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Questions and Answers
Where is the supercoiled chromosome located in a bacterial cell?
Where is the supercoiled chromosome located in a bacterial cell?
- Plasmids
- Ribosomes
- Nucleoid (correct)
- Inclusion granules
What is the size of bacterial ribosomes?
What is the size of bacterial ribosomes?
- 70S (correct)
- 80S
- 60S
- 40S
Which structures are the site of protein synthesis in bacteria?
Which structures are the site of protein synthesis in bacteria?
- Transposons
- Ribosomes (correct)
- Plasmids
- Inclusion granules
What are extrachromosomal circular dsDNA molecules capable of independent replication called?
What are extrachromosomal circular dsDNA molecules capable of independent replication called?
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What are pieces of DNA that can readily move from one site to another within or between the DNAs of bacteria, plasmids, or Bacteriophages called?
What are pieces of DNA that can readily move from one site to another within or between the DNAs of bacteria, plasmids, or Bacteriophages called?
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Study Notes
Bacterial Cell Structure
- Supercoiled chromosomes are located in the nucleoid region of a bacterial cell, an area without a membrane-bound nucleus.
- Bacterial ribosomes are 70S in size, composed of a 50S large subunit and a 30S small subunit, essential for protein synthesis.
Protein Synthesis
- Ribosomes in bacteria serve as the site of protein synthesis, facilitating the translation of mRNA into polypeptides.
Extrachromosomal Elements
- Extrachromosomal circular dsDNA molecules that can replicate independently are known as plasmids, playing crucial roles in genetic variability and antibiotic resistance.
Mobile Genetic Elements
- Pieces of DNA that can move between different locations within or between the bacterial genomes, plasmids, or bacteriophages are referred to as transposons or "jumping genes," facilitating genetic recombination and adaptation.
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