Question 1 of 8enzyme inhibition
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Fig. 2.1 shows two types of enzyme inhibition. In one type, both the substrate and an inhibitor are able to bind directly to the enzyme's…
Fig 1.1 shows a diagrammatic model of a cell surface membrane. Name the structure labelled P.
In terms of protein structure, what term describes the specific sequence in which amino acids are joined by peptide bonds along a…
In Meselson and Stahl's experiment, bacterial cells were first grown in medium containing the heavy nitrogen isotope ¹⁵N, then transferred…
Fig. 2.1 shows two types of enzyme inhibition. In the second type, the substrate still binds normally to the active site, but an inhibitor…
In genetic engineering, a plasmid and a human gene are cut with the same restriction enzyme so that their cut ends are complementary. Which…
Fig 1.1 is a diagram of protein tertiary structure. The bond labelled A forms by electrostatic attraction between two oppositely charged…
During the formation of recombinant DNA, an mRNA molecule for the required gene is isolated and an enzyme is used to synthesise a…
In a cell surface membrane, water-soluble (polar) substances cannot diffuse freely across the lipid bilayer. Which part of the membrane…
In an enzyme-catalysed reaction, the potential energy of the substrates at the start of the reaction is 50 kJ, and the maximum potential…
Red-green colour blindness is inherited as an X-linked recessive trait, with X^B representing the normal (dominant) allele and X^b…
Fig 1.1 shows the structure of the cell membrane, with structures labelled A, B and C. What is the name of the molecule labelled A, which…
A haemoglobin molecule is made up of four polypeptide subunits, two alpha chains and two beta chains, held together as a single functional…
In Meselson and Stahl's experiment, cells were grown in medium containing the heavy isotope ¹⁵N, then transferred to medium containing the…
In competitive inhibition, the inhibitor competes with the substrate for the enzyme's active site. At a sufficiently high substrate…
A recombinant plasmid carrying an antibiotic resistance gene is used to transform bacterial cells. Which of the following is a standard…
Fig 1.1 is a diagram of protein tertiary structure. The bond labelled B forms by weak electrostatic attraction between a hydrogen atom…
In recombinant DNA technology, both the DNA containing the required gene and the vector (e.g. plasmid) DNA must be cut at specific…