Question

The DNA of every eukaryotic cell is stored in one or more located in the . 2. Chromosomes contain most of the cell's which acts as the molecule of heredity. 3. A duplicated chromosome remains tightly paired with its partner at a region called the . 4. Before a cell divides, it copies all of its chromosomes. While the two copies of a chromosome are attached they are called . 5. DNA and protein together form a complex called .

Answer 1

Answer:

1. The DNA of every eukaryotic cell is stored in one or more CHROMOSOMES located in the NUCLEUS

2. Chromosomes contain most of the cell's DNA which acts as the molecule of heredity.  

3. A duplicated chromosome remains tightly paired with its partner at a region called the CENTROMERE .

4. Before a cell divides, it copies all of its chromosomes. While the two copies of a chromosome are attached they are called SISTER CHROMATIDS.

5. DNA and protein together form a complex called CHROMATIN.

Explanation:

Chromosomes are the structures present in the nucleus of the cells and become visible during stages of cell division. Chromosomes carry genes in linear order. Chromosomes are composed of thin threads of chromatin which in turn is made of DNA and its packing proteins. Condensation of chromatin during cell division makes the chromosomes visible.

DNA is a nucleic acid and serves to store genetic information. Stretch of DNA that codes for a specific protein is called a gene. Genes regulate the genetic traits of organisms.

DNA replication occurs during the S phase of the cell cycle. The replicated DNA is accommodated in sister chromatids of chromosomes. Before the S phase, each chromosome has one chromatid and after the S phase, each of the chromosomes has two sister chromatids that are held together at the centromere. Therefore, each of the two identical halves of a duplicated chromosome is called sister chromatid.