NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL DIVISION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What structure is found in prokaryotic cells, but not in eukaryotic cells?
A
a singular, circular chromosome
B
a chromosome wrapped around many histones
C
a chromosome found in the nucleus
D
mitotic spindle (spindle fibers)
Explanation: 

Detailed explanation-1: -By definition, prokaryotes lack a membrane-bound nucleus to hold their chromosomes. Instead, the chromosome of a prokaryote is found in a part of the cytoplasm called a nucleoid. Prokaryotes generally have a single circular chromosome that occupies a region of the cytoplasm called a nucleoid.

Detailed explanation-2: -The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not.

Detailed explanation-3: -In prokaryotes, the circular chromosome is contained in the cytoplasm in an area called the nucleoid. In contrast, in eukaryotes, all of the cell’s chromosomes are stored inside a structure called the nucleus. Each eukaryotic chromosome is composed of DNA coiled and condensed around nuclear proteins called histones.

Detailed explanation-4: -Prokaryotes have a single circular chromosome while eukaryotes have linear chromosomes.

There is 1 question to complete.