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Questions and Answers
What is the functional component of DNA?
Where does DNA replication occur in eukaryotic cells?
What is the most condensed form of DNA?
In which phase of the cell cycle does DNA replication occur?
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Where are histones present in eukaryotic cells?
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What is the Gap between DNA replication and cell division?
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Which of the following statements is true about the cell cycle?
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In what phase of the cell cycle is DNA decondensed for replication?
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Study Notes
Cell Cycle and DNA Replication
Functional Components of DNA
- Chromatin, chromosome, and gene are all functional components of DNA.
DNA Replication
- DNA replication occurs in S-phase in eukaryotic cells.
- DNA replication occurs in E. coli and yeast.
- DNA replication does not occur in the cytoplasm of RBCs.
Cell Division
- Cell division occurs in some cells, but not all cells.
- Cell division occurs in bacterial cells, but not in viruses.
DNA Structure
- In normal eukaryotic cells, like muscle cells, DNA is present in the form of chromatin.
- Histones are present in chromatin and chromosomes.
- Heterochromatin is the most condensed form of DNA.
DNA Condensation
- DNA gets decondensed for replication and transcription.
S-I and S-II Genes
- S-I DNA is present in both prokaryotic and eukaryotic cells.
- S-II genes are present in prokaryotic and eukaryotic cells.
- Euchromatin is transcriptionally active, while chromosomes are not.
Cell Cycle Phases
- S-phase is absent in Nostoc.
- DNA replication is absent in none of the cells mentioned.
- Chromatin is absent in E. coli.
- DNA replication in human cells occurs in the S-phase.
- G2 is the gap between DNA replication and cell division.
- Interphase involves G1, S-phase, and G2 phase, but not M-phase.
Cell Cycle Control
- The cell cycle is under genetic control and is a coordinated event.
- The cell cycle occurs in eukaryotes, but not in prokaryotes.
- DNA replication in yeast occurs in the S-phase.
- Most changes occur in the S-phase during the cell cycle.
- Chromosomes appear in the M-phase in E. coli.
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Description
Test your knowledge of DNA, cells, and molecular biology with this quiz. Questions cover DNA replication, cell division, and the structure of DNA.
