Why does the surface area to volume ratio matter for a single-celled organism?
Answer and explanation
Correct answer: D. A large ratio lets exchange of gases and nutrients across the surface supply the whole cell quickly
- Step 1: Exchange happens across the surface. Step 2. A large ratio supplies each unit of volume quickly. Answer: a large ratio speeds exchange. Why not the others: these reverse the relationship.
Practise more Cells, Biological Molecules and Genes.
Free questions with an explanation for every one, and full timed Cambridge A-Level mock tests.
More Cells, Biological Molecules and Genes questions
- Which organelle is the main site of aerobic respiration in a eukaryotic cell?
- What type of bond joins amino acids together in a polypeptide?
- A competitive inhibitor reduces the rate of an enzyme-controlled reaction. Which statement explains this?
- In the fluid mosaic model of the cell surface membrane, what is the function of cholesterol?
- A cell placed in a solution has a water potential lower than the cell contents. What happens?
- Which statement about DNA replication is correct?