1. What are steroids? Delete the incorrect answers.

A. a type of synthetic hormone
B. a broad category of molecules
C. a source of protein
D. a type of medicine

A. a type of synthetic hormone

B. a broad category of molecules
D. a type of medicine

1. What are steroids? Delete the incorrect answers.

A. a type of synthetic hormone
D. a type of medicine

To determine the correct answer, we need to understand what steroids are. Steroids are a broad category of molecules characterized by a specific structure, consisting of four interconnected rings of carbon atoms. They can be classified into two main types: corticosteroids and anabolic steroids.

Corticosteroids are synthetic hormones that closely resemble cortisol, a hormone naturally produced by the adrenal glands. They have anti-inflammatory properties and are commonly used in medicine to treat various conditions like allergies, asthma, arthritis, and certain skin conditions.

Anabolic steroids, on the other hand, are synthetic variations of the male sex hormone testosterone. They are used to promote muscle growth, enhance athletic performance, and increase strength. However, the use of anabolic steroids for non-medical purposes is illegal and can lead to serious health consequences.

Therefore, based on the given options, the correct answer is:

D. a type of medicine

We can delete the incorrect answers:

A. a type of synthetic hormone (not all steroids are synthetic hormones; some are naturally produced)
B. a broad category of molecules (this is true, but it doesn't distinguish steroids from other types of molecules)
C. a source of protein (steroids are not a source of protein; they are a distinct class of molecules)