A scientist examines a cell. The cell has ribosomes, a cell membrane, a cell wall and a single loop of DNA free in the cytoplasm. It has no chloroplasts.
Which conclusion is best supported by this evidence?
It is prokaryotic, because it does not contain any chloroplasts.
It is prokaryotic, because its DNA is not enclosed in a nucleus.
It is a plant cell, because it has both a cell wall and ribosomes.
It is an animal cell, because it does not contain any chloroplasts.
130 exam-style questions on OCR GCSE Biology 1.1 Cell structures, covering 1.1.1 Viewing cells with light microscopes, 1.1.2 Sub-cellular structures and functions, and 1.1.3 Electron microscopy and resolution. Each one has a worked solution and a mark scheme showing where the marks go.