2675415
Descripción
Test por Katie Bryden, actualizado hace más de 1 año
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Creado por Katie Bryden
hace más de 9 años
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Pregunta 1
Pregunta
Which is the only amino acid class that is hydrophobic
Respuesta
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acidic
-
non-polar
-
polar
-
basic
Pregunta 2
Pregunta
The reaction that forms when two amino acid monomers are liked together is a hydration reaction
Respuesta
- True
- False
Pregunta 3
Pregunta
In which stage of the protein structure does interactions between R-groups of amino acids occur ?
Respuesta
-
primary
-
secondary
-
tertiary
-
quaternary
Pregunta 4
Pregunta
Which one is the description for hydrophobic interactions in the protein structure ?
Respuesta
-
Non-polar R groups are mostly arranged to the inside of the protein. The Polar, acidic and basic R groups are mostly arranged on the outside
-
Very weak attractions between the electron clouds of atoms
-
The weak negative charge of the oxygen of the C=o is attracted to the weak positive charge on a hydrogen of an OH or NH2 group
-
The COOH and NH2 groups ionise to become COO- and NH3+. These groups are strongly charged and can attract each other
-
Covalent bonds form due to reactions between the Sulphur-containing R groups of cysteines
Pregunta 5
Pregunta
Choose two purines
Respuesta
-
Adenine
-
cytosine
-
uracil
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guanine
-
thymine
Pregunta 6
Pregunta
The phosphodiester bonds link in the ......
Respuesta
-
3' to 5' direction
-
5' to 3' direction
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2' to 6' direction
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6' to 2' direction
Pregunta 7
Pregunta
which of the following describes the structure of cytosine
Respuesta
-
A purine base with a single-ring structure
-
A purine base with a double bond structure
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A pyrimidine base with a single-ring structure
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A pyrimidine base with a double ring structure
Pregunta 8
Pregunta
how many hydrogen bonds link together cytosine and guanine
Respuesta
-
2
-
4
-
3
-
1
Pregunta 9
Pregunta
What do you call proteins that are easily removed from membranes in the laboratory using ionic washes
Respuesta
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lateral
-
integral
-
horizontal
-
peripheral
Pregunta 10
Pregunta
Attachment proteins are Proteins which provide cytoskeleton attachment points within the membrane for the structural support of the cell.
Respuesta
- True
- False
Pregunta 11
Pregunta
The covalent chemical bonds between nucleotides in DNA are
Respuesta
-
peptide
-
phosphodiester
-
glycosidic
-
hydrogen
Pregunta 12
Pregunta
Refer to the picture - which colour shows the phosphate group
Respuesta
-
orange
-
blue
-
green
-
purple
Pregunta 13
Pregunta
Why is cholesterol important in the membrane structure ? (could be more than one answer)
Respuesta
-
reduced membrane fluidity
-
allows diffusion across the membrane
-
used to maintain the structure of the membrane
-
prevents solidification of the membrane at low temperatures
-
prevents solidification of the membrane at high temperatures
Pregunta 14
Pregunta
What converts inactive trypsinogen in to active trypsin
Respuesta
-
kinase
-
phosphate
-
protease
-
glycogen
Pregunta 15
Pregunta
which one is true about a positive modulator (could be more than one answer)
Respuesta
-
It is also known as an activator
-
reduces the affinity of the enzyme
-
binds to a different allosteric site
-
increases the formation of all products
-
also known as an inhibitor
-
changes the shape of the enzyme
Pregunta 16
Pregunta
End product inhibition is when the end product binds to the substrate
Respuesta
- True
- False
Pregunta 17
Pregunta
end product inhibition is a form of .....
Respuesta
-
non- competitive inhibitor
-
the induced fit hypothesis
-
extracellular signalling
-
negative feedback
-
positive modulator
Pregunta 18
Pregunta
The actions of protease
Respuesta
-
Hydrolysis of peptide bonds break down proteins
-
Hydrolysis of phosphodiester bonds to break down nucleic acids
-
Hydrolysis of the phosphodiester bond in ATP to form ADP and phosphate
-
Condensation reaction to add to phosphate group to another molecule
Pregunta 19
Pregunta
the actions of kinases
Respuesta
-
Hydrolysis of peptide bonds break down proteins
-
Hydrolysis of phosphodiester bonds to break down nucleic acids
-
Hydrolysis of the phosphodiester bond in ATP to form ADP and phosphate
-
Condensation reaction to add to phosphate group to another molecule
Pregunta 20
Pregunta
Find the incorrect answer on enzymes
Respuesta
-
they are biological catalysts
-
lower the activation energy
-
speeds up the reaction
-
regulate half of the metabolic reactions in a cell
Pregunta 21
Pregunta
competitive inhibitors are non-specific so can be used with a range of enzymes
Respuesta
- True
- False
Pregunta 22
Pregunta
which of the following are correct about inhibitors reducing reaction rates
Respuesta
-
they can alter enzyme's shapes so it becomes inactive
-
they can resemble the substrate
-
they bind to another part of the enzyme
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