2675415
Beschreibung
Quiz von Katie Bryden, aktualisiert more than 1 year ago
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Erstellt von Katie Bryden
vor mehr als 9 Jahre
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Frage 1
Frage
Which is the only amino acid class that is hydrophobic
Antworten
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acidic
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non-polar
-
polar
-
basic
Frage 2
Frage
The reaction that forms when two amino acid monomers are liked together is a hydration reaction
Antworten
- True
- False
Frage 3
Frage
In which stage of the protein structure does interactions between R-groups of amino acids occur ?
Antworten
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primary
-
secondary
-
tertiary
-
quaternary
Frage 4
Frage
Which one is the description for hydrophobic interactions in the protein structure ?
Antworten
-
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
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Covalent bonds form due to reactions between the Sulphur-containing R groups of cysteines
Frage 5
Frage
Choose two purines
Antworten
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Adenine
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cytosine
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uracil
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guanine
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thymine
Frage 6
Frage
The phosphodiester bonds link in the ......
Antworten
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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
Frage 7
Frage
which of the following describes the structure of cytosine
Antworten
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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
Frage 8
Frage
how many hydrogen bonds link together cytosine and guanine
Antworten
-
2
-
4
-
3
-
1
Frage 9
Frage
What do you call proteins that are easily removed from membranes in the laboratory using ionic washes
Antworten
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lateral
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integral
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horizontal
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peripheral
Frage 10
Frage
Attachment proteins are Proteins which provide cytoskeleton attachment points within the membrane for the structural support of the cell.
Antworten
- True
- False
Frage 11
Frage
The covalent chemical bonds between nucleotides in DNA are
Antworten
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peptide
-
phosphodiester
-
glycosidic
-
hydrogen
Frage 12
Frage
Refer to the picture - which colour shows the phosphate group
Antworten
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orange
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blue
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green
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purple
Frage 13
Frage
Why is cholesterol important in the membrane structure ? (could be more than one answer)
Antworten
-
reduced membrane fluidity
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allows diffusion across the membrane
-
used to maintain the structure of the membrane
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prevents solidification of the membrane at low temperatures
-
prevents solidification of the membrane at high temperatures
Frage 14
Frage
What converts inactive trypsinogen in to active trypsin
Antworten
-
kinase
-
phosphate
-
protease
-
glycogen
Frage 15
Frage
which one is true about a positive modulator (could be more than one answer)
Antworten
-
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
Frage 16
Frage
End product inhibition is when the end product binds to the substrate
Antworten
- True
- False
Frage 17
Frage
end product inhibition is a form of .....
Antworten
-
non- competitive inhibitor
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the induced fit hypothesis
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extracellular signalling
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negative feedback
-
positive modulator
Frage 18
Frage
The actions of protease
Antworten
-
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
Frage 19
Frage
the actions of kinases
Antworten
-
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
Frage 20
Frage
Find the incorrect answer on enzymes
Antworten
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they are biological catalysts
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lower the activation energy
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speeds up the reaction
-
regulate half of the metabolic reactions in a cell
Frage 21
Frage
competitive inhibitors are non-specific so can be used with a range of enzymes
Antworten
- True
- False
Frage 22
Frage
which of the following are correct about inhibitors reducing reaction rates
Antworten
-
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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