How do prokaryotic and eukaryotic cells compare in size?
Prokaryotic cells are much smaller than eukaryotic cells.
AQA A-Level Biology - (7402) · 3.2.1.2
Revise AQA A-Level Biology - (7402) specification point 3.2.1.2, Structure of prokaryotic cells and of viruses, with free active-recall flashcards. Flip through the set or review every question and answer below.
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How do prokaryotic and eukaryotic cells compare in size?
Prokaryotic cells are much smaller than eukaryotic cells.
What type of organelle is absent from prokaryotic cytoplasm?
Membrane-bound organelles.
How do prokaryotic ribosomes compare in size with eukaryotic ribosomes?
Prokaryotic ribosomes are smaller.
How is the main DNA of a prokaryotic cell organised?
A single circular DNA molecule lies free in the cytoplasm, without a nucleus or associated proteins.
What substance is found in prokaryotic cell walls?
Murein, also called peptidoglycan.
What is murein made of?
It is a polymer of sugars and short peptide chains.
What are prokaryotic plasmids?
Small circular DNA molecules separate from the main DNA molecule.
What two structures may be present on the outside of a prokaryotic cell?
A capsule surrounding the cell and one or more flagella; either or both may be present.
What is the cellular organisation of viruses?
Viruses are acellular.
Are viruses classified as living or non-living?
Non-living.
What types of genetic material can a virus particle contain?
DNA or RNA.
What is a viral capsid?
A protein coat that encloses the virus’s genetic material.
What is the function of viral attachment proteins?
They enable the virus to bind to a host cell.