Question

5 name the organelles that play a role in biosynthesis.
6 what helps the cell hold its shape if it does not have a cell wall?
7 how does a plant cell fight osmosis in a hypotonic solution?

Explanation:

Question 5

Biosynthesis - related organelles: Ribosomes (protein synthesis), Endoplasmic Reticulum (lipid/protein synthesis), Golgi Apparatus (modifies/sorts), Chloroplasts (photosynthesis - organic molecules), Mitochondria (ATP synthesis, part of metabolic biosynthesis). These organelles are involved in creating complex molecules in the cell.

Cells without a cell wall (like animal cells) rely on the cytoskeleton. The cytoskeleton has components like microtubules, microfilaments, and intermediate filaments. These structures provide structural support, help in maintaining cell shape, and also assist in cell movement and intracellular transport.

In a hypotonic solution, water enters the plant cell. The plant cell has a cell wall which is rigid. The cell wall exerts turgor pressure (wall pressure) against the expanding protoplast (cell membrane and its contents). This turgor pressure counteracts the osmotic influx of water, preventing the cell from bursting and helping it maintain its shape. Also, the large central vacuole can store water and help in regulating the cell's internal pressure.

Answer:

Ribosomes, Endoplasmic Reticulum, Golgi Apparatus, Chloroplasts, Mitochondria (any of these or a combination as per standard biology knowledge about biosynthesis - related organelles)

Question 6