Lesson 2.1.3a
2.1.3a Nucleotides, ATP and DNA structure Quiz: OCR Biology, Unit 1
20 questions
In partnership with Revision Ninja
Lesson 2.1.3a, Nucleotides, ATP and DNA structure: 20 multiple choice questions for the OCR Biology (H020), Unit 1: Foundations in biology, written with Revision Ninja.
Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.
The 20 questions
-
What three chemical components form a standard nucleotide?
- Sugar, base, phosphate
- Sugar, acid, base
- Sugar, protein, phosphate
- Base, lipid, phosphate
-
Which pair of bases are purines?
- Cytosine and thymine
- Thymine and uracil
- Adenine and guanine
- Uracil and cytosine
-
Which pentose sugar is found in RNA nucleotides?
- Glucose
- Deoxyribose
- Ribose
- Fructose
-
ATP is made of ribose, adenine and:
- A single glycerol
- One amino acid
- Two fatty acids
- Three phosphate groups
-
In DNA, which base pairs with adenine?
- Cytosine
- Guanine
- Thymine
- Uracil
-
Which bond joins nucleotides into a polynucleotide chain?
- Glycosidic bond
- Hydrogen bond
- Peptide bond
- Phosphodiester bond
-
How are the two strands arranged in a DNA molecule?
- Perpendicular
- Antiparallel
- Intertwined
- Parallel
-
How many hydrogen bonds form between adenine and thymine?
- 2
- 3
- 4
- 1
-
A DNA sample has 30% adenine. What percentage is cytosine?
- 40%
- 20%
- 30%
- 70%
-
Which reaction breaks a phosphodiester bond in a polynucleotide?
- Phosphorylation
- Dehydration
- Hydrolysis
- Condensation
-
What chemical reaction releases energy from ATP?
- Hydrolysis
- Deamination
- Oxidation
- Condensation
-
A DNA molecule has 1000 base pairs. How many nucleotides does it contain in total?
- 4000
- 500
- 2000
- 1000
-
Which feature of DNA ensures its precise replication?
- Complementary base pairing
- Hydrogen bonding
- Phosphodiester backbone
- Ribose sugars
-
What is the primary function of the DNA double helix?
- Synthesising proteins
- Protecting genetic bases
- Catalysing reactions
- Transporting amino acids
-
Which sugar is found in RNA nucleotides?
- Glucose
- Ribose
- Fructose
- Deoxyribose
-
Why is cold ethanol added during DNA extraction?
- To precipitate DNA
- To denature enzymes
- To buffer solution
- To hydrolyse proteins
-
A DNA molecule has 18% thymine. Which set of base percentages is correct?
- Adenine 32%, cytosine 18%, guanine 32%
- Adenine 18%, cytosine 32%, guanine 32%
- Adenine 36%, cytosine 14%, guanine 14%
- Adenine 18%, cytosine 18%, guanine 32%
-
Why is ATP well-suited as an immediate energy currency?
- Stable permanent storage
- Rapid bond hydrolysis
- Insoluble in water
- High molecular weight
-
In double-stranded DNA, why does the amount of adenine equal thymine?
- Complementary base pairing
- Random association
- Identical sugar rings
- Equal phosphate content
-
Which structural feature of the sugar-phosphate backbone gives DNA strands their direction?
- 5' to 3' polarity
- Double helix twist
- Base pair stacking
- Hydrogen bonding
Related quizzes
- Microscopy and observing cells Quiz · 2.1.1a · 20 questions
- Ultrastructure and organelles of eukaryotic cells Quiz · 2.1.1b · 20 questions
- Water and carbohydrates Quiz · 2.1.2a · 20 questions
- Lipids, amino acids and proteins Quiz · 2.1.2b · 20 questions
- Inorganic ions and biochemical analysis Quiz · 2.1.2c · 20 questions
- DNA replication, genetic code and protein synthesis Quiz · 2.1.3b · 20 questions
- Enzyme action and factors affecting rate Quiz · 2.1.4a · 20 questions
- Coenzymes, cofactors and enzyme inhibitors Quiz · 2.1.4b · 20 questions
- Membrane structure and roles Quiz · 2.1.5a · 20 questions
- Movement of molecules across membranes Quiz · 2.1.5b · 20 questions