Q: What is the correct chemical equation for the formation of oxyhaemoglobin in red blood cells?

$$\text{haemoglobin} + \text{oxygen} \rightarrow \text{oxyhaemoglobin}$$

Question 1

Which of the following best describes the role of haemoglobin in red blood cells?

Accepted Answer

It binds with oxygen to form oxyhaemoglobin for oxygen transport.

Question 2

What is the correct chemical equation for the formation of oxyhaemoglobin in red blood cells?

Accepted Answer

$$	ext{haemoglobin} + 	ext{oxygen} ightarrow 	ext{oxyhaemoglobin}$$

Question 3

Which process allows phagocytes to ingest and destroy bacteria?

Accepted Answer

Phagocytosis

Question 4

A patient receives a vaccine containing dead microorganisms. Which type of immunity is being induced?

Accepted Answer

Artificial active immunity

Question 5

Which of the following best explains why memory cells are important in immunity?

Accepted Answer

They enable a faster and more effective secondary immune response.

Question 6

Which statement correctly describes the function of lymphocytes?

Accepted Answer

They produce antibodies that bind to antigens on pathogens.

Question 7

A person is exposed to the measles virus for the second time. Which immune response is most likely to occur?

Accepted Answer

Secondary immune response with rapid antibody production

Question 8

Which of the following is a correct description of an antigen?

Accepted Answer

A chemical marker on the surface of pathogens recognized by antibodies

Question 9

Which type of vaccine is used to prevent tetanus?

Accepted Answer

A vaccine containing modified toxins of the bacteria

Question 10

If a person is vaccinated with a genetically engineered bacterium carrying antigens of a disease-causing organism, what is the expected immune response?

Accepted Answer

The body will produce memory cells specific to the antigens.

Question 11

Which of the following best describes the difference between phagocytes and lymphocytes?

Accepted Answer

Phagocytes engulf pathogens, while lymphocytes produce antibodies.

Question 12

A person who recovers from chickenpox is less likely to get the disease again due to:

Accepted Answer

The presence of memory cells that enable a rapid secondary immune response.

Question 13

Which of the following is NOT a method by which vaccines can be produced?

Accepted Answer

Using only antibodies

Question 14

Which of the following best explains why the secondary immune response is faster than the primary response?

Accepted Answer

Memory cells quickly recognize antigens and stimulate rapid antibody production.

Question 15

Which of the following is a real-world example of artificial immunity?

Accepted Answer

A person receives a polio vaccine and becomes immune without contracting the disease.

Question 16

Which of the following is the main function of antibodies produced by lymphocytes?

Accepted Answer

To bind to antigens and help destroy pathogens

Question 17

A person is exposed to a pathogen and develops immunity without medical intervention. This is an example of:

Accepted Answer

Natural active immunity

Question 18

Which of the following best describes the role of pseudopodia in phagocytes?

Accepted Answer

They help phagocytes change shape and engulf microorganisms.

Question 19

Which of the following is a plausible consequence if memory cells were not formed after an infection?

Accepted Answer

The secondary immune response would be slow and less effective.

Question 20

Which of the following best explains why vaccination is effective in preventing disease?

Accepted Answer

It introduces antigens that stimulate the production of memory cells and antibodies.

Blood Cells and Immunity: Structure, Function, and Defense Mechanisms

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