DAT Biology (ALL Practice Exam Questions) with Certified Solutions
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 1 / 2
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
Describe how the endometrium is maintained after implantation? ✔✔the placenta secretes chorionic gonadotrophin (hCG)
Regulation of the Lac Operon? ✔✔When allolactose is present, it binds to and deactivates a repressor protein
Which of the following statements is true about energy use by the body?
- Protein is preferentially utilized as an energy source over fat
- Fats have the greatest yield of ATP
- Most glycogen stores are in muscle
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