Multiple Choice
In humans, what is the average lifespan of a red blood cell (erythrocyte) in circulation?
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1. Overview of Cell Biology
Properties of the Cell
Multiple Choice
Which structures are found in every living cell (both prokaryotic and eukaryotic)?
A
Plasma membrane, cytoplasm, ribosomes, and genetic material (DNA)
B
Nucleus, mitochondria, Golgi apparatus, and endoplasmic reticulum
C
Lysosomes, peroxisomes, centrosomes, and cilia
D
Cell wall, chloroplasts, large central vacuole, and plasmodesmata
Verified step by step guidance1
Step 1: Understand the difference between prokaryotic and eukaryotic cells. Prokaryotic cells are simpler and lack membrane-bound organelles, while eukaryotic cells have complex structures including membrane-bound organelles.
Step 2: Identify structures common to all living cells. These include the plasma membrane, which encloses the cell; cytoplasm, the fluid inside the cell; ribosomes, which synthesize proteins; and genetic material (DNA), which carries the cell's instructions.
Step 3: Recognize that structures like the nucleus, mitochondria, Golgi apparatus, and endoplasmic reticulum are membrane-bound organelles found only in eukaryotic cells, not in prokaryotes.
Step 4: Note that lysosomes, peroxisomes, centrosomes, and cilia are specialized structures mostly found in certain eukaryotic cells and are absent in prokaryotes.
Step 5: Understand that cell walls, chloroplasts, large central vacuoles, and plasmodesmata are features of plant cells (a type of eukaryotic cell) and are not universal to all living cells.
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