AS Biology Immunity

Which of the following does not act as a defence mechanism of the body?

• Antibodies

• Phagocytes

• Lymphocytes

• Antigens

Which enzyme do phagocytes use during phagocytosis?

• Lysozyme

• DNA helicase

• ATP synthase

• Amylase

Which of the following is an example of passive immunity?

• Previous exposure to the pathogen

• Vaccination by injection

• Breastfeeding

• Oral vaccination

A new highly infectious disease has developed. what would be the most effective way for a government to prevent further spread of the disease?

• Vaccinate only those at risk

• Develop a medicine to treat the disease

• Educate the population on how ti prevent spreading the disease

• Vaccinate a large percentage of the population

An enzyme inhibitor was introduced that prevented DNA replication. What effect would this have on humoral immunity?

• B cells would be unable to take up surface antigens

• B cells would be unable to produce plasma cells

• B cells would be unable to process antigens

• B cells would be unable to circulate in the blood

A person was infected with a structure that contained a cell wall made of murein and several flagella present. What would be an effective treatment against this?

• Antiviral drugs

• Vaccination

• Fungicidal cream

• Antibiotics

After an initial infection, B-cells recognize the measles virus. How is this helpful in human immune response?

• The B-cells use this recognition to defend the body against other pathogens, such as bacteria.

• The B-cells more quickly recognize and respond to any other virus that invades the body.

• The B-cells produce antibodies more quickly if the measles virus is encountered again.

• The B-cells transfer this recognition to T-cells, which will then devour the viruses.

The primary purpose of vaccines is to...

• Induce inflammation

• Activate the immune system to produce memory cells

• Stimulate killer T cells

• Initiate the innate immune response

Which is the correct definition for an antigen?

• A molecule that triggers an immune response

• A cell that triggers an immune response

• A protein that responds to an immune response

• A cell that responds to an immune response

After an initial infection, B-cells recognize the measles virus. How is this helpful in human immune response? 

• The B-cells use this recognition to defend the body against other pathogens, such as bacteria.
•  The B-cells more quickly recognize and respond to any other virus that invades the body.
• The B-cells produce antibodies more quickly if the measles virus is encountered again.
• The B-cells transfer this recognition to T-cells, which will then devour the viruses.