How do you treat an infection caused by antibiotic-resistant bacteria? â¢Use newer antibiotics (2nd / 3rd / 4th generation) or be very cleverâ¦ What happens to bacteria if the cell wall is damaged? â¢ Gram + bacteria: protoplasts â¢ Gram â bacteria: spheroplasts By any name, these cells are highly sensitive to osmotic pressure and will
Share. By Regina Bailey. Definition: A chromosome is a long, stringy aggregate of genes that carries heredity information (DNA) and is formed from condensed chromatin. A non-duplicated chromosome is single-stranded and is comprised of a centromere region that connects two arm regions.y Regina Bailey. Definition: A chromosome is a long, stringy aggregate of genes that carries heredity information (DNA) and is formed from condensed chromatin.
What is a chromosome? 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. Chromosomes are not visible in the cellâs nucleusânot even under a microscopeâwhen the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.