TEAS Practice Test Science

Correct Answer: D

Rationale: The correct answer is D: Temporal lobe. The temporal lobe is responsible for processing auditory sounds as it contains the primary auditory cortex. This area interprets and processes sound information received from the ears. The frontal lobe (A) is involved in higher cognitive functions, the occipital lobe (B) is responsible for processing visual information, and the parietal lobe (C) is involved in sensory processing and spatial awareness. Therefore, the temporal lobe is the correct choice for processing auditory sounds.

Correct Answer: B

Rationale: The correct answer is B: Skeletal muscle. Skeletal muscles are attached to bones and responsible for moving the skeleton through voluntary contractions. They are under conscious control, making them voluntary muscles. Cardiac muscle (A) is found in the heart and responsible for pumping blood. Smooth muscle (C) is found in organs and blood vessels, responsible for involuntary movements. Voluntary muscle (D) is a general term that can refer to both skeletal and smooth muscles, but in this context, it does not specifically address moving the skeleton.

Correct Answer: B

Rationale: The correct answer is B: Fibrous. Fibrous joints connect bones of the skull with fibrous tissue, providing stability and limited movement. Synovial joints (Choice A) have a joint cavity with synovial fluid for movement but aren't found in the skull. Cartilaginous joints (Choice C) connect bones with cartilage and allow slight movement, not commonly found in the skull. Ball-and-socket joints (Choice D) allow the widest range of motion and are not present in the skull. Therefore, the fibrous joint is the most suitable type for connecting the bones of the skull.

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.

Correct Answer: B

Rationale: The correct answer is B: White blood cells. White blood cells are a crucial component of the immune system as they play a key role in defending the body against infections and diseases. They help identify and destroy pathogens, produce antibodies, and regulate the immune response. Red blood cells (A) are responsible for transporting oxygen, platelets (C) are involved in blood clotting, and plasma (D) is the liquid component of blood, but they are not directly involved in the immune response. Therefore, white blood cells are the correct choice for being a component of the immune system.