7.12DEF cells and cell theory

What is the basic unit of life?

• molecule

• organism

• cell

• atom

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Explain the difference between prokaryotic and eukaryotic cells.

• Eukaryotic cells are unicellular, whereas prokaryotic cells are multicellular.

• Prokaryotic cells are larger in size compared to eukaryotic cells.

• Prokaryotic cells have a nucleus and membrane-bound organelles, while eukaryotic cells lack these structures.

• The main difference between prokaryotic and eukaryotic cells is the presence of a nucleus and membrane-bound organelles in eukaryotic cells, which are absent in prokaryotic cells.

What is the function of the cell membrane?

• Controls the movement of substances in and out of the cell.

• Stores genetic information

• Regulates body temperature

• Helps in photosynthesis

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Describe the structure and function of the nucleus.

• The nucleus is the control center of the cell, housing the genetic material and regulating cellular functions.

• The nucleus is only found in plant cells.

• The nucleus is responsible for energy production in the cell.

• The nucleus is a storage organelle for waste materials.

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What is the cell theory?

• The cell theory proposes that cells do not have genetic material.

• The cell theory suggests that cells are not the basic unit of life.

• The cell theory states that cells are only found in animals.

• The cell theory is the idea that all living things are composed of cells.

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List the three components of the cell theory.

• Cells are only found in animals

• Cells do not have genetic material

• All living organisms are composed of one or more cells, the cell is the basic unit of structure and organization in organisms, and cells arise from pre-existing cells.

• Cells can spontaneously generate from non-living matter

Explain the role of mitochondria in a cell.

• Mitochondria regulate cell division and growth

• Mitochondria produce energy through cellular respiration.

• Mitochondria synthesize proteins for the cell

• Mitochondria store genetic information in the form of DNA

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What are organelles?

• Tiny organisms that live inside cells

• Long chains of DNA found in the nucleus

• Specialized structures within a cell that perform specific functions.

• Fluid-filled sacs that store waste materials

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Name two organelles found in plant cells but not in animal cells.

• Mitochondria and Cytoplasm

• Cell Wall and nucleus

• Chloroplasts and LARGE Central Vacuole

• Cell Memebrane and Mitochondria

Describe the structure and function of the endoplasmic reticulum.

• The endoplasmic reticulum is a single membrane structure in prokaryotic cells.

• The rough endoplasmic reticulum is involved in lipid metabolism.

• The endoplasmic reticulum is a network of membranes in eukaryotic cells, with rough ER involved in protein synthesis and processing, and smooth ER involved in lipid metabolism and detoxification.

• The smooth endoplasmic reticulum is involved in protein synthesis.

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