enzyme - Master This Word
Master this word with our 5-step learning method – Learn English in English
enzyme Word Meanings
- A substance that speeds up a chemical reaction in living organisms.
- A protein that acts as a catalyst in biological processes.
enzyme Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
enzyme Phonetic & Pronunciation
UK
/ˈɛnzaɪm/
US
/ˈɛnzaɪm/
enzyme Word Etymology
en- = within + zyme = leaven, ferment from Greek 'zyme', which means to leaven. Imagine the bubbling reaction in dough as it rises and transforms thanks to enzymes acting from within.
Note 1: These definitions and etymologies are not standard dictionary definitions, but extended explanations provided to help with memorization and understanding of the actual application of words. Through this background information, we strive to make words more vivid and easier to understand, and help you remember their meanings in real life.
Note 2: LexiTalk designs the learning flow around the linguistics principle of “Comprehensible Input.” When learners encounter material that is slightly above their level but still understandable from context, the brain naturally absorbs the language. That’s why we keep every word inside authentic contexts, using examples and associations to help you understand it and use it flexibly.
Read the FAQ explanation of Comprehensible InputReal Context
Enzymes are biological molecules that speed up chemical reactions inside living organisms without being consumed in the process. Most enzymes are proteins with a specific three-dimensional shape that creates an active site where a substrate fits like a key in a lock. When the substrate binds, the enzyme lowers the activation energy required for the reaction, allowing it to proceed more rapidly than it would otherwise. Enzymes are highly specific, typically catalyzing a single type of chemical reaction, and they can be regulated by temperature, pH, and cofactors. Understanding enzymes helps explain digestion, metabolism, and many biotechnological applications.
Usage Reminders
- Remember these tips:
- - Enzymes are proteins with specific shapes and active sites.
- - Many English enzyme names end in -ase, but not all chemicals that catalyze reactions are enzymes.
- - Temperature and pH affect enzyme activity, not just the presence of the substrate.
- - Distinguish substrate, product, and enzyme.
- - Practice with everyday examples like digestion and fermentation.
- - Use diagrams to visualize active sites and enzyme-substrate fit.
Common Misconceptions
- Enzymes are consumed during a reaction.
- All catalysts are enzymes.
- Enzymes work the same at any temperature or pH.
- Enzymes change into different substances.
- Only the stomach has enzymes.
Thinking Differences
English speakers often think of enzymes as precise biological catalysts with a strong emphasis on active sites and specificity; learners may overgeneralize to all catalysts or worry about protein vs non-protein catalysts.
Learning Tips
- Remember the -ase suffix as a hint for enzyme names.
- Differentiate enzyme from substrate and product.
- Always consider temperature and pH when thinking about activity.
- Use diagrams showing active site and substrate fit.
- Learn a few key examples (amylase, lactase, protease).
- Practice by parsing digestion pathways.
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the meaning of the word 'enzyme'?
A.A substance that breaks down food
B.A type of vitamin essential for cell growth
C.A type of protein that speeds up chemical reactions
D.A hormone regulating metabolism
Step 2: Usage
In which of the following sentences is 'enzyme' used correctly?
A.The enzyme in saliva helps to break down food during digestion.
B.I need to buy some enzyme to fix the car engine.
C.She added some enzyme to the recipe to make it tastier.
D.The enzyme of the story left everyone speechless.
Step 3: Similar Words
Which of the following is a synonym for 'enzyme'?
A.Inhibitor
B.Catalyst
C.Solvent
D.Substrate
Step 4: Opposite Words
What is the opposite of 'enzyme'?
A.Hinder
B.Block
C.Catalyze
D.Inhibit
Step 5: Mastery
How are enzymes important in the process of digestion?
A.Enzymes help regulate body temperature.
B.Enzymes are not involved in digestion.
C.Enzymes are only found in plant-based foods.
D.Enzymes speed up chemical reactions that break down food into nutrients.
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