DNA Replication (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
During which phase of the cell cycle does DNA replication occur?
During which phase of the cell cycle does DNA replication occur?
Interphase
Where in the cell does DNA replication take place?
Where in the cell does DNA replication take place?
Nucleus
What is the state of chromosomes immediately after mitosis ends?
What is the state of chromosomes immediately after mitosis ends?
Single-stranded
What does DNA replication ensure happens to chromosomes?
What does DNA replication ensure happens to chromosomes?
They become double-stranded
What is the first step in the mechanism of DNA replication?
What is the first step in the mechanism of DNA replication?
The double helix unwinds
What breaks the hydrogen bonds between complementary bases during DNA replication?
What breaks the hydrogen bonds between complementary bases during DNA replication?
An enzyme
In DNA replication, which base does adenine (A) pair with?
In DNA replication, which base does adenine (A) pair with?
Thymine (T)
In DNA replication, which base does cytosine (C) pair with?
In DNA replication, which base does cytosine (C) pair with?
Guanine (G)
What is the role of DNA polymerase in DNA replication?
What is the role of DNA polymerase in DNA replication?
Joins nucleotides to assemble new strands
What type of enzyme is DNA polymerase?
What type of enzyme is DNA polymerase?
Anabolic
What is the composition of each newly formed DNA strand after replication?
What is the composition of each newly formed DNA strand after replication?
Half old DNA and half new DNA
Why are occasional mistakes (mutations) during DNA replication important?
Why are occasional mistakes (mutations) during DNA replication important?
Allow for variation essential for evolution