Final answer:
Chromosomes are long strands of DNA wrapped around proteins, found in the cell nucleus, and contain hundreds to thousands of genes that carry genetic instructions. The option (A) is correct.
Step-by-step explanation:
The condensed, single, very long strands of DNA double helix located in the nucleus of a cell and containing hundreds of genes are called chromosomes. Inside the nucleus of eukaryotic cells, chromosomes are the structures that hold the coiled-up DNA wrapped around proteins.
Human cells, for instance, have 46 chromosomes, which are only readily visible when the cell is preparing to divide. Each chromosome can carry hundreds to thousands of genes, which contain the genetic instructions for building and maintaining an organism. Therefore, option (A) is correct.
This question is not complete, Here I am attaching the complete question:
Condensed, single, very long strands of DNA double helix located in the nucleus of a cell and containing hundred of genes called_________.
A) Chromosomes
B) Nucleotides
C) Ribosomes
D) Mitochondria