Multiple Choice
In eukaryotic cells, which membrane-enclosed organelle is primarily responsible for the synthesis of most lipids, including phospholipids and steroid hormones?
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13. Intracellular Protein Transport
Membrane Enclosed Organelles
Multiple Choice
Which of the following is NOT a membrane-enclosed (membranous) organelle in a eukaryotic cell?
A
Mitochondrion
B
Ribosome
C
Golgi apparatus
D
Lysosome
Verified step by step guidance1
Step 1: Understand what a membrane-enclosed (membranous) organelle is. These organelles are surrounded by a lipid bilayer membrane, which separates their internal environment from the cytoplasm.
Step 2: Review the list of organelles given: Mitochondrion, Ribosome, Golgi apparatus, and Lysosome.
Step 3: Recall that mitochondria, Golgi apparatus, and lysosomes all have membranes surrounding them, making them membranous organelles.
Step 4: Recognize that ribosomes are not surrounded by a membrane; they are complexes of RNA and protein that float freely in the cytoplasm or attach to the rough endoplasmic reticulum.
Step 5: Conclude that the ribosome is the organelle in the list that is NOT membrane-enclosed.
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