Test
Biology Advanced higher - part of cell and molec
Preguntas del test (22)
1Which is the only amino acid class that is hydrophobic
- Aacidic
- Bnon-polar
- Cpolar
- Dbasic
2The reaction that forms when two amino acid monomers are liked together is a hydration reaction
- AVerdadero
- BFalso
3In which stage of the protein structure does interactions between R-groups of amino acids occur ?
- Aprimary
- Bsecondary
- Ctertiary
- Dquaternary
4Which one is the description for hydrophobic interactions in the protein structure ?
- ANon-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
- BVery weak attractions between the electron clouds of atoms
- CThe 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
- DThe COOH and NH2 groups ionise to become COO- and NH3+. These groups are strongly charged and can attract each other
- ECovalent bonds form due to reactions between the Sulphur-containing R groups of cysteines
5Choose two purines
- AAdenine
- Bcytosine
- Curacil
- Dguanine
- Ethymine
6The phosphodiester bonds link in the ......
- A3' to 5' direction
- B5' to 3' direction
- C2' to 6' direction
- D6' to 2' direction
7which of the following describes the structure of cytosine
- AA purine base with a single-ring structure
- BA purine base with a double bond structure
- CA pyrimidine base with a single-ring structure
- DA pyrimidine base with a double ring structure
8how many hydrogen bonds link together cytosine and guanine
- A2
- B4
- C3
- D1
9What do you call proteins that are easily removed from membranes in the laboratory using ionic washes
- Alateral
- Bintegral
- Chorizontal
- Dperipheral
10Attachment proteins are Proteins which provide cytoskeleton attachment points within the membrane for the structural support of the cell.
- AVerdadero
- BFalso
11The covalent chemical bonds between nucleotides in DNA are
- Apeptide
- Bphosphodiester
- Cglycosidic
- Dhydrogen
12Refer to the picture - which colour shows the phosphate group
- Aorange
- Bblue
- Cgreen
- Dpurple
13Why is cholesterol important in the membrane structure ? (could be more than one answer)
- Areduced membrane fluidity
- Ballows diffusion across the membrane
- Cused to maintain the structure of the membrane
- Dprevents solidification of the membrane at low temperatures
- Eprevents solidification of the membrane at high temperatures
14What converts inactive trypsinogen in to active trypsin
- Akinase
- Bphosphate
- Cprotease
- Dglycogen
15which one is true about a positive modulator (could be more than one answer)
- AIt is also known as an activator
- Breduces the affinity of the enzyme
- Cbinds to a different allosteric site
- Dincreases the formation of all products
- Ealso known as an inhibitor
- Fchanges the shape of the enzyme
16End product inhibition is when the end product binds to the substrate
- AVerdadero
- BFalso
17end product inhibition is a form of .....
- Anon- competitive inhibitor
- Bthe induced fit hypothesis
- Cextracellular signalling
- Dnegative feedback
- Epositive modulator
18The actions of protease
- AHydrolysis of peptide bonds break down proteins
- BHydrolysis of phosphodiester bonds to break down nucleic acids
- CHydrolysis of the phosphodiester bond in ATP to form ADP and phosphate
- DCondensation reaction to add to phosphate group to another molecule
19the actions of kinases
- AHydrolysis of peptide bonds break down proteins
- BHydrolysis of phosphodiester bonds to break down nucleic acids
- CHydrolysis of the phosphodiester bond in ATP to form ADP and phosphate
- DCondensation reaction to add to phosphate group to another molecule
20Find the incorrect answer on enzymes
- Athey are biological catalysts
- Blower the activation energy
- Cspeeds up the reaction
- Dregulate half of the metabolic reactions in a cell
21competitive inhibitors are non-specific so can be used with a range of enzymes
- AVerdadero
- BFalso
22which of the following are correct about inhibitors reducing reaction rates
- Athey can alter enzyme's shapes so it becomes inactive
- Bthey can resemble the substrate
- Cthey bind to another part of the enzyme
Información
- Descripción
- part of cell and molecular course
- Autor
- Katie Bryden
- Idioma
- English
- Visitas
- 65
- Etiquetas
- Valoración
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