Chromosomes are made up of a DNA-protein complex called chromatin that is organized into subunits called nucleosomes. The way in which eukaryotes compact and arrange their chromatin not only allows a large amount of DNA to fit in a small space, but it also helps regulate gene expression.
What are chromosomes made up of Class 9?
Each chromosome is made up of two components (i) Deoxyribonucleic acid (DNA) (ii) Proteins (e.g.; his tones and acidic proteins) These consist of two (unreplicated) or four (duplicated) arms and a primary constriction or centromere which gives them a particular shape due to its position.
What are chromosomes made up of Class 11?
Complete answer: A chromosome made up of DNA and histones.
What are chromosomes made of Class 8?
Chromosomes are thread-like structures woven together. Each chromosome is made of proteins and a single molecule of deoxyribonucleic acid (DNA). Chromosomes have been defined as bundles of tightly coiled DNA located within the nucleus of almost every cell in our body.
What are the 4 types of chromosomes?
On the basis of the location of the centromere, chromosomes are classified into four types: metacentric, submetacentric, acrocentric, and telocentric.
How many genes are in a chromosome?
Chromosome 1 likely contains 2,000 to 2,100 genes that provide instructions for making proteins.
What is cell wall Class 9?
Hint: A cell wall is a structural layer that surrounds some types of cells just outside the cell membrane. It can be tough, flexible, and even rigid at times. … Cell walls are present in most prokaryotes (except mollicute bacteria), algae, fungi, and eukaryotes, including plants, but are absent in animals.
What is the main function of chromosomes?
Chromosomes carry the basic genetic material DNA which is responsible to provide hereditary characteristics and genetic information to the various cells. The cellular functions are important for the growth and survival of living organisms.