Biology

Human Immunity and Blood

2,096 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 biology simple nutrients into cells blood and its components components of blood composition of blood

Plasma do not contain

  1. Haemoglobin

  2. Water

  3. Blood cells

  4. Both A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

One half of blood is composed of red blood cells (consist of an oxygen-carrying protein called hemoglobin), white blood cells and platelets which are considered as solid part of blood and another half is composed of water, salts and proteins which is the fluid part of blood. The fluid part of blood is known as plasma. Hence plasma does not contain haemoglobin, blood cells.

So, the correct answer is 'Both A and C'.

Multiple choice biology simple nutrients into cells blood and its components components of blood composition of blood

Major component of blood plasma is

  1. Water

  2. Inorganic substances

  3. Organic substances

  4. Blood cells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

One half of blood is composed of red blood cells, white blood cells and platelets which are considered as solid part of blood and another half is composed of water, salts and proteins which is the fluid part of blood. The fluid part of blood is known as plasma. Plasma is a straw coloured, viscous fluid it has about 90-92% water and 6-8% proteins. Hence a major component of blood plasma is water.

So, the correct answer is 'Water'

Multiple choice biology simple nutrients into cells blood and its components components of blood composition of blood

Match the animals listed below with their nature of blood. Choose the answer which gives the correct combination of alphabets of the two columns.

Animals  Nature of blood
A. Man (p)  Plasma and cells are colourless
B. Earthworm (q) Plasms is colourless and nucleated 
C. Cockroach (r) Plasma is colourless and enucleated RBC
D. Frog (s) Plasma is red and nucleated, colourless RBC
(t) Plasma and RBC have haemoglobin


  1. A- p, B- s, C- q, D- r

  2. A- t, B- r, C- p, D- s

  3. A- r, B- s, C- p, D- q

  4. A- s, B- t, C- r, D- q
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

blood is the bodily fluid that is responsible to carry nutrients and oxygen to the body cells and transports the metabolic waste materials from these. It contains antibodies, nutrients and oxygen. However, the nature of blood is different in different organisms. In human beings, 55% of blood is plasma which is made up of 92% water and  7% proteins and salts and carry RBC's WBC's and Platelets. The RBC's are without nuclei. In the earthworm the  blood consists of ameboid cells and hemoglobin dissolved in the plasma. Cockroaches lack heamoglobin in their blood. are thus white. Like all amphibians frogs have red blood cells with a distinct nucleus.

Multiple choice biology simple nutrients into cells blood and its components components of blood composition of blood

Globulins contained in human blood plasma are primarily involved in

  1. Defence mechanisms of the body

  2. Osmotic balance of the body fluids

  3. Oxygen transport in the blood

  4. Clotting of the blood
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The three proteins found in human blood plasma are :
Albumin - which is involved in controlling the osmotic balance.
Globulins - that produce antibodies, and is thus, involved in defence purposes.
Fibrinogens - that helps in clotting of blood.
Thus, the correct answer is option (A).

Multiple choice biology simple nutrients into cells blood and its components components of blood composition of blood

The matrix of the plasma contains

  1. Water and Salts

  2. Blood cells

  3. Only platelets

  4. Only RBCs and WBCs
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Plasma is the extracellular matrix which holds the blood cells. It makes 55 percent of the total blood volume. It consists of 95% of water and 8% of proteins. The protein like serum albumins, globulins, fibrinogen etc. In addition, it also contains glucose, electrolytes and clotting factors. Thus, the correct answer is option A.

Multiple choice biology simple nutrients into cells blood and its components components of blood composition of blood

Blood proteins connected with antibodies are

  1. Albumins
  2. $\beta$-globulins

  3. Gamma globulins
  4. $\alpha$-globulins
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
One half of blood is composed of water, salts, and proteins which is the fluid part of blood. The fluid part of blood is known as Plasma. Plasma is a straw-colored, viscous fluid it has about 90-92% water and 6-8% proteins.  Fibrinogen, globulins, and albumins are the major proteins present in plasma. Hence Globulin is a plasma protein. Globulins are of three types alpha, beta, and gamma. Gamma globulins are blood proteins connected with antibodies.
So, the correct answer is 'Gamma globulins'.
Multiple choice biology simple nutrients into cells blood and its components components of blood composition of blood

Properdin is

  1. Neurohormone for stimulating body activities

  2. Plasma protein that destroys foreign RBC's

  3. Plasma protein involved in defence against certain bacteria and viruses

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Properdin is a gamma globulin protein present in the serum of blood. Properdin participates in certain immune functions such as it destroys foreign RBC's and is involved in the defense against certain bacteria and viruses.

So, the correct answer is 'Both B and C'.

Multiple choice biology simple nutrients into cells blood and its components components of blood composition of blood

The liquid portion of the blood is called as 

  1. Plasma

  2. Leucocyte

  3. Serum

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Plasma is the liquid component of blood. It comprises 55 percent of the total blood volume. Plasma is composed of 90 percent water with antibodies, coagulation factors, and other substances such as electrolytes, lipids, and proteins required for maintaining the body. 

Multiple choice biology simple nutrients into cells blood and its components components of blood composition of blood

Which of the following is not a component of plasma?

  1. Water

  2. Globulins

  3. Fibrinogen

  4. Platelets
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Plasma is a fluid component of blood. It comprises 55% of the total blood volume. Plasma is composed of 90% water with antibodies, coagulation factors, globulins, fibrinogens and it also contains electrolytes, lipids and proteins required for maintaining the body. Platelets are the cellular components of the blood
So, the correct answer is 'Platelets'
Multiple choice biology simple nutrients into cells blood and its components components of blood composition of blood

What does blood consists of?

  1. 60% plasma, 40% corpuscles

  2. 40% plasma, 60% corpuscles

  3. 25% plasma, 75% corpuscles

  4. 90% plasma, 10% corpuscles
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Plasma is the fluid component in which the blood cells are suspended. These blood cells include 

Red blood cells (erythrocytes) - carry oxygen from the lungs to the rest of the body. 
White blood cells (leukocytes) - help fight infections and aid in the immune process. 
Platelets (thrombocytes) - help in blood clotting. 
Whole blood contains red cells, white cells, and platelets (~45% of volume) suspended in plasma (~55% of volume). Thus, option A is correct.