Endosymbiosis and Cell theory

What is the endosymbiotic theory?

• The endosymbiotic theory explains how plants produce energy through photosynthesis.

• The endosymbiotic theory is about the formation of the solar system.

• The endosymbiotic theory describes the evolution of dinosaurs.

• The endosymbiotic theory explains the origin of eukaryotic cells from symbiotic relationships between prokaryotic organisms.

List two key pieces of evidence supporting endosymbiosis.

• 1. Mitochondria and chloroplasts have double membranes. 2. They contain their own circular DNA.

• Both organelles are derived from the nucleus of the cell.

• Mitochondria and chloroplasts are found in all eukaryotic cells.

• They are responsible for protein synthesis in the cell.

What are the three major principles of cell theory?

• All living organisms are made of tissues and organs

• 1) All living organisms are composed of one or more cells, 2) The cell is the basic unit of life, 3) All cells arise from pre-existing cells.

• Cells can spontaneously generate from non-living matter

• All cells contain a nucleus

How do prokaryotic cells differ from eukaryotic cells?

• Prokaryotic cells differ from eukaryotic cells in that they lack a nucleus and membrane-bound organelles, have circular DNA, and are generally smaller and simpler.

• Prokaryotic cells contain linear DNA and are larger than eukaryotic cells.

• Eukaryotic cells are generally smaller and simpler than prokaryotic cells.

• Prokaryotic cells have a nucleus and complex organelles.

What is one application of cell theory in modern biology?

• Photosynthesis in plants

• Cellular respiration in animals

• DNA replication processes

• Regenerative medicine and cancer therapies.

Explain how mitochondria support the endosymbiotic theory.

• Mitochondria are only found in plant cells.

• Mitochondria support the endosymbiotic theory by having their own circular DNA, replicating independently, and possessing double membranes.

• Mitochondria are responsible for photosynthesis.

• Mitochondria do not have any DNA.

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What role do chloroplasts play in the endosymbiotic theory?

• Chloroplasts originated from engulfed photosynthetic bacteria, supporting the endosymbiotic theory.

• Chloroplasts are responsible for cellular respiration in plants.

• Chloroplasts are derived from animal cells that lost their function.

• Chloroplasts are involved in the synthesis of proteins in the nucleus.

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Describe the significance of cell theory in understanding life.

• Cell theory is only applicable to multicellular organisms.

• Cell theory suggests that cells can spontaneously generate from non-living matter.

• Cell theory states that all cells are identical in structure and function.

• Cell theory is significant as it defines the cell as the basic unit of life, unifying all living organisms under a common biological framework.

What is a common characteristic of all prokaryotic cells?

• They have a complex cell wall structure.

• They reproduce through mitosis.

• They lack a membrane-bound nucleus.

• They contain membrane-bound organelles.

How has the cell theory influenced scientific research?

• The cell theory was developed in the 21st century.

• Cell theory only applies to plant cells and not animals.

• The cell theory has provided a foundational framework for understanding biological processes, guiding research in cell biology, genetics, and medicine.

• The cell theory has no impact on scientific research.