DAT Biology (ALL Practice Exam Questions)
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2024 Version
An organism is found during a biopsy of lung tissue. It is determined to belong to the genus
Streptococcus and is known to cause tuberculosis. What type of organism is this? - ✔✔Bacteria
A botanist has discovered a new plant and notes that it is predominantly found in its gametophyte form.
Which category does this plant most likely belong to? - ✔✔Bryophyte
In the fetal circulatory system, the ductus venosus allows blood to bypass? - ✔✔Liver
What would be the expected outcome if the acrosome of a mature sperm failed to develop? -
✔✔Inability to penetrate zona pellucida
IgA - ✔✔Found in muccous, salivia, tears, and breast milk. Protects against pathogens
IgD - ✔✔Part of the B cell receptor. Activates basophils and mast cells
IgE - ✔✔Protects against parasitic worms. Responsible for allergic reactions
IgG - ✔✔Secreted by plasma cells in the blood. Able to cross the placenta into the fetus
IgM - ✔✔May be attached to the surface of a B cell or secreted into the blood. Responsible for early
stages of immunity.
Which process immediately follows the penetration of the corona radiata by sperm? - ✔✔Acrosomal
reaction
