Lesson 3.3.13.2
3.3.13.2 Proteins Quiz: AQA Chemistry, Unit 3
20 questions
In partnership with Revision Ninja
Lesson 3.3.13.2, Proteins: 20 multiple choice questions for the AQA Chemistry (7405), Unit 3: Organic chemistry, 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 links amino acids together in a protein?
- Peptide links
- Disulfide links only
- Glycosidic links
- Ester links
-
What is the structure of a peptide link?
- -CONH-
- -SO2-
- -CH2-
- -COO-
-
What describes the primary structure of a protein molecule?
- 3D folded shape
- Alpha-helix shape
- Beta-pleated sheet
- Amino acid sequence
-
Which type of bond maintains the secondary structure of a protein?
- Peptide bond
- Hydrogen bond
- Disulfide bond
- Ionic bond
-
Which covalent bond helps maintain the tertiary structure of a protein?
- Peptide bonds
- Disulfide bonds
- Ester bonds
- Glycosidic bonds
-
What products are formed by the complete hydrolysis of a protein?
- Amino acids
- Polypeptides
- Dipeptides
- Carboxylic acids
-
How many amino acid molecules are produced when one dipeptide molecule is completely hydrolysed?
- One
- Three
- Four
- Two
-
How many peptide links are present in a tripeptide?
- 3
- 1
- 2
- 4
-
What is the Rf value when a spot moves 3.0 cm and the solvent front moves 6.0 cm?
- 2.0
- 0.33
- 1.0
- 0.5
-
Which developing agent is used to make colourless amino acids visible on a TLC plate?
- Fehling's solution
- Bromine water
- Ninhydrin
- Silver nitrate solution
-
Which factor stays constant for a specific amino acid only if TLC conditions are identical?
- Molar mass
- Melting point
- Rf value
- Retention time
-
Which level of protein structure is directly altered by changing a single amino acid?
- Secondary structure
- Quaternary structure
- Tertiary structure
- Primary structure
-
Which type of interaction maintains the secondary structure of a protein?
- Covalent bonds
- Ionic bonds
- Hydrogen bonds
- Disulfide links
-
How many amino acids are released by complete hydrolysis of a tripeptide made of three different amino acids?
- 1
- 2
- 3
- 6
-
Which developing agent is commonly used to locate amino acids on a chromatogram?
- Benedict's reagent
- Ninhydrin
- Tollens' reagent
- Iodine vapour
-
A spot moves 6.0 cm while the solvent front moves 8.0 cm. What is the Rf value?
- 0.25
- 1.33
- 0.60
- 0.75
-
Which level of protein structure remains intact when a protein is denatured by heat?
- Secondary structure
- Quaternary structure
- Tertiary structure
- Primary structure
-
What shape does an alpha-helix secondary structure form in a polypeptide chain?
- Flat sheet
- Coiled spiral
- Spherical ball
- Triple helix
-
What level of protein structure describes the arrangement of multiple polypeptide chains together?
- Secondary structure
- Quaternary structure
- Primary structure
- Tertiary structure
-
Which name describes an S-S link between two cysteine residues in a protein?
- Peptide link
- Disulfide bond
- Ester link
- Glycosidic link
Related quizzes
- Nomenclature Quiz · 3.3.1.1 · 20 questions
- Reaction mechanisms Quiz · 3.3.1.2 · 20 questions
- Isomerism Quiz · 3.3.1.3 · 20 questions
- Fractional distillation of crude oil Quiz · 3.3.2.1 · 20 questions
- Modification of alkanes by cracking Quiz · 3.3.2.2 · 20 questions
- Combustion of alkanes Quiz · 3.3.2.3 · 20 questions
- Chlorination of alkanes Quiz · 3.3.2.4 · 20 questions
- Nucleophilic substitution Quiz · 3.3.3.1 · 20 questions
- Halogenoalkanes: Elimination Quiz · 3.3.3.2 · 20 questions
- Bonding Quiz · 3.3.10.1 · 20 questions