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. Viruses and cancer cells both replicate rapidly.

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

Answer Explanation:

Viruses can cause cancer by inserting their genetic material into the host cell's DNA, disrupting the normal regulation of cell division and growth. This process is called viral oncogenesis. Some viruses, such as human papillomavirus (HPV) and hepatitis B virus (HBV), are known to cause certain types of cancer in humans. Genes that regulate cell division are found in some viruses. This statement implies that some viruses have the ability to alter the host cell's genes and induce cancerous changes.

Therefore, the Correct Answer is D.

Q #1: Which of the following best describes the result of using a catalyst in a chemical reaction?

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

B. The yield of product is increased.

C. A greater amount of heat energy is released by the reaction.

D. A more desirable product is often formed.

Answer Explanation

A catalyst is a substance that lowers the activation energy of a chemical reaction, which means that it allows the reaction to proceed faster without being consumed or changed itself. A catalyst does not affect the equilibrium of a reaction, so it does not change the amount or the type of product that is formed.
Q #2: Which of the following substances is responsible for donating H+ ions to act as a buffer when blood pH rises?

A. Carbon dioxide

B. Carbonic acid

C. Oxygen

D. Carbon monoxide

Answer Explanation

A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. In the human body, blood is an important buffer that helps maintain a stable pH of about 7.4. One of the main components of the blood buffer system is the bicarbonate buffer, which involves the equilibrium between carbon dioxide (CO2), carbonic acid (H2CO3), and bicarbonate ions (HCO3-). When blood pH rises, meaning it becomes more basic, the bicarbonate buffer can donate H+ ions to lower the pH and restore the balance. The substance that donates H+ ions in this case is carbonic acid, which dissociates into H+ and HCO3-. Therefore,
Q #3: Which of the following is the main function of centrosomes in animal cells?

A. Organelle trafficking

B. Pathogen digestion

C. Microtubule organization

D. Cytoplasm formation

Answer Explanation

Centrosomes are small structures that are found near the nucleus of animal cells. They consist of two centrioles that are surrounded by a protein matrix called the pericentriolar material. The main function of centrosomes is to organize the microtubules, which are long, hollow tubes that form part of the cytoskeleton. Microtubules are involved in many cellular processes, such as cell division, cell movement, and intracellular transport. Centrosomes act as the main microtubule-organizing centers (MTOCs) in animal cells, meaning that they nucleate and anchor the microtubules

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Which of the following statements best supports the hypothesis that viruses can cause cancer?

More Questions on TEAS 7 Science

Q #1: Which of the following best describes the result of using a catalyst in a chemical reaction?

Answer Explanation

Q #2: Which of the following substances is responsible for donating H+ ions to act as a buffer when blood pH rises?

Answer Explanation

Q #3: Which of the following is the main function of centrosomes in animal cells?

Answer Explanation

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