DNA - Deoxyribose Nucleic Acid (Edexcel GCSE Biology): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What structure does DNA form when two strands twist around each other?
What structure does DNA form when two strands twist around each other?
Double helix
How many components make up each nucleotide in DNA?
How many components make up each nucleotide in DNA?
Three
Which nitrogenous base pairs with adenine in DNA?
Which nitrogenous base pairs with adenine in DNA?
Thymine
How many hydrogen bonds hold cytosine and guanine together?
How many hydrogen bonds hold cytosine and guanine together?
3 bonds
How many bases make up one codon?
How many bases make up one codon?
Three
How many different types of amino acids are there?
How many different types of amino acids are there?
20
What are the two main stages of protein synthesis?
What are the two main stages of protein synthesis?
Transcription and translation
During transcription, which molecule is formed from the DNA template?
During transcription, which molecule is formed from the DNA template?
mRNA
Where does translation occur in the cell?
Where does translation occur in the cell?
At the ribosome in the cytoplasm
What type of mutation involves adding an extra base to the DNA sequence?
What type of mutation involves adding an extra base to the DNA sequence?
Insertion
What is the main role of non-coding DNA?
What is the main role of non-coding DNA?
Regulating gene expression
What is the genome?
What is the genome?
All genes coding for all proteins