Which structure is not present in prokaryotic cells?

Prepare for the Foundations of Biology Exam 1. Dive into key biological concepts with multiple choice questions, hints, and explanations. Ace the exam with our efficient study methods!

Multiple Choice

Which structure is not present in prokaryotic cells?

Explanation:
Prokaryotic cells lack a membrane-bound nucleus. Their DNA sits in the cytoplasm in a region called the nucleoid, not inside a nucleus. This distinguishes them from eukaryotic cells, which house their genetic material inside a true nucleus surrounded by a double membrane. Prokaryotes still have a plasma membrane to enclose the cell, and many have pili or flagella for movement or attachment, and some possess an outer membrane as part of their cell envelope. So the structure that prokaryotes do not have is a nucleus.

Prokaryotic cells lack a membrane-bound nucleus. Their DNA sits in the cytoplasm in a region called the nucleoid, not inside a nucleus. This distinguishes them from eukaryotic cells, which house their genetic material inside a true nucleus surrounded by a double membrane. Prokaryotes still have a plasma membrane to enclose the cell, and many have pili or flagella for movement or attachment, and some possess an outer membrane as part of their cell envelope. So the structure that prokaryotes do not have is a nucleus.

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