NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL DIVISION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is chromatin fiber? What does it constitute?
A
Chromatin fiber is a complex of RNA and lipids:the basic structural unit of a chromosome
B
Chromatin fiber is a complex of DNA and histones:the basic structural unit of a chromosome
C
Chromatin fiber is a complex of DNA and lipids:the basic structural unit of a chromosome
D
Chromatin fiber is a complex of RNA and histones:the basic structural unit of a chromosome
Explanation: 

Detailed explanation-1: -Definition. Chromatin refers to a mixture of DNA and proteins that form the chromosomes found in the cells of humans and other higher organisms. Many of the proteins-namely, histones-package the massive amount of DNA in a genome into a highly compact form that can fit in the cell nucleus.

Detailed explanation-2: -Complete Answer:-Chromatin fiber is found in the nucleus of the eukaryotic cells. It is made up of proteins and DNA. Through this combination, thread or string like structure chromosomes are formed. This Chromatin fibers helps in repair of the DNA, replication of DNA or cell division.

Detailed explanation-3: -It is composed of DNA and proteins that condense to form chromosomes. It compresses the DNA structure into a compact unit so that it can fit within the nucleus. The histone proteins organize the DNA into special structures called nucleosomes. The nucleosome further folds to form a chromatin fibre.

Detailed explanation-4: -Chromatin fiber is made up of DNA and histones.

Detailed explanation-5: -Chromatin fibers are coiled and condensed to form chromosomes. Chromatin makes it possible for a number of cell processes to occur including DNA replication, transcription, DNA repair, genetic recombination, and cell division.

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