Structure (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
What are nucleotides in relation to nucleic acids?
What are nucleotides in relation to nucleic acids?
Building blocks that link together
Which three components make up every DNA nucleotide?
Which three components make up every DNA nucleotide?
Phosphate, deoxyribose, base
Which base is found in DNA but NOT in RNA?
Which base is found in DNA but NOT in RNA?
Thymine
In DNA, which base always pairs with adenine?
In DNA, which base always pairs with adenine?
Thymine
How many hydrogen bonds hold guanine and cytosine together in DNA?
How many hydrogen bonds hold guanine and cytosine together in DNA?
3
If a DNA strand has the sequence A-G-C-T, what is the complementary strand?
If a DNA strand has the sequence A-G-C-T, what is the complementary strand?
T-C-G-A
What forms the 'rungs of the ladder' in the DNA double helix structure?
What forms the 'rungs of the ladder' in the DNA double helix structure?
Paired bases
Which base does adenine pair with in RNA?
Which base does adenine pair with in RNA?
Uracil
What is the key difference between ribose and deoxyribose sugars?
What is the key difference between ribose and deoxyribose sugars?
Ribose has an extra -OH group
How does DNA structure differ from RNA structure?
How does DNA structure differ from RNA structure?
DNA is double-stranded, RNA single
What percentage of a chromosome is DNA?
What percentage of a chromosome is DNA?
40%
How many chromosomes do humans have?
How many chromosomes do humans have?
46