Tag: circulatory system - blood

Questions Related to circulatory system - blood

Choose the right sequential phenomena among the following during the delivery of $O _2$ from blood tissue.
P : Absorption of $CO _2$ by the blood.
Q : Reaction of absorbed $CO _2$ with $H _2O$ to form $H _2CO _3$ within RBC and its conversion into $H^+$ and $HCO^{-} _{3}$ ions in the presence of carbonic anhydrase enzyme.
R : Reaction of absorbed $CO _2$ with $H _2O$ in plasma to form $H _2CO _3$ and its conversion into $H^+$ and $HCO^{-} _{3}$ ions in the presence of carbonic anhydrase enzyme.
S : Combination of $H^+$ with heme portion of $HbO _2$ to release $O _2$.
T : Combination of $HCO^{-} _{3}$ with heme portion $HbO _2$ to form reduced hemoglobin and release of $O _2$.

  1. P, Q, T

  2. P, R, S

  3. P, Q, S

  4. P, R, T


Correct Option: C

Choose the correct answer from the alternatives given.
What is name of the iron-containing protein that gives red blood vessels their colour?

  1. Haemoglobin

  2. Hemocyanin

  3. Pyrite

  4. Lymphocytes


Correct Option: A
Explanation:

The presence of haemoglobin, the red pigment in the red blood cells (RBCs) makes blood appear red in colour. The haemoglobin carries oxygen and transports it to all the parts of the body.

So, the correct option is 'Haemoglobin'.

Correct statement regarding Mitochondria and Chloroplast
A. ATP synthesis is seen in both
B. Outer membrane has more surface in both
C. Circular naked DNA, RNA and 70 ribosomes are seen in both
D. Oxidative phosphorylation occurs in both

  1. A and B

  2. B and C

  3. A and C

  4. A and D


Correct Option: C
Explanation:

Chloroplasts are very similar to mitochondria but are found only in the cells of plants and some algae.ATP synthesis is present in both Mitochondria and Chloroplast and the outer membrane has not more surface in both.

So, the correct option is 'A and C'.

Which of the following chairs of haemoglobin is affected in thalassaemia?

  1. Only $\beta$ chain

  2. Only $\alpha$ chain

  3. Both $\alpha$ and $\beta$ chain

  4. $\gamma$ chain


Correct Option: C

The lymph differs from the blood in having

  1. More RBC less WBC

  2. Less RBC more WBC

  3. No RBC less WBC

  4. No RBC more WBC.


Correct Option: C
Explanation:

WBC count of lymph is 500 $mm^3$. Therefore answer should be actually (C). The genetic material is absent.

Choose the correct answer from the alternatives given.
Which of the following are components of blood?

  1. Plasma

  2. Blood cells and platelets

  3. Gases and other dissolved substances

  4. All of the above


Correct Option: D
Explanation:
The composition of blood is :
1. Blood plasma- 54.3% It contains proteins, amino acids, nitrogenous wastes, nutrients, gases, electrolytes.
2. Red Blood Cells-45%
3. White Blood Cells- 0.7 %
4. Platelets
So, the correct option is 'All of the above'.