Which components in animal blood are used to produce eggs?

Which components in animal blood are used to produce eggs?

• A. Enzymes and proteins
• B. Lipids and carbohydrates
• C. Nucleic acids
• D. Water only

Answer: (A)

Egg formation relies on nutrients and protein-rich precursors carried in the bloodstream. The liver makes yolk precursors (like vitellogenin) that travel in the blood to the ovaries, where they are taken up by developing eggs and processed into yolk proteins. Enzymes—being proteins themselves—also participate in the metabolic steps that assemble and modify these yolk components. So, blood delivers the protein-based materials that build the egg, with enzymes helping drive the conversion processes. While lipids are part of yolk, the direct blood-borne components used to construct eggs are primarily proteins (including the enzyme proteins), making this choice the best fit.

Egg formation relies on nutrients and protein-rich precursors carried in the bloodstream. The liver makes yolk precursors (like vitellogenin) that travel in the blood to the ovaries, where they are taken up by developing eggs and processed into yolk proteins. Enzymes—being proteins themselves—also participate in the metabolic steps that assemble and modify these yolk components. So, blood delivers the protein-based materials that build the egg, with enzymes helping drive the conversion processes. While lipids are part of yolk, the direct blood-borne components used to construct eggs are primarily proteins (including the enzyme proteins), making this choice the best fit.