NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Define chromosomes.
A
Two identical copies of the same chromosome formed by DNA replication, attached to each other by a structure called the centromere.
B
The cytoskeletal structure of eukaryotic cells that forms during cell division to separate sister chromatids between daughter cells.
C
A thread-like structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
D
A chromosome that has been newly copied, but they are both still joined together.
Explanation: 

Detailed explanation-1: -In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

Detailed explanation-2: -Term / Chromosome A threadlike structure of DNA and proteins found in the nucleus of a cell that carries genetic information in the form of genes. Humans have 46 chromosomes per nucleus.

Detailed explanation-3: -A structure found inside the nucleus of a cell. A chromosome is made up of proteins and DNA organized into genes.

Detailed explanation-4: -Structure of DNA. Most DNA is found inside the nucleus of a cell, where it forms the chromosomes. Chromosomes have proteins called histones that bind to DNA. DNA has two strands that twist into the shape of a spiral ladder called a helix.

Detailed explanation-5: -Deoxyribonucleic acid (abbreviated DNA) is the molecule that carries genetic information for the development and functioning of an organism. DNA is made of two linked strands that wind around each other to resemble a twisted ladder-a shape known as a double helix.

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