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Questions and Answers
What is the function of the nucleus in a cell?
What is the function of the nucleus in a cell?
- Regulates water balance in the cell
- Produces energy for the cell
- Controls cellular growth and repair (correct)
- Stores nutrients for the cell
Which of the following statements about prokaryotic cells is true?
Which of the following statements about prokaryotic cells is true?
- They contain multiple membrane-enclosed organelles.
- They are always multicellular organisms.
- They possess genetic material not contained within a nucleus. (correct)
- They have a true nucleus.
What are chromatin and where are they found?
What are chromatin and where are they found?
- Structures inside the nuclear envelope (correct)
- Proteins located in the cell membrane
- Organelles found in the cytoplasm
- Ribosomes located outside the nucleus
What happens to ribosomes after they are formed in the nucleolus?
What happens to ribosomes after they are formed in the nucleolus?
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Which component is found in all cells, regardless of type?
Which component is found in all cells, regardless of type?
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Study Notes
Cell Structure Overview
- Cells are the smallest units of an organism, fundamental to biological functions.
Common Features of All Cells
- All cells possess a cell membrane, cytoplasm, and DNA.
Types of Cells
- Cells are categorized into two main types: eukaryotic and prokaryotic.
Cell Organelles
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Nucleus
- Functions as the control center, primarily managing growth and repair.
- Houses DNA, which regulates cellular functions and development.
- Contains chromatin within the nuclear envelope.
- Nucleolus
- Located inside the nucleus, involved in ribosome production.
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Eukaryotic Cells
- Characterized by a true nucleus that contains genetic material.
- Possess various organelles that perform specific functions.
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Prokaryotic Cells
- Lack a true nucleus; genetic material is not enclosed within a nuclear membrane.
- Cytoplasm has a jelly-like consistency, providing a medium for organelles.
- Typically unicellular and do not have membrane-bound organelles.
Ribosomes
- Ribosomes are generated in the nucleolus and can exist freely in the cytoplasm or attach to the rough endoplasmic reticulum (RER) for protein synthesis.
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