Chapter 3, Problem 1SQ

Summary Introduction

Concept introduction: Eukaryotes belong to the domain Eukarya or Eukaryota. The eukaryotic cells have a nucleus enclosed within a membrane. They have various membrane bound organelles present in them. Eukaryotes have the ability to reproduce both sexually and asexually.

Answer to Problem 1SQ

Correct answer: In contrast to the average prokaryotic cells, eukaryotic cells have many different types of internal compartments. Therefore, option b. is correct.

Explanation of Solution

Reason for the correct statement:

In addition to the nucleus, the eukaryotic cell has various internal compartments that are not present in the prokaryotes. The eukaryotic cell contains various organelles like mitochondria, chloroplasts, Golgi apparatus, endoplasmic reticulum and lysosomes.

Option b. is given as “have many different types of internal compartments”. As the eukaryotic cells have many different types of internal compartments compare to the prokaryotes option b. is correct.

Reasons for the incorrect statement:

Option a. is given as “have no nucleus”. Eukaryotic cells possess a well-defined nucleus. So, option a. is incorrect.

Option c. is given as “have ribosomes in their plasma membrane”. Ribosomes are present in both prokaryotes and eukaryotes. They are found free in the cytoplasm or can be seen bound to the endoplasmic reticulum. So option c. is incorrect.

Option d. is given as “lack a plasma membrane”. Both prokaryotic cell and eukaryotic cell are surrounded by a plasma membrane. So, option d. is incorrect.

Hence, options a., c., and d. are incorrect.

Conclusion

Eukaryotic cells have various types of internal compartments that are not present in the prokaryotes.