18 Questions
Where is a polypeptide synthesized according to the text?
Rough ER
What is the function of the Golgi Apparatus in the endomembrane system?
Sorts & packages materials
What do lysosomes contain within a cell?
Digestive enzymes
Which organelle provides an acidic environment for its enzymes?
Lysosomes
What organelle synthesizes, modifies, and packages secretory proteins?
Rough ER
Which structure is responsible for the synthesis of polypeptides?
Ribosomes
Which organelles are part of the endomembrane system?
Golgi apparatus and plasma membrane
What is the main function of the rough endoplasmic reticulum?
Production of enzymes
Which organelle is known for being abundant in cells that secrete proteins?
Smooth endoplasmic reticulum
What is a defining characteristic of the smooth endoplasmic reticulum?
Abundance in cells that synthesize lipids
Which organelle is responsible for packaging secretory proteins into transport vesicles?
Golgi apparatus
What distinguishes rough endoplasmic reticulum from smooth endoplasmic reticulum?
Attachment of ribosomes
What is the function of the nucleolus in a cell?
Site of ribosomal RNA synthesis
Which organelle is involved in the genetic control of the cell?
Nucleus
What is the main function of the nuclear envelope in a cell?
Regulate the entry and exit of large molecules
Where are free ribosomes found in a cell?
Floating in the cytosol
What is the role of rough endoplasmic reticulum in protein synthesis?
Make proteins for export
Which organelle is responsible for converting genetic information into proteins?
Nucleus
Study Notes
Protein Synthesis and Endomembrane System
- Polypeptides are synthesized on ribosomes, which can be found free in the cytoplasm or attached to the rough endoplasmic reticulum.
- The rough endoplasmic reticulum is responsible for the synthesis of polypeptides and is characterized by the presence of ribosomes attached to its surface.
- The main function of the rough endoplasmic reticulum is to synthesize and modify proteins.
Endomembrane System
- The endomembrane system consists of the rough endoplasmic reticulum, smooth endoplasmic reticulum, Golgi apparatus, and lysosomes.
- The Golgi apparatus is responsible for modifying, packaging, and transporting proteins and lipids.
- Lysosomes contain digestive enzymes and are responsible for cellular digestion and recycling.
- The Golgi apparatus provides an acidic environment for its enzymes.
Organelle Functions
- The smooth endoplasmic reticulum is involved in lipid synthesis, detoxification, and storage, and is characterized by the absence of ribosomes.
- The rough endoplasmic reticulum is abundant in cells that secrete proteins.
- The Golgi apparatus is responsible for packaging secretory proteins into transport vesicles.
- The nucleolus is involved in the genetic control of the cell and is responsible for ribosome synthesis.
- The nuclear envelope is a double membrane structure that separates the nucleus from the cytoplasm and regulates the movement of molecules.
Cellular Components
- Free ribosomes are found in the cytoplasm and are responsible for synthesizing proteins that are used within the cell.
- The ribosomes are the site of protein synthesis, where genetic information is converted into proteins.
Test your knowledge about the structures and organelles of eukaryotic cells and their functions. Questions cover components such as nucleus, nucleolus, rough ER, smooth ER, ribosomes, Golgi apparatus, mitochondrion, chloroplast, plasma membrane, cell wall, and more.
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