Biology Advanced higher - part of cell and molec

Beschreibung

part of cell and molecular course
Katie Bryden
Quiz von Katie Bryden, aktualisiert more than 1 year ago
Katie Bryden
Erstellt von Katie Bryden vor mehr als 9 Jahre
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Zusammenfassung der Ressource

Frage 1

Frage
Which is the only amino acid class that is hydrophobic
Antworten
  • acidic
  • 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
  • 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
  • Covalent bonds form due to reactions between the Sulphur-containing R groups of cysteines

Frage 5

Frage
Choose two purines
Antworten
  • Adenine
  • cytosine
  • uracil
  • guanine
  • thymine

Frage 6

Frage
The phosphodiester bonds link in the ......
Antworten
  • 3' to 5' direction
  • 5' to 3' direction
  • 2' to 6' direction
  • 6' to 2' direction

Frage 7

Frage
which of the following describes the structure of cytosine
Antworten
  • A purine base with a single-ring structure
  • A purine base with a double bond structure
  • A pyrimidine base with a single-ring structure
  • 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
  • lateral
  • integral
  • horizontal
  • 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
  • peptide
  • phosphodiester
  • glycosidic
  • hydrogen

Frage 12

Frage
Refer to the picture - which colour shows the phosphate group
Antworten
  • orange
  • blue
  • green
  • purple

Frage 13

Frage
Why is cholesterol important in the membrane structure ? (could be more than one answer)
Antworten
  • 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

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
  • the induced fit hypothesis
  • extracellular signalling
  • 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
  • they are biological catalysts
  • lower the activation energy
  • 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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