Sec 1 Science Model of Cells topical questions

State the function of each part.

1. (a)Nucleus[1]
2. (b)Cell membrane[1]
3. (c)Chloroplast[1]

Name two structures found in a typical plant cell that are absent from a typical animal cell.

Arrange these in order from smallest level to largest: organ, cell, system, tissue.

State what DNA is.

Give one safety rule for using a microscope.

A slide shows two cells. Cell P has a cell wall, chloroplasts and a large vacuole. Cell Q has a nucleus and cell membrane but no cell wall.

1. (a)Which cell is from a plant? Give two reasons.[3]
2. (b)Name one part that both cells have, and state its function.[1]

Explain the difference between a cell wall and a cell membrane.

A leaf is an organ. Explain what that means, starting from cells.

A root cell has a cell wall and a large vacuole but no chloroplasts. Explain why it is still a plant cell, and why the missing chloroplasts make sense.

Explain what division of labour means at the cellular level, using one plant example.

A student labels the cell wall as “controls what enters the cell” and the cell membrane as “makes food”. Rewrite both labels correctly and explain each correction.

Explain why scientists call the typical animal cell a model, and give one prediction the model lets you make.

Before microscopes, people could not see cells. Explain how the invention changed knowledge, in two or three sentences.

Two students argue. One says “every plant cell has chloroplasts”. The other says “a cell with a cell wall and no chloroplasts cannot be a plant cell”. Evaluate both claims.

The heart is an organ in a system. Describe the levels of organisation inside that sentence, and state what would happen to the idea of division of labour if every cell in the body were identical.