Microbes and Disease

If a person is suffering from a severe infection caused by bacteria, which solution might a doctor propose?

• antibiotics

• exercise

• surgery

• vaccination

A female mosquito acts as a carrier for the organism that causes malaria. The mosquito transfers the organism into the human body as it bites. Which term best describes the mosquito?

• carrier

• mutagen

• parasite

• vector

The disease strep throat is caused by a bacterial infection. The infected person carries the germs in the mouth and nasal fluid. Symptoms can include a high fever, a sore throat, and a skin rash. Which action could spread the disease?

• washing hands properly with soap

• using tissue for coughing and sneezing

• allowing an infected person to attend school

• keeping separate utensils for the infected person

What would probably happen if Demario shared a drinking glass with his best friend who was sick with the flu and had a fever?

• Demario would develop immunity to the flu and not get sick.

• Demario would get sick with a different strain of the flu.

• Demario would develop a fever, but no other flu symptoms.

• Demario would become sick with the flu within a few days.

The diagram shows four different microbes.

Which microbe would best be characterized as nonliving?

• 1

• 2

• 3

• 4

A group of friends attended a festival where food was served. After the event, several individuals developed the same symptoms: nausea, vomiting, and stomach cramps. The table shows the foods eaten and the people who became sick.

Which explanation most likelydescribes how the people became sick?

• Tom contracted a virus and spread it to the other individuals who also became sick.

• The barbecue sandwiches were improperly cooked and caused food poisoning.

• The salad was contaminated with the Salmonella bacteria.

• The sick individuals were exposed to a fast-acting mutagen.

The diagram shows one common shape for a virus.

What is the principle role of the structures indicated by the arrows?

• disease transmission

• viral movement

• to help attach to a host cell

• to recognize a foreign virus

The diagram shows the amount of bacteria present at several time points as it divides.

Which number most accuratelypredicts the amount of bacteria that would be counted at 80 minutes?

• 4

• 8

• 16

• 32

Tags

NGSS.MS-LS2-1

A student became ill on three occasions throughout the year. Each time, he was prescribed the same antibiotics since he was diagnosed with the same illness. What will likely happen if the student becomes ill again, and the same antibiotics are prescribed?

• The antibiotics which were effective before will still work because bacteria never alter their DNA sequences.

• The antibiotics which were effective before may not work this time because bacteria undergo mutations.

• The student will not require the prescription because the antibiotics helped him build up immunity.

• The student will need twice the dosage of antibiotics to fight the same level of infection due to resistance.

Use the diagram to answer the question.

The previously uninfected human becomes infected with Malaria. Which term best describes the mosquito?

• carrier

• mutagen

• parasite

• vector