DAT Biology (ALL Practice Exam Questions & Answers) 2024/2025

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? - CORRECT ANSWER-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? - CORRECT ANSWER-Bryophyte In the fetal circulatory system, the ductus venosus allows blood to bypass? - CORRECT ANSWER-Liver What would be the expected outcome if the acrosome of a mature sperm failed to develop? - CORRECT ANSWER-Inability to penetrate zona pellucida IgA - CORRECT ANSWER-Found in muccous, salivia, tears, and breast milk. Protects against pathogens IgD - CORRECT ANSWER-Part of the B cell receptor. Activates basophils and mast cells IgE - CORRECT ANSWER-Protects against parasitic worms. Responsible for allergic reactions IgG - CORRECT ANSWER-Secreted by plasma cells in the blood. Able to cross the placenta into the fetus IgM - CORRECT ANSWER-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? - CORRECT ANSWER-Acrosomal reaction Describe how the endometrium is maintained after implantation? - CORRECT ANSWER-the placenta secretes chorionic gonadotrophin (hCG) Regulation of the Lac Operon? - CORRECT ANSWER-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? A. Protein is preferentially utilized as an energy source over fat B. Fats have the greatest yield of