Tag: biology

Questions Related to biology

Blood maintains homoestasis in body by

  1. Replenishment of $O _2$ and nutrients, elimination of wastes

  2. Replenishment of $O _2$ and elimination of $CO _2$

  3. Maintenance of sugar level, conversion of amino acids into urea and destruction of worn out RBCs

  4. Maintenance of ion concentration in blood and body fluids by eliminating nitrogenous wastes.


Correct Option: A

Plasma proteins perform

  1. Nutritive function

  2. Physicochemical function

  3. Transport function

  4. All the above.


Correct Option: D
Choose the correct option regarding the statements.
1. Plasma constitutes 45% of blood.
2. Albumin is plasma protein involved in osmotic balance.
3. Blood clotting factors are present in blood.
4. Plasma without clotting factors is serum.
5. Minerals are not found in blood.
  1. 1-4 correct, 5 wrong

  2. 1-2 correct, 3, 4, 5 wrong

  3. 2, 3, 4 correct, 1 and 5 wrong

  4. 2 and 4 correct, 1, 3, 5, wrong

  5. 1 and 5 correct, 2, 3, 4 wrong


Correct Option: C
Explanation:
1. Blood plasma is the fluid portion of blood and constitutes about 55- 60% of the blood.
2. Albumin is the smallest protein present in blood plasma. It maintains osmotic pressure of plasma and also maintains osmotic balance of cells and tissue fluids.
3. Blood contains 13 clotting factors which are named in roman numerals from I to XIII. For example, factor I is fibrinogen, factor II is prothrombin and factor XIII is fibrin stabilising factor.
4. Blood plasma without any clotting factor is called serum.
5. Blood contains many inorganic micronutrients called minerals which are essential for normal body functions such as calcium, iron, phosphorus, sodium etc.
Hence, statements 2,3,4 are correct and 1,5 are incorrect.
So, the correct answer is '2, 3, 4 correct, 1 and 5 wrong'.

Amino acid functioning as buffer in blood is

  1. Histidine

  2. Glutamine

  3. Glutamic acid

  4. Lysine.


Correct Option: A

Globulins contained in human blood plasma are primarily involved in

  1. Clotting of blood

  2. Osmotic balance of body fluids

  3. Defence mechanism of body

  4. Oxygen transport in blood.


Correct Option: C

Which of these is/are inactive forms
(i) Fibrin (ii) Fibrinogen (iii) Thrombin (iv) Prothrombin (v) Thrombokinase

  1. v only

  2. i and iii only

  3. i and ii only

  4. iii and v only

  5. ii and iv only.


Correct Option: E

Match the column I (constituent of blood plasma) with column II (its function) and select correct option

I II
(p) Globulins (x) Regulation of membrane permeability
(q) Sodium (y) Clotting of blood
(r) Water (z) Defence and liquid transport
(s) Fibrinogen (w) Solvent for carrying substances
  1. p-w, q-z, r-z, s-y

  2. p-z, q-x, r-w, s-y

  3. p-y, q-w, r-y, s-x

  4. p-w, q-y, r-z, s-w.


Correct Option: B

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


Correct Option: D
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'.

About _________ percent of $O _{2}$ is carried in dissolved state through the plasma. Choose the correct options.

  1. $a = 9.8\ ml, b = 6000\ ml$ to $8000\ ml, c = 12\ to \ 16, d = 3$

  2. $a = 5\ ml, b = 500\ ml, c = 12\ to \ 16, d = -3$

  3. $a = 9.8\ ml, b = 5\ ml$ to $8000\ ml, c = 12\ to \ 16, d = 3$

  4. $a = 5\ ml, b = 6000\ ml$ to $8000\ ml, c = 18 times, d = 7$


Correct Option: A

The liquid portion of the blood is called as 

  1. Plasma

  2. Leucocyte

  3. Serum

  4. None of the above


Correct Option: A
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.