Q. Which of the following statements with reference to ‘blood’ is/are correct ?
1. Blood is composed of plasma and different types of cells.
2. The presence of haemoglobin makes blood appear red.
Select the correct answer from the code given below :
a) Only 2
b) Neither 1 nor 2
c) Both 1 and 2
d) Only 1
Correct Answer: c) Both 1 and 2
Question from UPPSC Prelims 2025
Explanation:
Statement 1 is correct: Blood consists of a fluid matrix (plasma) and formed elements (cells), namely red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes).
Statement 2 is correct: The red color of blood is due to hemoglobin in red blood cells; the heme group with iron gives a red hue (bright red when oxygenated, darker red when deoxygenated).
Therefore, both statements are correct.
