Everyday Science · Circulatory System (Human Biology) · page 3 of 8

Blood MCQs with Answers

Includes 11 past paper MCQs (marked).

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Blood MCQs (21–30)

10 MCQs with answers and a short one-liner. Hide answers to test yourself.

Past paper MCQs in this chapter · See all past papers

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21.
Snake bite first affects the ?
Correct Answer: D. Blood circulation
One-liner
Snake bite first affects the blood circulation because snake venom enters the bloodstream and is rapidly transported throughout the body via the circulatory system.
22.
Binding of hemoglobin with oxygen is catalyzed by the enzyme ?
Correct Answer: D. Carbonic anhydrase
One-liner
The binding of hemoglobin with oxygen is catalyzed by the enzyme carbonic anhydrase.
23.
Past Paper MCQ
What type of material is primarily responsible for blood clotting in the human body?
Correct Answer: C. Proteins
One-liner
Blood clotting is primarily carried out by proteins, namely clotting factors like fibrinogen and prothrombin.
24.
Protein present in haemoglobin has _ structure.
Correct Answer: D. Quaternary
One-liner
The protein present in haemoglobin has a quaternary structure.
25.
75% osmotic pressure of blood is maintained by _?
Correct Answer: D. Albumin
One-liner
75% of the osmotic pressure of blood is maintained by Albumin, the most abundant plasma protein.
26.
What is the meaning of Anemic?
Correct Answer: A. Shortage of blood
One-liner
Anemic means a condition of shortage of blood or deficiency of red blood cells/hemoglobin in the body.
27.
Which substance has a pH value closest to neutral?
Correct Answer: B. Blood
One-liner
Blood has a pH value of approximately 7.35–7.45, making it the substance closest to neutral among the given options.
28.
Blood contains approximately how much oxygen per 100 ml when hemoglobin is 98% saturated?
Correct Answer: B. 19.6 ml
One-liner
Blood contains approximately 19.6 ml of oxygen per 100 ml when hemoglobin is 98% saturated.
29.
The oxygen transported through blood plasma is about _?
Correct Answer: C. 3%
One-liner
Only about 3% of oxygen is transported dissolved in blood plasma, while the remaining 97% is carried by hemoglobin in red blood cells.
30.
Which one is essential for the formation of hemoglobin?
Correct Answer: D. Iron
One-liner
Iron is the essential mineral required for the formation of hemoglobin in red blood cells.

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Blood MCQs with Answers

Blood MCQs (21–30)

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