1. semipermeable; allows certain substances to pass through
Answer: plasma membrane
Substance like ion have to be regulated closely. Plasma membrane will regulate the concentration of some molecule by making them unable to pass it. Other molecule will be able to pass it freely, like water in osmosis.
2. controls activities of the cell
Answer: nucleus
Nucleus is the most vital organele of the cell that will regulate the cell activities. It contain the genetic material of the cell(DNA/RNA) that needed for protein synthesis. The protein itself will be used to create a new organelle or repair a damaged structure.
3. storage structure
Answer: Vacuole
Vacuole is a membrane bound organelle that used to contain and transport substance. Vacuole could contain a hazardous material so it wont damage the cells, then moving it to the plasma membrane for disposal. It could also store different substance for use like calcium or neurotransmitter.
4. thick fluid between plasma membrane and nucleus
Answer: cytoplasm
Cytoplasm is a gel-like substance that make most of the cell. It is made most of water, so the volume will be influenced by the water content of the cell. Cytoplasm has a role in cell signalling by allowing the movement of certain molecule.
5. functional plant or animal
Answer: organism
An organism is a living individual entity. It could be animal, plants, fungi or even bacteria(microorganism). It could be made of a single cell or multicellular. A living organism will constantly be doing metabolism and need food to sustain their life. By this definition, a virus is not a living organism because they can't do metabolize by their self.
6. fibrous material giving support to the plant
Answer: cell wall
Plant cell has a rigid and sturdy structure around it plasma membrane called cell wall. Cell wall will protect the outer side of the plant cells from attack. This structure makes the plant cell membrane stronger than the animal cells. The cell wall is made by a combination of carbohydrate and proteins.
7. produces ribosomal nucleic acid (RNA)
Answer: nucleolus
Nucleolus is an organ that located inside the nucleus. The size is about 25% of the nucleus and it shown as a darker circle inside the nucleus. Nucleolus has a role in the earlier phase of RNA synthesis cascade as it was the place of ribosome biogenesis.
