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Questions and Answers
Which cellular structure is responsible for protein synthesis?
Which cellular structure is responsible for protein synthesis?
- Ribosomes (correct)
- Golgi apparatus
- Mitochondria
- Lysosomes
What is the composition of bacterial ribosomes?
What is the composition of bacterial ribosomes?
- 90 S
- 80 S
- 60 S
- 70 S (correct)
Which subunit of bacterial ribosomes is larger?
Which subunit of bacterial ribosomes is larger?
- Both subunits are the same size
- Small subunit (30 S)
- Large subunit (50 S) (correct)
- Bacterial ribosomes do not have subunits
What shape do nuclear bodies typically have?
What shape do nuclear bodies typically have?
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Do nuclear bodies have a nuclear membrane?
Do nuclear bodies have a nuclear membrane?
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How are DNA molecules arranged in nuclear bodies?
How are DNA molecules arranged in nuclear bodies?
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Qual es le structura genetic extrachromosomal que porta un function specifica, como le resistance a antibioticos?
Qual es le structura genetic extrachromosomal que porta un function specifica, como le resistance a antibioticos?
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Qual es le configuration del ADN in le plasmides?
Qual es le configuration del ADN in le plasmides?
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Qual es le composition del ADN in le plasmides?
Qual es le composition del ADN in le plasmides?
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Study Notes
Protein Synthesis in Cells
- Ribosomes are the cellular structures responsible for protein synthesis.
- They serve as the site where messenger RNA (mRNA) is translated into polypeptides.
Bacterial Ribosomes
- Bacterial ribosomes are composed of two subunits, known as the 30S and 50S subunits.
- The larger subunit of bacterial ribosomes is the 50S subunit.
Nuclear Bodies
- Nuclear bodies typically have irregular or spherical shapes.
- They are membrane-less structures found within the nucleus.
Nuclear Membrane and DNA Arrangement
- Nuclear bodies do not have a nuclear membrane surrounding them.
- DNA molecules within nuclear bodies are arranged in a less structured, more fluid form, facilitating various regulatory processes.
Extrachromosomal Genetic Structures
- Plasmids are extrachromosomal genetic structures that carry specific functions, such as antibiotic resistance.
- They are circular DNA molecules that replicate independently of chromosomal DNA.
Composition and DNA Configuration of Plasmids
- Plasmids contain double-stranded DNA that can vary in size and carry genes beneficial for survival.
- The DNA in plasmids is usually circular, allowing for efficient replication and maintenance within the bacterial cell.
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