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WorksheetsQuá trình tái bản DNA
Total questions: 10
Worksheet time: 6mins
What is the process of DNA replication?
(a)
Which enzymes are primarily involved in DNA replication?
(a)
Explain the semi-conservative model of DNA replication.
Each new DNA molecule has two original strands.
In this model, both strands are newly synthesized.
In semi-conservative DNA replication, each new DNA molecule contains one original strand and one new strand.
DNA replication involves only new strands being formed.
What are the main steps involved in DNA replication?
The main steps include activation, separation, and completion.
The main steps are synthesis, repair, and division.
The main steps involved in DNA replication are initiation, elongation, and termination.
The main steps consist of initiation, modification, and replication.
How is DNA replication controlled within a cell?
DNA replication is solely dependent on the presence of nucleotides and enzymes.
DNA replication is controlled by regulatory proteins, cell cycle checkpoints, and replication origins.
DNA replication is regulated by environmental factors and nutrient availability.
DNA replication is initiated by RNA polymerase and transcription factors.
What role does DNA polymerase play in replication?
DNA polymerase synthesizes new DNA strands and ensures accuracy during replication.
DNA polymerase transports nucleotides to the replication site.
DNA polymerase repairs damaged DNA strands during replication.
DNA polymerase unwinds the DNA helix before replication.
Describe the function of helicase in the replication process.
Helicase repairs damaged DNA by sealing breaks in the strands.
Helicase unwinds the DNA double helix by breaking hydrogen bonds between base pairs.
Helicase synthesizes new DNA strands from RNA primers.
Helicase stabilizes the DNA strands during replication.
What is the significance of the replication fork?
The replication fork is a site for protein synthesis during cell division.
The replication fork helps in the repair of damaged DNA strands.
The replication fork is involved in the transcription of RNA from DNA.
The replication fork is crucial for DNA replication as it facilitates the synthesis of new DNA strands.
How do leading and lagging strands differ during replication?
The leading strand is synthesized continuously, while the lagging strand is synthesized in short, discontinuous segments.
The leading strand is synthesized in short, discontinuous segments, while the lagging strand is continuous.
The leading strand is synthesized in a 3' to 5' direction, while the lagging strand is 5' to 3'.
Both strands are synthesized continuously without any interruptions during replication.
What mechanisms ensure the accuracy of DNA replication?
DNA replication is solely dependent on RNA primers.
Only the presence of nucleotides affects replication accuracy.
DNA replication accuracy is guaranteed by random chance.
Mechanisms include base pairing fidelity, proofreading by DNA polymerase, mismatch repair systems, and cell cycle checkpoints.
