GCSE Biology – Key concepts – 1 – Exam Style Questions with Answers

Which of the following describes osmosis?

Figure 3 shows some onion cells that have been soaked in a concentrated salt solution.
The cells in Figure 3 have been stained.
Give one reason why the cells have been stained.

Alcohol is broken down by liver cells.
Which process moves alcohol from the blood into the liver cells?

Osmosis is one method that single-celled organisms, such as bacteria, use to obtain
molecules from their environment.
Which of the following is a correct description of a process involving the transport of
molecules?

Figure7 shows mitosis occur ring in some plant cells.
The cells in Figure7 were taken from a rapidly growing part of a plant.
Which part of a plant has rapidly dividing cells?

Substances move into and out of cells.
How does oxygen move into and out of cells?

Some substances move into and out of cells by active transport.
Which is the correct description of the movement of a substance by active transport?

Figure 3 shows some onion cells that have been soaked in a concentrated salt solution.
Which is the name of the structure labelled V?