BIOMOLECULES AND ENZYMES

Detailed explanation-1: -The DNA molecules found in mitochondria and chloroplasts are small and circular, much like the DNA of a typical bacterium. There are usually many copies of DNA in a single mitochondrion or chloroplasts.

Detailed explanation-2: -Ring-shaped electron-translucent regions in the chloroplast contain chloroplast DNA. The DNA is distributed along this ring in an uneven fashion and, when stained, resembles a string of beads. Each plastid has I ring, and the ring is unbroken in the intact plastid.

Detailed explanation-3: -Mitochondria and chloroplasts have striking similarities to bacteria cells. They have their own DNA, which is separate from the DNA found in the nucleus of the cell. And both organelles use their DNA to produce many proteins and enzymes required for their function.

Detailed explanation-4: -Mitochondrial DNA is the circular chromosome found inside the cellular organelles called mitochondria.

Detailed explanation-5: -Chloroplast DNAs are circular, and are typically 120, 000–170, 000 base pairs long. They can have a contour length of around 30–60 micrometers, and have a mass of about 80–130 million daltons.