Question

Which molecules cannot be found inside cells?

a. water
b. DNA
c. lipids
d. all above can be found inside cells.

Answer 1

In cells, water serves as a solvent, DNA contains genetic information, and lipids form the plasma membrane; hence, all the given options can be found inside cells.The correct option is D.

Step-by-step explanation:

The molecules that can be found inside cells include water, DNA, and lipids. All of these molecules play essential roles in cellular functions:

• Water is a major component of cells, found in the cytosol and other intracellular fluids, facilitating chemical reactions and providing a medium for the transportation of substances.
• DNA, or deoxyribonucleic acid, contains the genetic instructions vital for the functioning and reproduction of the cell. In animal cells, DNA is located within the nucleus, surrounded by the nuclear envelope.
• Lipids make up the plasma membrane of the cell, providing a barrier that encloses the cytoplasm and separates the cell from its environment.

Therefore, the correct answer is d. all above can be found inside cells.