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Pathogens Which of the following microorganisms lack their own metabolic pathways and can only reproduce inside of a host cell?

A. Bacteria

B. Viruses

C. Helminths

D. Protozoa

Answer Explanation:

The disease-causing microorganisms are known as pathogens, which include bacteria, fungi, protozoa, worms, viruses and prions. These organisms have distinguishing cell structures from each other. The most notable difference between viruses and other pathogens is that viruses lack a metabolism mechanism of their own and ability to produce proteins encoded by their DNA or RNA. However, they viruses rely on machinery of the host cell to produce their proteins and replicate their genomes.

Therefore, the Correct Answer is B.

More Questions on TEAS 7 Science

  • Q #1: An atom of lead (Pb) has a mass number of 207. How many neutrons are in the nucleus?

    A. 130

    B. 125

    C. 82

    D. 84

    Answer Explanation

    We find the number of neutrons as follows

    Number of neutrons

                = mass number – atomic number

                = 207 – 82

                = 125 neutrons

  • Q #2: 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 #3: Pathogens Which of the following microorganisms lack their own metabolic pathways and can only reproduce inside of a host cell?

    A. Bacteria

    B. Viruses

    C. Helminths

    D. Protozoa

    Answer Explanation

    The disease-causing microorganisms are known as pathogens, which include bacteria, fungi, protozoa, worms, viruses and prions. These organisms have distinguishing cell structures from each other. The most notable difference between viruses and other pathogens is that viruses lack a metabolism mechanism of their own and ability to produce proteins encoded by their DNA or RNA. However, they viruses rely on machinery of the host cell to produce their proteins and replicate their genomes.