Podcast
Questions and Answers
Where are lipids synthesized in the cell?
Where are lipids synthesized in the cell?
- Golgi apparatus
- Smooth endoplasmic reticulum (correct)
- Rough endoplasmic reticulum
- Cytosolic ribosomes
What initiates the synthesis of all proteins in a cell?
What initiates the synthesis of all proteins in a cell?
- Cytosolic ribosomes (correct)
- Smooth endoplasmic reticulum
- Rough endoplasmic reticulum
- Golgi apparatus
What is the role of the signal sequence in transmembrane proteins?
What is the role of the signal sequence in transmembrane proteins?
- To complete protein synthesis in the cytosol
- To halt translation and direct the ribosome to the ER (correct)
- To direct the ribosome to the mitochondria
- To ensure proteins are synthesized in the nucleus
What happens to cytosolic proteins after their synthesis is completed?
What happens to cytosolic proteins after their synthesis is completed?
After docking with the ER, what continues for transmembrane proteins?
After docking with the ER, what continues for transmembrane proteins?
Which cellular structure is primarily involved in the synthesis of lipids?
Which cellular structure is primarily involved in the synthesis of lipids?
What happens after the ribosome docks with the endoplasmic reticulum (ER) during the synthesis of transmembrane proteins?
What happens after the ribosome docks with the endoplasmic reticulum (ER) during the synthesis of transmembrane proteins?
Which statement correctly describes the synthesis of cytosolic proteins?
Which statement correctly describes the synthesis of cytosolic proteins?
What is the function of the signal sequence in transmembrane proteins?
What is the function of the signal sequence in transmembrane proteins?
Where does the synthesis of transmembrane proteins begin?
Where does the synthesis of transmembrane proteins begin?
Flashcards
Membrane Component Synthesis Location
Membrane Component Synthesis Location
Lipids and proteins are synthesized in the endoplasmic reticulum (ER).
Lipid Synthesis Location
Lipid Synthesis Location
Lipids are synthesized in the smooth ER (SER).
Protein Synthesis Start Spot
Protein Synthesis Start Spot
Protein synthesis begins on cytosolic ribosomes.
Cytosolic Protein Fate
Cytosolic Protein Fate
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Transmembrane Protein ER Targeting
Transmembrane Protein ER Targeting
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ER Protein Synthesis
ER Protein Synthesis
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Lipid Synthesis Location
Lipid Synthesis Location
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Signal Sequence
Signal Sequence
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Transmembrane Protein Targeting
Transmembrane Protein Targeting
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Cytosolic protein fate
Cytosolic protein fate
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Study Notes
Synthesis of Membrane Components
- Lipids and proteins are synthesized in the endoplasmic reticulum (ER)
- Lipids are synthesized in the smooth endoplasmic reticulum (SER) and inserted into its membrane
- All proteins start synthesis in cytosolic ribosomes
- Cytosolic proteins are finished and remain in the cytosol
Cells and Proteins
- Transmembrane proteins have a signal sequence
- This signal sequence stops translation and directs the ribosome to the ER, creating rough ER (RER)
- Translation continues after docking, inserting the protein into the ER membrane
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