Proteins

Descripción

(Biological Molecules) Biology Test sobre Proteins, creado por Daniel Brand el 14/02/2017.
Daniel Brand
Test por Daniel Brand, actualizado hace más de 1 año
Daniel Brand
Creado por Daniel Brand hace más de 7 años
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Resumen del Recurso

Pregunta 1

Pregunta
This molecule is...
Respuesta
  • A triglyceride
  • An alcohol
  • An amino acid
  • Starch

Pregunta 2

Pregunta
Which of the following statements are true about proteins? Check all that apply.
Respuesta
  • They are amino acid polymers.
  • They consist of polypeptides.
  • Peptide bonds are formed in hydrolysis reactions.
  • Primary structure is the sequence of amino acids.

Pregunta 3

Pregunta
[blank_start]Amino acid[blank_end] sequence determines the [blank_start]primary[blank_end] structure of a protein. This is determined by the codons in DNA and m[blank_start]RNA[blank_end]. [blank_start]Secondary[blank_end] structure refers to one of two shapes that a polypeptide may take: beta-[blank_start]pleated sheet[blank_end] or alpha [blank_start]helix[blank_end]. This is determined by [blank_start]hydrogen[blank_end] bonding. [blank_start]Tertiary[blank_end] structure is the further folding of the polypeptide on itself. The polypeptide begins to form a more complex, unique, three-dimensional shape. Finally, [blank_start]quaternary[blank_end] structure - which does not apply to all proteins - is the interaction between several polypeptides to form a globular protein, one common example being [blank_start]haemoglobin[blank_end], responsible for carrying oxygen.
Respuesta
  • Amino acid
  • primary
  • RNA
  • Secondary
  • pleated sheet
  • helix
  • hydrogen
  • Tertiary
  • quaternary
  • haemoglobin

Pregunta 4

Pregunta
Label the types of bonds found in the tertiary structure of proteins.
Respuesta
  • Disulphide bridge
  • Hydrogen bond
  • Ionic bond
  • Hydrophobic attraction
  • Hydrophilic attraction
  • Hydrophobic attraction
  • Hydrophilic attraction
  • Ionic bond
  • Hydrogen bond
  • Disulphide bridge
  • Hydrophobic attraction
  • Hydrophilic attraction
  • Hydrogen bond
  • Ionic bond
  • Disulphide bridge
  • Hydrophilic attraction
  • Hydrophobic attraction
  • Ionic bond
  • Hydrogen bond
  • Disulphide bridge
  • Hydrophilic attraction
  • Hydrophobic attraction
  • Ionic bond
  • Hydrogen bond
  • Disulphide bridge
  • Hydrophilic attraction
  • Hydrophobic attraction
  • Disulphide bridge
  • Ionic bond
  • Hydrogen bond

Pregunta 5

Pregunta
[blank_start]Fibrous[blank_end] proteins tend to have structural roles, while [blank_start]globular[blank_end] proteins usually have [blank_start]functional[blank_end] roles.
Respuesta
  • Fibrous
  • globular
  • functional

Pregunta 6

Pregunta
Functional proteins are more soluble than structural proteins.
Respuesta
  • True
  • False

Pregunta 7

Pregunta
Fibrous proteins are more resistant to changes in pH and temperature than globular proteins.
Respuesta
  • True
  • False

Pregunta 8

Pregunta
Which of the following are structural proteins? Check all that apply.
Respuesta
  • Elastin
  • Keratin
  • Collagen
  • Haemoglobin
  • Insulin
  • Pepsin

Pregunta 9

Pregunta
[blank_start]Haemoglobin[blank_end] is a [blank_start]functional[blank_end], [blank_start]globular[blank_end] protein with a [blank_start]quaternary[blank_end] structure consisting of [blank_start]four[blank_end] polypeptide sub-units. It also has a [blank_start]prosthetic group[blank_end], which is essential to its purpose of carrying [blank_start]oxygen[blank_end] around the body.
Respuesta
  • Haemoglobin
  • Elastin
  • Keratin
  • Collagen
  • functional
  • structural
  • globular
  • fibrous
  • quaternary
  • primary
  • secondary
  • tertiary
  • four
  • three
  • two
  • five
  • prosthetic group
  • carboxyl group
  • active site
  • oxygen
  • cells
  • glucose
  • insulin

Pregunta 10

Pregunta
Insulin contains only alpha helices.
Respuesta
  • True
  • False

Pregunta 11

Pregunta
The role of insulin is to regulate [blank_start]glucose[blank_end] concentration in the blood. It does this by binding to a [blank_start]specific[blank_end] target receptor, which triggers the [blank_start]uptake[blank_end] of [blank_start]glucose[blank_end] into cells and the metabolism of [blank_start]glucose[blank_end] in [blank_start]respiration[blank_end]. The overall effect is a [blank_start]decrease[blank_end] in blood [blank_start]glucose[blank_end] concentration.
Respuesta
  • glucose
  • cholesterol
  • water
  • hydrogen ion
  • specific
  • nonspecific
  • uptake
  • release
  • synthesis
  • glucose
  • cholesterol
  • water
  • ATP
  • glucose
  • cholesterol
  • glycogen
  • triglycerides
  • respiration
  • photosynthesis
  • glycogenesis
  • glucogenesis
  • decrease
  • increase
  • glucose
  • cholesterol
  • water
  • hydrogen ions
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