TEAS 7 science study guide free

TEAS 7 science study guide free Related

Review TEAS 7 science study guide free related questions and content

Which mineral is crucial for bone strength and is stored in bones and teeth?

  • A. Calcium
  • B. Iron
  • C. Magnesium
  • D. Potassium
Correct Answer: A

Rationale: Calcium is crucial for bone strength as it is a major mineral stored in bones and teeth. It plays a vital role in maintaining bone density and strength, making it essential for overall bone health. Calcium is essential for various physiological functions, including muscle contraction, nerve transmission, and blood clotting. Inadequate calcium intake can lead to conditions like osteoporosis, where bones become weak and brittle. Iron (Choice B) is important for transporting oxygen in the blood, but it is not stored in bones and does not play a significant role in bone strength. Magnesium (Choice C) is essential for bone health, but it is not primarily stored in bones and teeth. Potassium (Choice D) is crucial for various physiological functions, such as fluid balance and muscle function, but it is not a major mineral stored in bones and teeth for bone strength.

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How does RNA polymerase differ from DNA polymerase?

  • A. Both enzymes are identical in function and structure.
  • B. RNA polymerase does not require a primer to initiate RNA synthesis.
  • C. RNA polymerase can synthesize both RNA and DNA.
  • D. RNA polymerase can only synthesize RNA, unlike DNA polymerase.
Correct Answer: B

Rationale: Rationale:
A) This statement is incorrect. RNA polymerase and DNA polymerase are not identical in function and structure. They have different roles in the cell.
B) This statement is correct. Unlike DNA polymerase, RNA polymerase does not require a primer to initiate RNA synthesis. RNA polymerase can start the synthesis of RNA de novo.
C) This statement is incorrect. RNA polymerase is specialized for synthesizing RNA, not DNA. DNA polymerase is responsible for synthesizing DNA.
D) This statement is correct. RNA polymerase can only synthesize RNA, while DNA polymerase is responsible for synthesizing DNA.

Which structure in the female reproductive system is responsible for producing eggs (ova)?

  • A. Fallopian tubes
  • B. Ovaries
  • C. Uterus
  • D. Vagina
Correct Answer: B

Rationale: The correct answer is the ovaries. Ovaries are the primary reproductive organs in females responsible for producing eggs (ova) through a process known as oogenesis. Ova are released from the ovaries during ovulation and can be fertilized by sperm in the fallopian tubes. The uterus is where a fertilized egg implants and develops into a fetus, while the vagina serves as the birth canal and a site for sexual intercourse. Fallopian tubes are responsible for transporting eggs from the ovaries to the uterus and are the site where fertilization typically occurs. Therefore, while important for the reproductive process, the fallopian tubes do not produce eggs.

The kidneys are bean-shaped organs that perform several vital functions. Which of the following is NOT a primary function of the kidneys?

  • A. Filtering waste products from the blood
  • B. Regulating blood pressure
  • C. Producing red blood cells
  • D. Maintaining water balance in the body
Correct Answer: C

Rationale: The correct answer is C. The kidneys do not produce red blood cells. This function is carried out by the bone marrow. The primary functions of the kidneys include filtering waste products from the blood, regulating blood pressure, and maintaining water balance in the body. Red blood cells are produced in the bone marrow, not in the kidneys. Choices A, B, and D are incorrect as they are primary functions of the kidneys, which involve filtering waste products, regulating blood pressure, and maintaining water balance in the body, respectively.

What is the common name for the organic compound CH₃OH?

  • A. Methane
  • B. Ethanol
  • C. Methanol
  • D. Butanol
Correct Answer: C

Rationale: The common name for the organic compound CH₃OH is methanol. Methane (A) has the chemical formula CH₄. Ethanol (B) corresponds to the formula C₂H₅OH. Butanol (D) is a compound with the formula C₄H₉OH. The correct answer is C - Methanol, which is the common name for CH₃OH, while the other options correspond to different organic compounds with distinct formulas. Therefore, methanol is the correct choice when identifying the common name for the compound CH₃OH.

What factors can contribute to edema, a condition characterized by swelling due to a buildup of lymph fluid?

  • A. Regular exercise
  • B. Maintaining a healthy weight
  • C. Poor circulation or blockage in the lymphatic system
  • D. Proper hydration
Correct Answer: C

Rationale: Edema is caused by the accumulation of excess fluid in the body's tissues, leading to swelling. Poor circulation or blockage in the lymphatic system can contribute to the development of edema by impairing the body's ability to properly drain fluid. While regular exercise, maintaining a healthy weight, and proper hydration are crucial for overall health, they are not direct causes of edema. Poor circulation or blockage in the lymphatic system disrupts the normal balance of fluid in the body, resulting in edema. Therefore, the correct factor that can contribute to edema is poor circulation or blockage in the lymphatic system.

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