Practice A2.2 Cell structure with authentic IB Biology exam questions for both SL and HL students. This question bank mirrors Paper 1A, 1B, 2 structure, covering key topics like cell biology, genetics, and ecology. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.
All cells possess a plasma membrane and DNA. What would be the most valid explanation for this structural conservation across all life forms?
Immunofluorescence microscopy is used to identify specific proteins in cells. What key feature allows this method to achieve high specificity?
Which structure is found in a Gram-positive eubacterium but not in a eukaryotic cell?
A unicellular organism moves in response to a stimulus and divides to form two identical cells. Which two functions of life are being demonstrated?
Cells maintain cytoplasmic conditions that allow life processes to occur. What is the primary chemical characteristic of cytoplasm that enables this?
Eukaryotic cells contain membrane-bound organelles. Which structure is directly involved in packaging and modifying proteins?
Which feature would be present in a plant cell but not in an animal or fungal cell?
A bacterial cell is observed to have a cell wall, 70S ribosomes, and circular DNA not enclosed by a membrane. What conclusion is best supported by this evidence?
The nucleus of a eukaryotic cell contains chromosomes. What distinguishes eukaryotic chromosomes from prokaryotic genetic material?
What distinguishes the DNA in a typical prokaryotic cell?