TEAS Practice Test Science

Correct Answer: B

Rationale: Hydrophobic proteins often provide structural support in the body. This is because hydrophobic proteins have non-polar amino acids that interact with each other to form stable structures. These proteins are commonly found in cell membranes, connective tissues, and structural proteins like collagen. They are crucial for maintaining the shape and integrity of cells and tissues. Incorrect Choices: A: Digestive enzymes - Hydrophobic proteins are not commonly involved in digestive processes. C: Carry oxygen molecules - Oxygen-carrying proteins like hemoglobin are typically hydrophilic, not hydrophobic. D: Store energy - Energy storage is usually performed by molecules like carbohydrates and lipids, not hydrophobic proteins.

Correct Answer: C

Rationale: The correct answer is C: Skull. The axial skeleton consists of bones along the central axis of the body, including the skull. The skull protects the brain and is a key part of the axial skeleton. The other choices - A (Femur), B (Humerus), and D (Pelvis) are all part of the appendicular skeleton, which includes the bones of the limbs and girdles. The femur is the thigh bone, the humerus is the upper arm bone, and the pelvis is part of the hip bone, all of which are not considered part of the axial skeleton.

Correct Answer: B

Rationale: The rib cage protects the vital organs such as the lungs and heart by providing a sturdy barrier against external impact. The ribs act as a shield, preventing injuries to these crucial organs. Additionally, the rib cage also aids in the process of respiration by expanding and contracting to allow the lungs to inflate and deflate during breathing. Choices A, C, and D are incorrect because the primary function of the rib cage is to protect the lungs and heart, not the digestive organs, support movement, or regulate body temperature.

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: Meiosis Prophase I. Crossing over occurs during Prophase I of meiosis, specifically during the substage called pachytene. This is when homologous chromosomes pair up and exchange genetic material. This process creates genetic diversity among offspring. Choice A, Mitosis Prophase, is incorrect because crossing over does not occur during mitosis, as homologous chromosomes do not pair up in mitosis. Choice C, Meiosis Prophase II, is incorrect because crossing over only occurs during Prophase I, not Prophase II. Choice D, Interphase, is incorrect because crossing over does not occur during interphase, as it is a phase where the cell prepares for division and DNA replication occurs.