Question

Question 282 pts

Small, seasonal, antigenic changes on the lipid envelope of the influenza virus can often leads to an epidemic.

Group of answer choices

True

False

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Question 292 pts

Louis Pasteur is given credit for refuting the notion of spontaneous generation.

Group of answer choices

True

False

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Question 302 pts

Adaptive immunity responses are affected by prior exposure to the agent.

Group of answer choices

True

False

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Question 312 pts

Hay fever and asthma are examples of Type IV – Delayed cell-mediated hypersensitivities.

Group of answer choices

True

False

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Question 322 pts

Droplet transmission is considered transmission by direct contact.

Group of answer choices

True

False

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Question 332 pts

Herpes Simplex Virus -1 is transmissible with saliva and will persist for life.

Group of answer choices

True

False

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Question 342 pts

Secretions of sweat and sebaceous glands are essential to the normal microbial population of the skin.

Group of answer choices

True

False

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Question 352 pts

Helicobacter pylori produce a strong urease that allows it to survive in the harsh environment of the small intestine.

Group of answer choices

True

False

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Question 362 pts

This phase in the sewage treatment process is primarily a biological activity.

Group of answer choices

primary

secondary

tertiary

none of the above

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Question 372 pts

Which of the following is an example of a specific defense mechanism

Group of answer choices

skin

mucus membranes

antibodies

inflammation

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Question 382 pts

An organism isolated from a hot spring in an acidic environment is most likely a member of:

Group of answer choices

Eubacteria

Eukaryotes

Archea

Viruses

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Question 392 pts

The least number of bacteria can be found residing in/on the:

Group of answer choices

skin

mouth

small intestine

large intestine

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Question 402 pts

In aerobic respiration, the terminal electron acceptor is which of the following?

Group of answer choices

pyruvate

nitrate

NAD+

oxygen

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Question 412 pts

Which of the following statements is FALSE regarding bacterial infections of the lower respiratory system?

Group of answer choices

They are more common than infections of the upper respiratory system.

They are usually more serious than upper respiratory infections.

They are a frequent form of nosocomial infection.

Pneumonia, whooping cough, and TB are examples of lower respiratory infections.

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Question 422 pts

The main cells of cellular immunity.

Group of answer choices

B-lymphocytes

T-lymphocytes

neutrophils

macrophages

Answer 1

1. False- As the envelope is left outside and only the genome enters and antigenic changes i.e mutations in its genome can cause an epidemic.

2. True- Louis Pasteur is credited with conclusively disproving the theory of spontaneous generation with his famous swan-neck flask experiment. He subsequently proposed that “life only comes from life.”

3. True- Adaptive immunity is an immunity that occurs after exposure to an antigen either from a pathogen or a vaccination.

4. False- Haufevet and asthma are the examples of type I hypersensitivity

5. False- Droplet transmission is considered transmission by direct contact.

6. True- Herpes simplex virus (HSV) causes genital and oral lesions and is a life-long infection. HSV persists by retreating into ganglia (nerve-cell bodies) and lying dormant until reactivation whereupon the virus uses nerve fibres to relocate for replication and transmission. It can be spread by saliva.

7. True- Secretions of sweat and sebaceous glands are essential to the normal microbial population of the skin.

8. True- Helicobacter pylori, or H. pylori, is a spiral-shaped bacterium that grows in the mucus layer that coats the inside of the human stomach. To survive in the harsh, acidic environment of the stomach, H. pylori secretes an enzyme called urease, which converts the chemical urea to ammonia.

9. Secondary treatment

10. Antibodies