Practise IB Biology HL 2.1.6 by applying transmembrane vs. intracellular receptors concepts to exam-style questions.
Distinguish between the mode of action of steroid hormones and peptide hormones.
steroid hormones
peptide hormones
Marking guidance:
Award [1 mark] for each complete row, up to [3 max].
Apply ECF the second time plasma is omitted and award the mark
3 max
а
enter the cell/pass through the plasma membrane
do not enter the cell/pass through the plasma membrane
b
bind to receptor in cytoplasm
bind to receptor on plasma membrane surface
c
act directly on DNA
act through second messenger/cAMP
d
directly affect gene transcription
influence enzyme activity/protein kinase