20 Questions
What are enzymes?
Enzymes are proteins that act as biological catalysts by accelerating chemical reactions.
What are the molecules upon which enzymes may act called?
Substrates
What do enzymes convert substrates into?
Different molecules known as products
What is the study of enzymes called?
Enzymology
What is the unique feature of an enzyme's specificity?
It comes from its unique three-dimensional structure.
How do enzymes increase the reaction rate?
By lowering the activation energy.
What are inhibitors in relation to enzyme activity?
Inhibitors are molecules that decrease enzyme activity.
How do enzymes differ from most other catalysts?
Enzymes are much more specific.
What happens to enzyme activity outside of its optimal temperature and pH?
Enzyme activity decreases markedly.
What is the effect of exposure to excessive heat on enzymes?
Many enzymes are permanently denatured, losing their structure and catalytic properties.
What did Anselme Payen discover in 1833?
An enzyme called diastase.
What did Louis Pasteur conclude about the fermentation of sugar to alcohol by yeast?
He concluded that this fermentation was caused by a vital force contained within the yeast cells called 'ferments'.
What term did Wilhelm Kühne first use to describe the process of fermentation?
Enzyme.
What did Eduard Buchner discover in 1897?
He found that sugar was fermented by yeast extracts even when there were no living yeast cells in the mixture.
What enzyme did Eduard Buchner name that brought about the fermentation of sucrose?
Zymase.
How are enzymes usually named?
According to the reaction they carry out, using the suffix -ase combined with the name of the substrate.
What are the molecules upon which enzymes may act called?
Substrates
How do enzymes increase the reaction rate?
By lowering the activation energy
What term did Wilhelm Kühne first use to describe the process of fermentation?
Enzyme
What did Anselme Payen discover in 1833?
Discovered the enzyme diastase
Test your knowledge about enzymes, the proteins that act as biological catalysts by accelerating chemical reactions in metabolic processes. Learn about the substrates, products, and the study of enzymes known as enzymology.
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