GS Biology Questions and Answers
Practice ModeShowing 10 of 357 questions
Q241
A bone left in dilute HCl for about three days will
Answer: Option B
Explanation: Acid removes mineral salts making bone flexible but not dissolved completely.
Q242
Haversian system is typically found in bones of
Answer: Option D
Explanation: Mammalian bones have Haversian systems for nutrient supply and strength.
Q243
The bone of a mammal contains Haversian canals, which are connected by transverse canals known as
Answer: Option C
Explanation: Volkmann’s canals connect Haversian canals horizontally.
Q244
Blood is
Answer: Option B
Explanation: Blood normally has a slightly alkaline pH around 7.4.
Q245
Mammalian erythrocytes are
Answer: Option D
Explanation: Mammalian red blood cells are circular, biconcave, and lack nuclei for efficient oxygen transport.
Q246
Life span of RBC is
Answer: Option C
Explanation: The average lifespan of red blood cells is approximately 120 days.
Q247
Which one of the following blood pigments contains copper?
Answer: Option B
Explanation: Haemocyanin contains copper and is found in some invertebrates.
Q248
Which of the following tissues in a human being uses the greatest amount of energy?
Answer: Option B
Explanation: Muscular tissue requires the most energy due to its active contractile function.
Q249
Striped muscle fiber has
Answer: Option A
Explanation: Striated muscle fibers are multinucleated cells.
Q250
When we lift hand
Answer: Option B
Explanation: The biceps contracts to lift the hand while the triceps relaxes.