Biology: Concepts and Investigations
Biology: Concepts and Investigations
3rd Edition
ISBN: 9780077680992
Author: Hoefnagels
Publisher: MCG
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Chapter 17, Problem 1MCQ

A prokaryotic cell is one that

  1. a. lacks DNA.
  2. b. has membrane-bounded organelles.
  3. c. lacks a nucleus.
  4. d. lacks a plasma membrane.
Expert Solution & Answer
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Summary Introduction

Introduction:

A prokaryotic cell is a primitive cell with unbound organelles and genetic material. It makes up the two of the three domains which are Bacteria and Archaea. They have less organelles and lesser specializations.

Answer to Problem 1MCQ

Correct answer:

A prokaryotic cell lacks the nucleus. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

The prokaryotes have a single DNA strand, lacking histones and even a membrane. The DNA is just present in the cytoplasm like other organelles. It is called a nucleoid. The proper double membrane bound nucleus found in eukaryotes is missing in prokaryotes.

Option c. is given as “lacks a nucleus”.

As, “a prokaryotic cell is one that lacks a nucleus”, is the right answer.

Hence, the option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “lacks DNA”.

DNA is the carrier of all the hereditary information. It is present in all the organisms. So, it is a wrong answer.

Option b. is given as “has membrane-bounded organelles”.

A prokaryotic cell does not have any membrane bound organelles. So, it is a wrong answer.

Option d. is given as “lacks a plasma membrane”.

Plasma membrane encloses the cytoplasm of a cell. It is present in all the cells. So, it is a wrong answer.

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

Conclusion

One very distinctive feature between eukaryotes and prokaryotes is the presence and absence of nucleus, respectively.

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Students have asked these similar questions
Prokaryotic and eukaryotic cells possess which of the following? A) a cytoskeleton B) a nuclear envelope C) mitochondria D) a plasma membrane
Which of the following can differentiate prokaryotic cells from eukaryotes (or vice-versa)? A. presence of compartmentalized and membranous organelles B. ribosomal protein synthesis C. location of the genetic material D. cytoskeletal system     B, C, D only     A, B, C, D     A, B, C only     A, C, D only
Which of the following is not true of ALL eukaryotic cells? explain why   A. They have membrane-bound organelles   B. They have chloroplasts    C. They have a nucleus   D. They have a cell membrane

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Biology: Concepts and Investigations

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