What is the structure of the supercoiled bacterial chromosome?

What will be an ideal response?


Ans: The supercoiled bacterial chromosome has several hundred domains, each of which is a loop of DNA with a length of 10 to 40 kb and is secured at its base. The supercoiling within a domain may be either constrained (due to protein interactions) or unconstrained (a result of tension in free DNA); empirical evidence suggests that it is primarily unconstrained.

Biology & Microbiology

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Polypeptides (proteins) are composed of amino acids as ________ are composed of DNA.

A. genes B. RNA C. proteomes D. lipids E. metabolites

Biology & Microbiology

Which of the following is the strongest

evidence for the idea that present-day eukaryotic aerobes are the descendants of the successful symbiotic association of anaerobes and aerobes? a. Mitochondria can produce ATP. b. A mitochondrion can survive indefinitely when removed from a eukaryotic cell. c. A mitochondrion has its own set of DNA molecules. d. Fossilized mitochondria are older than the oldest fossilized eukaryotes. e. All eukaryotic cells have mitochondria

Biology & Microbiology

"Jumping genes" that have the ability to move within and between chromosomes are called

A. oncogenes. B. transposons. C. introns. D. retroviruses. E. exons.

Biology & Microbiology

Which of the following terms refers to both the movement of a ribosome along a piece of mRNA and the movement of a piece of one chromosome to another chromosome

A. Transduction B. Transgenesis C. Transformation D. Translocation E. Transplantation

Biology & Microbiology