Select statements that accurately describe receptor tyrosine kinases (rtks).

(a) ligand binding is required for autophosphorylation (cross‑phosphorylation).

(b) the intracellular domain has phosphatase domains.

(c) a ligand binds to the extracellular domain.

(d) the α subunit contains seven α helices that span the membrane.

(e) the structure includes a transmembrane helix.

(f) rtks are usually monomeric in the absence of a ligand.

The correct statement that accurately describes receptor tyrosine kinases(RTKs) are A,C,E,F

Explanation:

Receptor protein tyrosine kinase are one of the most important cell surface receptor that have intrinsic enzymatic activity that helps in the phosphorylation and activation of the target proteins.

  The statements that accurately describe receptor tyrosine kinases are given below

A ligand binding is required for autophosphorylation(crossphosphorylation)

C  A ligand binds to the extracellular receptor.

E The structure induces a trans membrane helix

F  RTKs are usually monomeric in the absence of ligand.

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

bcde is the incorrect answer it is a