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TEAS 7 Science Custom TEAS Science Practice Test 1 Which of the following processes does at...

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.

Therefore, the Correct Answer is A.

More Questions on TEAS 7 Science

  • Q #1: Building blocks of proteins Which of the following organic molecules contain both an amine and carboxyl group?

    A. Lipids

    B. Proteins

    C. Cellulose

    D. Chitin

    Answer Explanation

    The basic building block of the protein is ammonia, which comprises of ammino group -NH2 and a carboxyl group, -COOH.

  • Q #2: Practice Question An atom has 14 protons and 20 neutrons. What is its atomic number?

    A. 20

    B. 17

    C. 10

    D. 14

    Answer Explanation

  • Q #3: Gel electrophoresis To separate genomic DNA fragments by size, which of these laboratory methods is most useful?

    A. Filtration

    B. Titration

    C. Electrophoresis

    D. Spectrophotometry

    Answer Explanation

    Electrophoresis is a lab method that is commonly used to separate charge molecules based on their size. Some of the charged molecules include DNA, RNA, and proteins.

  • Q #4: 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.

  • Q #5: Which of the following indicates the function of sodium bicarbonate released by the pancreas?

    A. Sodium bicarbonate inhibits peristalsis

    B. Sodium bicarbonate is a protease that digests carbohydrates

    C. Sodium bicarbonate stimulates the pyloric sphincter

    D. Sodium bicarbonate neutralizes the acidity of chyme

    Answer Explanation

    Sodium bicarbonate is an alkaline solution, which is released by the pancreas. Chyme is acidic coming from the stomach is neutralized by sodium bicarbonate to protect the duodenum. 

  • Q #6: Which of the following statements best supports the hypothesis that viruses can cause cancer?

    A. Cellular DNA has sequences related to viral sequences

    B. Cancerous and normal cells share genetic sequences

    C. Genes that regulate cell division are found in some viruses

    D. Viruses and cancer cells both replicate rapidly

    Answer Explanation

    Cancer is a condition caused by unregulated division of abnormal cells in parts of the body. For a virus to survive in an organism, it must enter into the host’s cell and take control of the cell’s most activities in order to be able to reproduce and replicate.

    Some of the viruses achieve this by inserting their DNA or RNA to that of the host cell. This has a highly likelihood of affecting the DNA or RNA of a host (living organism) which alters their genes, which may lead to host cells becoming cancerous.

    For this reason, viruses can cause cancer because the genes that regulate cell division in host cell are found in some viruses.

  • Q #7: Base your answer on the graph and on your knowledge of biology. Which is a true statement about the relationship between pH and enzyme action?

    A. All enzymes work best at a neutral pH.

    B. Adding more acid does not affect the rate of activity of an enzyme.

    C. Enzymes function only in a pH range of 4.0 to 5.5.

    D. The activity of an enzyme is affected by pH.

    Answer Explanation

  • Q #8: The Life Cycle of HIV Which of the following allows the AIDS virus, which contains RNA, to insert viral DNA into the DNA of a host T-cell after the AIDS virus enters the cell?

    A. Receptor proteins located on the surface of the virus

    B. The protein that makes up the capsid of the virus

    C. Reverse transcriptase, an enzyme encoded by the virus

    D. The phospholipids found on the envelope of the virus

    Answer Explanation

    The AIDS virus (HIV virus) is Class VI or Group VI in the Baltimore Classification. Based on the Baltimore Classification, this specifically involves the reverse transcriptase enzyme and it is encoded by the virus.

    This is the enzyme that will produce DNA molecules from the viral RNA. This is the mechanism involved where it will use the reverse transcriptase enzyme to insert viral DNA into the genetic material of the host cell.

  • Q #9: 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 #10: Punnett squares are used by geneticists to determine the probability of different offspring genotypes. In the one shown below, what letter(s) belong in the lower right box?

    A. AA

    B. Aa

    C. aA

    D. aa

    Answer Explanation

    From the given Punnett square, we can cross the genotypes of the two parents and established the phenotypes the offspring will have. The Punnett square is filled as:

     

    A

    a

    a

    Aa

    aa

    a

    Aa

    aa

    The requested answer is aa.

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