A-Level Biology: Cell Biology Practice

Which of the following structures is present in a prokaryotic cell but absent from an eukaryotic animal cell?

The rough endoplasmic reticulum is described as 'rough' because it has which of the following attached to its surface?

Compare the ultrastructure of a plant cell and an animal cell. Which structure is found in plant cells but NOT in animal cells?

The fluid mosaic model of cell membranes describes the membrane as having phospholipid molecules that can:

Facilitated diffusion differs from simple diffusion because facilitated diffusion:

Endocytosis is the process by which cells:

During which phase of mitosis do sister chromatids separate and move to opposite poles?

Cyclin-dependent kinases (Cdks) regulate the cell cycle. Analyse the role of cyclins in controlling progression through cell cycle checkpoints.

Evaluate which of the following is most likely to result in a cell becoming cancerous.

Which monosaccharide is the primary product of photosynthesis and the main respiratory substrate in cells?

Describe the structure and function of a triglyceride molecule.

A DNA molecule has 120 adenine bases. Using Chargaff’s rules and base pairing rules, calculate the number of cytosine bases if the total number of bases is 600.

Osmosis can be defined as:

Analyse why the xylem vessels in plant roots are adapted for mass flow of water.

Evaluate the Fick’s law relationship: Rate of Diffusion is proportional to (Surface Area x Concentration Difference) / Thickness. A cell doubles in radius. By what factor does the surface area to volume ratio change?

At a resting neurone, the inside of the axon membrane is approximately -70mV relative to the outside. This resting potential is maintained primarily by:

Describe the events that occur at a cholinergic synapse when an action potential arrives.

Evaluate why a reflex arc is advantageous for an organism’s survival compared to a non-reflex neural pathway.