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Prokaryote Reproduction and Gene Exchange exam Flashcards

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Prokaryote Reproduction and Gene Exchange exam
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  • Binary Fission


    Asexual reproduction in prokaryotes resulting in two identical daughter cells.

  • What is the exponential phase in bacterial growth?


    A period where bacteria grow at an exponential rate due to optimal conditions and nutrients.

  • Mutation Rate in Prokaryotes


    High mutation rates due to short generation times and large populations, leading to genetic variation.

  • Transformation


    Process where a prokaryote takes up external DNA from its environment and incorporates it into its genome.

  • What is transduction?


    The transfer of DNA from one bacterium to another via a virus.

  • Conjugation


    Direct transfer of genetic material between two physically connected prokaryotic cells via a pilus.

  • F Plasmid


    A plasmid that carries genes required for the formation of a pilus and gene transfer during conjugation.

  • What is an R plasmid?


    A plasmid that carries genes conferring antibiotic resistance.

  • Exponential Growth


    Rapid increase in bacterial population when conditions are optimal.

  • What is the role of a pilus in conjugation?


    A pilus connects two bacterial cells, allowing the transfer of genetic material.

  • Genetic Variation in Prokaryotes


    Achieved through mutation, transformation, transduction, and conjugation.

  • What is the F factor?


    A genetic element that includes the F plasmid and genes incorporated into the bacterial chromosome.

  • Antibiotic Resistance


    The ability of bacteria to survive and proliferate despite the presence of antibiotics, often due to R plasmids.

  • What is the significance of short generation times in bacteria?


    They contribute to high mutation rates and rapid evolution.

  • Transfection


    The process of introducing DNA into eukaryotic cells via a virus.

  • What happens during the stationary phase of bacterial growth?


    Bacterial growth levels off due to nutrient depletion or space limitations.

  • Bacteriophage


    A virus that infects bacteria and can transfer DNA between bacterial cells.

  • What is the role of a donor cell in conjugation?


    A cell that possesses the F factor and transfers genetic material to a recipient cell.

  • Plasmid


    A small, circular piece of DNA in bacteria that can replicate independently of chromosomal DNA.

  • What is the significance of genetic exchange in prokaryotes?


    It enhances genetic diversity, aiding in adaptation and evolution.

  • Exogenous DNA


    DNA that originates outside the cell and can be incorporated into the cell's genome.

  • What is the difference between F+ and F- bacteria?


    F+ bacteria have the F plasmid, while F- bacteria lack it and act as recipients in conjugation.

  • Vector


    An agent, such as a virus, that transfers genetic material from one organism to another.

  • What is the role of a recipient cell in conjugation?


    A cell that lacks the F factor and receives genetic material from a donor cell.

  • Chromosomal DNA


    The main genetic material in a cell, containing most of the organism's genes.

  • What is the role of bacteriophages in transduction?


    They transfer DNA from one bacterial cell to another, introducing genetic variation.

  • Generation Time


    The time it takes for a bacterial population to double in number.

  • What is the significance of the F prime bacteria?


    Bacteria with the F factor incorporated into their chromosomal DNA, capable of gene transfer.

  • Capsid


    The protein shell of a virus that encases its genetic material.