Lipid-Soluble Signalling Molecules, Such as Aldosterone, Cross the Membranes of All

question 37

Multiple Choice

Lipid-soluble signalling molecules, such as aldosterone, cross the membranes of all cells but affect only target cells because

• A) only target cells retain the appropriate DNA segments.
• B) intracellular receptors are present only in target cells.
• C) only target cells have enzymes that break down aldosterone.
• D) only in target cells is aldosterone able to initiate the phosphorylation cascade that turns genes on.

---

Definitions:

Pure Resins

Highly purified substances produced by plants that are valued for their chemical properties and used in a variety of applications, including as adhesives, varnishes, and incense.

Recycled

The process of converting waste materials into new materials and objects, aiming to reduce use of raw materials, energy consumption, and environmental impact.

Plastic Products

Items manufactured from plastic, a synthetic material made from a wide range of organic polymers, that can be molded into shape while soft and then set into a rigid or slightly elastic form.