Student situation

I memorise Biology terms but cannot explain a process

You can define every word on the flashcard, but a why question leaves you blank.

“I can tell you what an active site is. Ask me why amylase stops working in hot water, and I freeze.” You remember the terms, but not how they connect.

This page belongs to the SPM Biology help pages. For the topic, see metabolism and enzymes, and for the words, see the Biology glossary.

Why do the terms not turn into an explanation?

A definition is one fixed sentence. An explanation is a chain, and each link needs a reason. If you study only definitions, you never practise the chain.

Questions that start with “explain why” ask for the chain. Flashcards test single terms, so they leave a gap.

One example: turning four terms into a chain

An original question: explain why amylase stops working at a very high temperature. The four flashcard terms are heat, bonds, active site and substrate.

Now join them with “because” and “so”.

The high temperature gives the enzyme extra energy, so the bonds holding its shape break.
The shape of the active site changes, because the enzyme is no longer folded the same way.
The substrate no longer fits the active site, so no product is formed.

The same four terms are now an explanation. Each “so” and “because” shows why one term leads to the next.

What can I do on my own?

Try this routine on any topic:

Write the four to six key terms on a sheet.
Put them in the order things happen.
Join each pair with “because” or “so”, aloud or in writing.
Hide the sheet and say the chain from memory.

If you stall between two terms, revise that pair and add a why card for it.

When might one-to-one tuition help?

If you keep stalling at the same link even after revising, it helps to have someone ask the next why. A one-to-one teacher can listen, find the exact step where the chain breaks, and teach that link. That is hard to spot alone.

This site covers the routine for free, and a teacher adds live questions on your own explanations. See online one-to-one Biology tuition if that would be useful.

What to read next

If your answers are long but miss the point, read long Biology answers that still miss the mechanism. To check a tricky word, see the glossary.

Tools for this page

Common questions

Why can I define terms but not explain processes?

Definitions and explanations use different skills. A definition recalls a fixed sentence. An explanation links terms with cause and effect, which needs practice in connecting ideas, not just storing them.

How do I turn terms into an explanation?

Put the terms in order, then join each pair with a because or so. The result is a chain in which every term has a reason for following the one before.

Are flashcards useless then?

No. Flashcards are good for terms. Add a second kind of card with a why question on the front and a short chain on the back, so you practise explanations as well.

Keep going

If the because-chain still breaks at the same place, a one-to-one Biology teacher can ask the next why after each of your sentences and help you fill the gap.

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