Cell Structure and Function Quiz

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Questions and Answers

What structure is notably absent in animal cells compared to plant cells?

  • Nucleus
  • Mitochondria
  • Cell wall (correct)
  • Chloroplasts

What is a primary function of cells in living organisms?

  • Storing genetic information
  • Supporting organ functions (correct)
  • Communicating with the environment
  • Performing photosynthesis

Which type of cell typically contains a cell wall made of chitin?

  • Protist cells
  • Plant cells
  • Animal cells
  • Fungi cells (correct)

What role does the plasma membrane play in animal cells?

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

Which organelle is responsible for energy production in animal cells?

<p>Mitochondria (B)</p> Signup and view all the answers

Which type of cell is capable of photosynthesis?

<p>Protist cells (D)</p> Signup and view all the answers

What tissue is specifically mentioned as providing structural support in vascular plants?

<p>Xylem (B)</p> Signup and view all the answers

How do cells contribute to the overall function of an organism?

<p>By communicating and forming tissues. (C)</p> Signup and view all the answers

What are the three basic structural components of a cell?

<p>Cell membrane, nucleus, and cytoplasm (D)</p> Signup and view all the answers

What is the primary function of the cell membrane?

<p>To serve as the cell's boundary and control material flow (B)</p> Signup and view all the answers

Which of the following describes the function of the nucleus in a eukaryotic cell?

<p>It houses genetic information and controls growth (C)</p> Signup and view all the answers

Which type of cell is characterized as always being unicellular?

<p>Prokaryotic cells (B)</p> Signup and view all the answers

Where does the majority of a cell's functions, including growth and replication, occur?

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

What component of the cell is responsible for maintaining its integrity?

<p>Cell membrane (B)</p> Signup and view all the answers

Which statement correctly defines eukaryotic cells?

<p>They can be either unicellular or multicellular and contain a nucleus. (A)</p> Signup and view all the answers

What is the gel-like fluid that fills the interior of a cell called?

<p>Cytoplasm (A)</p> Signup and view all the answers

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Study Notes

Cell Structure and Function

  • A cell consists of three fundamental components: the cell membrane, nucleus, and cytoplasm.
  • The cell membrane acts as a barrier, distinguishing intracellular material from extracellular material, and regulates material exchange.
  • The nucleus houses genetic material and controls cell growth and reproduction; it is the largest organelle in eukaryotic cells.
  • Prokaryotic cells are unicellular, while eukaryotic cells can be unicellular or multicellular, encompassing all animals, plants, fungi, and protists.

Eukaryotic vs. Prokaryotic Cells

  • Eukaryotic cells are defined by their membrane-bound organelles and can be part of multicellular organisms.
  • Animal cells contain organelles such as the nucleus, mitochondria, Golgi apparatus, and endoplasmic reticulum, surrounded by a plasma membrane.
  • Plant cells have unique structures like a cell wall and chloroplasts, which are absent in animal cells.
  • Fungi cells possess a cell wall mainly made of chitin but do not carry out photosynthesis.
  • Protist cells contain all organelles found in animal cells and may have chloroplasts.

Importance of Cells

  • Cells are the smallest reproducible units, performing vital roles in the structure and function of living organisms.
  • They form various body tissues, such as skin, muscle, and bone, which come together to create organs.
  • Cell communication and connectivity are essential for maintaining the organism's integrity and function.
  • Human skin consists of numerous specialized skin cells, showcasing the importance of cells in overall structure.
  • The body continuously replaces cells through division, which is necessary for growth and healing.

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