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TEAS 7 Science Custom TEAS Science Practice Test 1 Which of the following are used to deter...

Which of the following are used to determine a person’s DNA sequence?

A. Genes

B. Enzymes

C. Hormones

D. Blood types

Answer Explanation:

A gene is the basic physical and functional unit of heredity and it is the DNA that make up genes. Enzymes are biological catalysts that speed up metabolic and cellular reactions in our bodies. Hormones are responsible for controlling the action of certain cells or organs in our bodies. Blood types are of four types, A, B, AB, and O.

Therefore, the Correct Answer is A.

More Questions on TEAS 7 Science

  • Q #1: A myocardial infarction affects which of the following blood vessels of the heart?

    A. Aorta

    B. Vena cava

    C. Pulmonary

    D. Coronary

    Answer Explanation

    A myocardial infarction refers to heart attack, which result from blockage of blood flowing into the heart.

    Blocking is caused by the deposition of fat or cholesterol that forms plaque on the surface of coronary arteries, which supply blood to the heart.

  • Q #2: Which of the following processes does atmospheric pressure play a role in?

    A. Pulmonary Ventilation

    B. Photosynthesis

    C. Osmosis

    D. Evaporation

    Answer Explanation

    Among the choices provided, only one process is directly influenced by atmospheric pressure:

    Pulmonary Ventilation (Correct): Pulmonary ventilation, also known as breathing, is driven by pressure differences between the lungs and the atmosphere. Atmospheric pressure plays a pivotal role in this process by facilitating the movement of air into and out of the lungs.

    The other options mentioned in the choices—Photosynthesis, Osmosis, and Evaporation—are not primarily influenced by atmospheric pressure. While atmospheric pressure can indirectly affect certain aspects of these processes, it is not a dominant factor in their mechanisms.

  • Q #3: Which of the following best describes the result of using a catalyst in a chemical reaction?

    A. A more desirable product is often formed

    B. The reaction is completed in a shorter amount of time

    C. The yield of product is increased

    D. A greater amount of energy is released by the reaction

    Answer Explanation

    A catalyst is substance that speeds up the rate of converting reactants to products. They do by decreasing the activation energy of a reaction. If a catalyst increases the rate of reaction, then it means that the reaction takes a smaller time to come into completion.
    Catalysts can be metals, ions or biological also known as enzymes. Catalysts are not consumed when the reaction is taking place.

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