Biology MCQs
Practice free Biology multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 1146 questions — no login required.
Question 109hard
The smallest blood vessels which are one-cell thick, are called ________
Question 110easy
Name the blood cells in which nucleus is absent.
Question 111easy
Blood group which have no antibodies
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Question 112easy
The sound lub-dub lub-dub is produced by
Question 113medium
Blood is red in colour due to the presence of ________
Question 114hard
Life of red blood cells in the body is
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Question 115easy
The upper chambers of the heart are the
Question 116easy
Purification of blood takes place in
Question 117easy
Fully mature human RBCs has