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.
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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
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
"Jumping genes" that have the ability to move within and between chromosomes are called
A. oncogenes. B. transposons. C. introns. D. retroviruses. E. exons.
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