Ninth graders learn how enzymes — special proteins — speed up the chemical reactions that keep cells alive, binding their specific substrate at the active site like a lock and key, and how heat or pH can denature them.
Students will be able to…
Reactions in your body that would take years happen in seconds — thanks to enzymes. How do these protein machines speed up chemistry, and why does a fever or the wrong pH break them?
Project this and match each enzyme term to its definition — tap the term, then tap what it means.
Tap any phase to open the teacher moves and student actions.
Reactions that should take years happen in seconds in your cells — how?
Students investigate.
Students explain.
Students elaborate.
Students conclude.
Aligned to the Next Generation Science Standards (High School Life Science).
Construct an explanation about the role of large carbon-based molecules (proteins).
Explain how energy drives the reactions of life.
Explain the roles of cellular molecules.
Constructing explanations.
Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.
Have students graph how enzyme activity rises with temperature, peaks, then crashes when the enzyme denatures. A printable enzymes sheet is in the Science library.
Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.
A quick self-check with instant feedback, drawn from this lesson’s key terms.
A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.