Where does blood cell formation primarily occur in adults?

A. 50% water and 50% proteins: Urine normally contains very little protein; a high protein content can indicate kidney damage. Water makes up the majority of urine volume.

B. 80% glucose and 20% water: Glucose is typically absent or present in trace amounts in healthy urine. High glucose levels indicate conditions like diabetes mellitus.

C. 90% bile and 10% water: Bile components are not a primary constituent of urine. Bilirubin may appear in urine in certain liver disorders, but urine is not composed mainly of bile.

D. 95% water and 5% solutes: Healthy urine is mostly water, with about 5% dissolved solutes including urea, salts, creatinine, and other metabolic waste products. This composition helps maintain fluid and electrolyte balance.

A. Ribosome: Ribosomes are responsible for protein synthesis by translating mRNA into amino acid sequences. They do not produce energy for the cell.

B. Nucleus: The nucleus stores genetic material and regulates cellular activities by controlling gene expression. It does not generate cellular energy directly.

C. Golgi apparatus: The Golgi apparatus modifies, sorts, and packages proteins and lipids for transport within or outside the cell. It is not involved in energy production.

D. Mitochondria: Mitochondria are the “powerhouses” of the cell, generating ATP through cellular respiration. They convert nutrients like glucose and fatty acids into usable energy to fuel cellular functions.