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.

Q #1: The ________ circulation picks up oxygen for cellular use and drops off carbon dioxide for removal from the body.

A. pulmonary

B. interlobular

C. respiratory

D. bronchial
Answer Explanation

Our blood flow is separated into two major pathways, listed below:
1. Systemic circulation - this comes from the left side of the heart and pumps blood to all working tissues, including the brain, muscle, heart, and other organs, and then into the right side of the heart.
2. Pulmonary system - this comes from the right side of the heart, and pumps blood to the alveolar sacs within the lungs, and then into the left side of the heart
In pulmonary circulation: The pulmonary artery is a big artery that comes from the heart. It splits into two main branches, and brings blood from the heart to the lungs. At the lungs, the blood picks up oxygen and drops off carbon dioxide.
Q #2: 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 #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.

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

More Questions on TEAS 7 Science

Q #1: The ________ circulation picks up oxygen for cellular use and drops off carbon dioxide for removal from the body.

Answer Explanation

Q #2: Gel electrophoresis To separate genomic DNA fragments by size, which of these laboratory methods is most useful?

Answer Explanation

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

Answer Explanation

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