NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL DIVISION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In eukaryotic cells, DNA is separated into linear pieces called ____
A
Chromosomes
B
Chromotids
C
Chromotins
D
Sister Chromotids
Explanation: 

Detailed explanation-1: -Eukaryote DNA is divided into linear pieces called chromosomes (unlike bacterial DNA, which forms loops). In the non-dividing phase of a eukaryotic cell’s life cycle, known as interphase, the chromosomes are uncoiled.

Detailed explanation-2: -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-3: -Since eukaryotic cells typically have multiple linear chromosomes, capped with telomeres, eukaryotic DNA replication and cell division (mitosis and meiosis) are a bit more complicated. In eukaryotic cells, DNA replication occurs before mitosis begins, and it can’t occur while the cell is dividing.

Detailed explanation-4: -Eukaryotic chromosomes consist of a DNA-protein complex that is organized in a compact manner which permits the large amount of DNA to be stored in the nucleus of the cell. The subunit designation of the chromosome is chromatin. The fundamental unit of chromatin is the nucleosome.

Detailed explanation-5: -In eukaryotes, the cell’s genetic material, or DNA, is contained within an organelle called the nucleus, where it is organized in long molecules called chromosomes.

There is 1 question to complete.