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