Practice C - Interaction and Interdependence 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.
Paper
Level
Question 1
SLPaper 1A
A community in ecology refers to:
Question 2
SLPaper 1A
A student measures the rate of yeast respiration by collecting CO₂ in a syringe over time. What is the best unit to express the result?
Question 3
SLPaper 1A
What is a defining feature of autotrophs?
Question 4
SLPaper 1A
EPSPs (excitatory postsynaptic potentials) are small depolarizations that accumulate to trigger an action potential in the postsynaptic cell.
Which feature of dendrites enhances this integration?
Question 5
SLPaper 1A
A nerve is made up of:
Question 6
SLPaper 1A
Based on the image, which numbered step represents the antigen-specific selection of a B-lymphocyte before clonal expansion occurs?
Question 7
SLPaper 1A
Which function is most associated with the brain, rather than the spinal cord?
Question 8
SLPaper 1A
Which statement best compares absorption and action spectra?
Question 9
HLPaper 1A
Some bacteria can synthesize the amino acid isoleucine from threonine, a process involving five enzymes ( to ) and four intermediary products (P, Q, R and S). The production of isoleucine is controlled by end-product inhibition.
Which statement describes this end-product inhibition?
Question 10
HLPaper 1A
The electron micrograph shows a transverse section through a myelinated neuron.
What process is facilitated by the presence of the structure labelled X?