GENERAL HISTOLOGY

INTRODUCTION

CELL STRUCTURE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Where is the DNA found in a prokaryotic cell?
A
Inside the nucleus
B
Floating around in the cytoplasm
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Prokaryotic cells, such as bacteria, have a free-floating chromosome that is usually circular and is not enclosed in a nuclear membrane . Instead, the DNA simply exists in a region of the cell called the nucleoid.

Detailed explanation-2: -The nucleus (plural, nuclei) houses the cell’s genetic material, or DNA, and is also the site of synthesis for ribosomes, the cellular machines that assemble proteins.

Detailed explanation-3: -DNA inside bacterial cells is stored differently than DNA inside plant and animal cells. In bacterial cells, genetic material is usually clustered together in a region called the nucleoid, which floats in the cytoplasm.

Detailed explanation-4: -Eukaryotic cells are more complex than prokaryotic cells. They all have a cell membrane, ribosomes, and DNA as prokaryotic cells do. However, the DNA of eukaryotic cells does not float freely in the cytoplasm. Instead, it is found in the nucleus, an internal compartment bound by a cell membrane.

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