Which structure differentiates a eukaryotic cell from a prokaryotic cell?
Correct answer: B. Nucleus
- A. Ribosomes
- B. Nucleus
- C. Cell membrane
- D. Cell wall
Explanation
The defining structural difference between eukaryotic and prokaryotic cells is the presence of a nucleus. Eukaryotic cells have a true nucleus enclosed by a nuclear membrane, which houses their genetic material. In contrast, prokaryotic cells lack a true nucleus and instead have a nucleoid region where their genetic material is located. Additionally, eukaryotic cells contain various membrane-bound organelles, which are absent in prokaryotic cells.Incorrect Options:Ribosomes: Present in both cell types, differing only in size (80S in eukaryotes, 70S in prokaryotes).Cell membrane: Found in both cell types, serving a similar protective role.Cell wall: Found in both cell types but differs in composition and presence.
Last updated
About Cell Structure and Function
Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
Practise Cell Structure and Function
2,478 free Cell Structure and Function MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.