Question

1. which structure allows the passage of this substance into the cell? a) a b) b c) c d) d 6. what is common to all cells? a) all cells have a cell wall b) all cells are photosynthetic c) all cells divide to form new cells d) all cells have a nucleus 7. after a cell was treated with a certain chemical, ribosomes stopped functioning. which cell activity was immediately affected by this change in ribosome function? a) intracellular transport b) protein synthesis c) aerobic respiration d) excretion of metabolic wastes

Explanation:

• For the question about what is common to all cells: Not all cells have a cell - wall (animal cells don't), not all cells are photosynthetic (only plant and some bacteria cells are), and not all cells have a nucleus (prokaryotic cells don't). But all cells divide to form new cells as part of their life - cycle.
• For the question about the effect of ribosome malfunction: Ribosomes are the sites of protein synthesis in the cell. When they stop functioning, protein synthesis is immediately affected.

Answer:

1. C. All cells divide to form new cells
2. B. protein synthesis