Questions: Fish sperm is composed mostly of DNA. If we tested a sample chemically, we should find relatively high amounts of Multiple Choice phospholipids and steroids. amino acids and unsaturated fats. nitrogenous bases, sugar, and phosphate groups. triglycerides and ATP. globular proteins and stored fats.

The answer is the third one: nitrogenous bases, sugar, and phosphate groups.

Explanation for each option:

1. Phospholipids and steroids: These are components of cell membranes and hormones, not DNA. DNA is not composed of phospholipids or steroids.

2. Amino acids and unsaturated fats: Amino acids are the building blocks of proteins, and unsaturated fats are a type of lipid. Neither is a component of DNA.

3. Nitrogenous bases, sugar, and phosphate groups: These are the components of DNA. DNA is made up of nucleotides, each consisting of a nitrogenous base (adenine, thymine, cytosine, or guanine), a sugar (deoxyribose), and a phosphate group. Therefore, a chemical test of fish sperm, which is mostly DNA, would show high amounts of these components.

4. Triglycerides and ATP: Triglycerides are fats, and ATP is an energy-carrying molecule. Neither is a component of DNA.

5. Globular proteins and stored fats: Globular proteins are a type of protein, and stored fats are lipids. Neither is a component of DNA.

In summary, since fish sperm is composed mostly of DNA, a chemical test would reveal high amounts of nitrogenous bases, sugar, and phosphate groups.