Cell and Cell Theory Quiz

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Questions and Answers

Which of the following statements is a fundamental tenet of the cell theory?

  • All living organisms are composed of one or more cells. (correct)
  • Cells can spontaneously generate from non-living matter.
  • All cells exist in multicellular organisms.
  • Cells are formed from molecules smaller than themselves.

What is the primary distinction between eukaryotic and prokaryotic cells?

  • Eukaryotic cells contain membrane-bound organelles, including a nucleus. (correct)
  • Prokaryotic cells contain membrane-bound organelles, including a nucleus.
  • Prokaryotic cells are generally larger and more complex than eukaryotic cells.
  • Eukaryotic cells lack a plasma membrane.

Which of the following structures is present in eukaryotic cells but absent in prokaryotic cells?

  • Ribosomes
  • Cytoplasm
  • Cell Wall
  • Nucleus (correct)

Within a eukaryotic cell, what is the function of organelles?

<p>To carry out specific functions necessary for life (D)</p> Signup and view all the answers

Which example is matched INCORRECTLY?

<p>Rose : Prokaryote (D)</p> Signup and view all the answers

What is the primary function of the cell membrane?

<p>To support the cell and regulate the movement of substances in and out. (B)</p> Signup and view all the answers

Which organelle is responsible for generating energy through cellular respiration?

<p>Mitochondrion (C)</p> Signup and view all the answers

Where is DNA primarily located within a eukaryotic cell?

<p>Nucleus (C)</p> Signup and view all the answers

Which of the following is a primary function of the endoplasmic reticulum?

<p>Transporting materials throughout the cell (C)</p> Signup and view all the answers

What is the main role of Golgi bodies within a cell?

<p>Collecting and processing materials to be removed from the cell (D)</p> Signup and view all the answers

What is cytoplasm primarily composed of?

<p>Water and dissolved substances (A)</p> Signup and view all the answers

What feature makes the cell membrane 'semi-permeable'?

<p>Its selective control over which molecules can pass through (C)</p> Signup and view all the answers

What is the waste product of cellular respiration?

<p>Carbon dioxide and water (B)</p> Signup and view all the answers

Which structure is present in plant cells but not in animal cells?

<p>Cell wall (C)</p> Signup and view all the answers

What is the function of the vacuole?

<p>Storing substances, removing unwanted substances and to maintain internal fluid pressure (A)</p> Signup and view all the answers

Flashcards

Cell Theory

A fundamental theory stating that all living things are made of cells, cells are basic units of life, and come from pre-existing cells.

Prokaryotes

Cells without a nucleus or membrane-bound organelles, like bacteria.

Eukaryotes

Cells with a nucleus and membrane-bound organelles, such as plants and animals.

Organelles

Specialized structures within eukaryotic cells that perform specific functions.

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Basic Unit of Life

Cells are considered the basic unit of all living organisms.

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Cytoplasm

The fluid within a cell where organelles are suspended and chemical reactions occur.

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Cell Membrane

A semi-permeable barrier that surrounds the cell, controlling what enters and exits.

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Nucleus

The control center of the cell that contains genetic information in chromosomes.

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Mitochondria

Energy-producing organelles known as the cell's power plants; convert glucose into usable energy.

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Endoplasmic Reticulum (ER)

A network of tubes that transports materials and aids in protein and hormone production.

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Golgi Bodies

Organelles that collect, process, and transport materials out of the cell, including mucus.

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Vacuoles

Fluid-filled sacs that store materials, maintain pressure, and help in waste removal.

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Cell Wall

A rigid outer layer found in plant cells providing structure and support, not present in animal cells.

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Chloroplasts

Organelles in plant cells that convert light energy into chemical energy through photosynthesis.

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Difference between Plant and Animal Cells

Plant cells have cell walls, large vacuoles, and chloroplasts; animal cells do not.

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Study Notes

Cell and Cell Theory

  • Cells are the smallest units of life.
  • Modern biology is based on cell theory.

The Cell Theory

  • All living things are made up of one or more cells.
  • Cells are the basic units of life and carry out all life processes.
  • All cells come from pre-existing cells.

Two Types of Cells:

Prokaryotes

  • Cells that do not contain a nucleus or other membrane-bound organelles.
  • Ex: e. coli bacteria

Eukaryotes

  • Cells that contain a nucleus and other organelles, each surrounded by a thin membrane.
  • Ex: Amoeba, whale, plant
  • Eukaryotes have specialized parts called organelles that carry out specific functions necessary for life.

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