Earth and Life Science

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Questions and Answers

What is the function of the cytoplasmic membrane?

  • Protein synthesis and modification
  • Selective permeability, protection, and transport of molecules (correct)
  • Energy production and storage
  • DNA replication and transcription

Which organelle is responsible for energy production in eukaryotic cells?

  • Golgi bodies
  • Nucleolus
  • Endoplasmic reticulum
  • Mitochondrion (correct)

What is the function of the nucleolus?

  • Ribosome production (correct)
  • DNA replication
  • Lipid synthesis
  • Protein degradation

Which organelle is involved in photosynthesis in plant cells?

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

What is the primary function of the nuclear membrane?

<p>Separates the nucleus from the cytoplasm (D)</p> Signup and view all the answers

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Study Notes

Cell Biology

  • Cell is the basic unit of life.
  • Cells are important for an organism's survival.

Types of Cells

  • There are two main types of cells: prokaryotic and eukaryotic cells.

Prokaryotic Cells

  • Characterized by the absence of a true nucleus.
  • Examples of prokaryotic cells include bacteria and archaea.

Eukaryotic Cells

  • Defined as cells containing an organized nucleus and organelles enveloped by membrane-bound organelles.
  • Examples of eukaryotic cells include animals, plants, fungi, and protists.

Cell Theory

  • The cell theory has three postulates that explain the structure and function of cells.

Discovery of Cells

  • Robert Hooke was the first person to observe cells as microscopic structures.

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