Examlex
Which of the following statements describe a component of the clonal selection theory of how the adaptive immune system functions?
I. Each lymphocyte has a unique membrane receptor that recognizes one antigen.
II. When the lymphocyte binds an antigen, it is activated and begins dividing to form many identical copies of itself.
III. Cloned lymphocytes have slight differences and are selected by the spleen for removal if they do not bind an antigen.
IV. Cloned cells descend from an activated lymphocyte and persist even after the pathogen is eliminated.
Chromosomes
Structures within cells that carry genetic information in the form of genes.
Gene Replication
The biological process by which a cell copies its DNA, ensuring each daughter cell receives an identical set of genetic material.
Molecular Structure
Describes the arrangement and bonds between atoms within a molecule, determining its chemical properties and behavior.
Mutation
An alteration in the molecular structure of an individual’s DNA.
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