TEAS Practice Test Science

Correct Answer: B

Rationale: The correct answer is B: To secrete digestive enzymes. The pancreas secretes enzymes such as amylase, lipase, and protease that aid in breaking down carbohydrates, fats, and proteins in the small intestine. This process is crucial for proper digestion and absorption of nutrients. Choice A is incorrect because the pancreas does not secrete bile, which is produced by the liver. Choice C is incorrect because the absorption of nutrients primarily occurs in the small intestine, not the pancreas. Choice D is incorrect as waste transportation is mainly handled by the intestines and kidneys, not the pancreas.

Correct Answer: C

Rationale: The correct answer is C: Natural Killer cells. Natural Killer cells are part of the innate immune response as they can recognize and eliminate infected or abnormal cells without prior exposure. B-cells and cytotoxic T-cells are part of the adaptive immune response, requiring specific antigens to respond. Antigen-Presenting Cells play a crucial role in initiating the adaptive immune response by presenting antigens to T-cells. Therefore, Natural Killer cells are the only cells listed that belong to the innate immune response.

Correct Answer: D

Rationale: The correct answer is D: Takes shape of container. Liquids do not have a fixed shape but take the shape of the container they are in due to the particles being able to flow and move past each other. Choice A is incorrect as liquids have moderate atomic attraction, not high. Choice B is incorrect as liquids have a fixed volume but not a fixed shape. Choice C is incorrect as liquids can have varying pressures depending on the conditions.

Correct Answer: C

Rationale: The correct answer is C: The bladder. The bladder is located in the pelvic cavity, specifically in the lower part of the abdomen. It is a hollow organ that stores urine before it is expelled from the body. The kidneys (A) are located in the upper abdominal area, the colon (B) is part of the large intestine and extends from the cecum to the rectum, and the rectum (D) is the final part of the large intestine before the anus. Therefore, the bladder is the only structure among the choices that is specifically located in the pelvic cavity.

Correct Answer: B

Rationale: The correct answer is B: It runs 3' to 5'. The antisense strand of DNA runs in the opposite direction to the sense strand. This is because DNA strands run antiparallel to each other, with one running 5' to 3' and the other running 3' to 5'. The antisense strand serves as a template for RNA synthesis during transcription, where RNA polymerase reads the antisense DNA strand and synthesizes an RNA molecule that is complementary to it. Choice A is incorrect because the sense strand runs 5' to 3'. Choice C is incorrect because the antisense strand is not directly involved in replication; it is mainly involved in transcription. Choice D is incorrect because the direction DNA is stored does not depend on the antisense strand.