?

The practice quiz has 27 multiple-choice questions, each with an explanation. Use it to check what you know and find your gaps.

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There are 48 flashcards on Cell Structure and Function, with a question on the front and the answer on the back. Try to recall each answer before you flip, and let spaced repetition bring back the ones you miss.

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