SAT Subject Biology Practice Question 454: Answer and Explanation

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Question: 454

4. What structure is common to ALL cell types?

A. Chloroplast
B. Plasma membrane
C. Cell wall
D. Mitochondria
E. Flagella

Correct Answer: B


B All cell types have a plasma membrane. Chloroplasts (choice A) are found only in photosynthetic organisms, cell walls (choice C) are found in plants, bacteria, and fungi only, mitochondria (choice D) are found in all eukaryotic cells but not in prokaryotic cells, and flagella (choice E) is only found on certain cells to aid in their movement, such as sperm cells or paramecia.

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