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Cells 5
Bioenergetics & Enzymes
Question | Answer |
---|---|
cells create organisation from raw materials in the environment, they also contribute to disorder in the environment by releasing _____________. | Heat |
A prosthetic group is the part of an enzyme that: | A cofactor that is permanently bound to the enzyme |
Some bacteria are metabolically active in hot springs because: | their enzymes have high optimal temperatures. |
The role of an enzyme in an enzyme catalysed reaction is to: | Increase the rate at which the substrate is converted into product |
Which of the following molecules is NOT classified as a vitamin but does require the ingestion of a vitamin for its production? | retinal |
Enzyme activity can be regulated by allosteric inhibitors | True |
Biological oxidation-reduction reactions always involve | Transfer of electrons |
A molecule that gives up electrons is | Oxidized |
Which of the following mechanisms best describes the manner in which lysozyme lowers the energy required for its substrate to reach its transition state conformation? | by altering the shape of the substrate to mimic the conformation of the transition state |
The main difference between a catalysed and an un-catalysed reaction is that: | The activation energy of the catalysed reaction is lower |
Reduction is a chemical reaction where a molecule gains electrons | True |
Two enzymes with a similar structure are likely to have: | Evolved from a common ancestor |
Active site of an enzyme binds a substrate | True |
Oxidation is a chemical reaction where a molecule gains electrons | False |
The specific subset of these reactions that breakdown nutrients in food can be described as _____________. | catabolic |