DAT Biology (ALL Practice Exam Questions With Verified Answers)

DAT Biology (ALL Practice Exam Questions With Verified Answers) 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? - answerBacteria 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? - answerBryophyte In the fetal circulatory system, the ductus venosus allows blood to bypass? - answerLiver What would be the expected outcome if the acrosome of a mature sperm failed to develop? - answerInability to penetrate zona pellucida IgA - answerFound in muccous, salivia, tears, and breast milk. Protects against pathogens IgD - answerPart of the B cell receptor. Activates basophils and mast cells IgE - answerProtects against parasitic worms. Responsible for allergic reactions IgG - answerSecreted by plasma cells in the blood. Able to cross the placenta into the fetus IgM - answerMay 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? - answerAcrosomal reaction Describe how the endometrium is maintained after implantation? - answerthe placenta secretes chorionic gonadotrophin (hCG) Regulation of the Lac Operon? - answerWhen 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 ATP C. Most glycogen stores are in muscle D. Fat is preferentially utilized as an energy source over carbohydrates