Question

Select the true statement.
Hormones speed up chemical reactions.
Insulin's shape allows it to bind to specific parts of a cell.
Insulin transports glucose into a cell.

Answer 1

The true statement is: "Insulin's shape allows it to bind to specific parts of a cell."

Brief clarifications:
- Hormones speed up chemical reactions — false; enzymes (not hormones) are biological catalysts that speed reactions.
- Insulin transports glucose into a cell — false; insulin doesn’t carry glucose itself. It binds to insulin receptors and signals cells (e.g., by causing GLUT4 transporters to move to the membrane) so glucose can be taken up.