Subjects
Choose questions individually, practise online, or create a worksheet with matching answers. Counts include generated variants, not only authored originals.
Cell membrane
Cell membrane: The selectively permeable boundary around a cell.
Cytoplasm
Cytoplasm: The cell contents inside the membrane, excluding the nucleus in a eukaryotic cell.
Nucleus
Nucleus: The membrane-bound structure that contains most DNA in a eukaryotic cell.
Ribosome
Ribosome: The cellular structure where proteins are assembled.
Mitochondrion
Mitochondrion: An organelle where much aerobic cellular respiration occurs in eukaryotes.
Chloroplast
Chloroplast: An organelle that carries out photosynthesis in plants and algae.
20 key concepts, retrieval questions and a learning checkpoint.
Grades 6–10Do not assume every cell has every organelle. Bacterial cells have ribosomes but no membrane-bound nucleus.
Grades 6–1020 key concepts, retrieval questions and a learning checkpoint.
Grades 5–10Food-web arrows show the direction of energy transfer: from the food organism to the organism eating it.
Grades 5–1020 key concepts, retrieval questions and a learning checkpoint.
Grades 9–12Dominant does not mean more common, stronger or better. A simple genetic model may not describe a complex human trait.
Grades 9–12In these exercises an arrow points from a food source to the organism that eats it.
Grades 5–8In these exercises an arrow points from a food source to the organism that eats it.
Grades 5–8These questions assume one gene with alleles A and a, complete dominance, and equally likely allele transmission.
Grades 8–11These questions assume one gene with alleles A and a, complete dominance, and equally likely allele transmission.
Grades 8–11Enzymes increase reaction rate by providing a pathway with a lower activation-energy barrier.
Grades 10–12Enzymes increase reaction rate by providing a pathway with a lower activation-energy barrier.
Grades 10–12These questions use one gene with two alleles, A and a, and complete dominance where stated.
Grades 8–12These questions use one gene with two alleles, A and a, and complete dominance where stated.
Grades 8–12