Biology

Human Immunity and Blood

2,051 Questions

Human immunity and blood questions cover the physiological mechanisms protecting the body against diseases and the components of blood. Topics include blood groups, cell mediated immunity, monoclonal antibodies, and blood coagulation. These biology topics frequently appear in general science sections of competitive exams.

Blood groupsCell mediated immunityMonoclonal antibodiesBlood coagulationCancer immunology

Human Immunity and Blood Questions

Multiple choice

Haldane effect is associated with

  1. white blood cells

  2. haemoglobin

  3. lymph

  4. platelets
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Haldane effect named after the scientist who first described it and it states that deoxygenated haemoglobin has more affinity for carbon-di-oxide than oxygenated haemoglobin.

Multiple choice

Which of these is an allergic inflammation of the nasal airways?

  1. Carotenemia

  2. Marasmus

  3. Hay Fever

  4. Allergic conjunctivitis

  5. Bilirubin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Allergic rhinitis is an allergic inflammation of the nasal airways. When caused by pollens of any plants, it is called pollinosis, and if specifically caused by grass pollens, it is known as hay fever.

Multiple choice

Formation of leucocytes takes place in _______________.

  1. pancreas

  2. lungs

  3. The spleen

  4. The kidneys

  5. The liver
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Leucocytes are produced in the spleen or yellow bone marrow and when worn out, they disintegrate in the blood stream and get engulfed by phagocytes.

Multiple choice

Which of the following autoimmune disorders leads to the depigmentation of patches of skin?

  1. Transverse myelitis

  2. Ulcerative colitis

  3. Vitiligo

  4. Wegener's granulomatosis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Vitiligo is a disorder that causes depigmentation of patches of skin. It occurs when melanocytes, the cells responsible for skin pigmentation, die or are unable to function. The cause of vitiligo is unknown, but research suggests that it may arise from autoimmune, genetic, oxidative stress, neural, or viral causes.

Multiple choice

Which of the following is a cytokine barrier?

  1. Lysozyme

  2. Macrophages

  3. Monocytes

  4. Interferon
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When cells are infected by a virus, they produce small amounts of anti microbial proteins called interferons that increase the resistance of neighbouring cells to infection by the same or other viruses. Interferon is a cytokine barrier.

Multiple choice

Monoclonal antibodies are ____________________.

  1. antibodies that can be used only once

  2. non-functional antibodies

  3. antibodies produced by hybridoma technique

  4. antibodies involved in auto-immunity
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Monoclonal antibodies are antibodies produced by hybridoma technique.

Multiple choice

Which is the most common blood group among the Asians?

  1. A

  2. B

  3. AB

  4. O
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Blood group B is the most prevalent among Asian populations, particularly in East Asia. Group A (A) is common in Europe, Group AB (C) is the rarest worldwide, and Group O (D) is universal but not the most common in Asia specifically. Distribution varies by ethnicity and geography.