Consider statements about human anatomy: 1. The femur is the longest bone in the body. 2. The stapes is the smallest bone in the body. 3. The hyoid bone is attached to another bone by a joint. Which are correct? MCQ with Answer and Explanation
Consider statements about human anatomy: 1. The femur is the longest bone in the body. 2. The stapes is the smallest bone in the body. 3. The hyoid bone is attached to another bone by a joint. Which are correct?
A. 1 and 2 only
B. 1 and 3 only
C. 1, 2 and 3
D. 2 and 3 only
Answer: Option A
Solution (By JKSSB Mock Tests)
The femur (thigh bone) is the longest, heaviest, and strongest bone in the human skeleton. The stapes (stirrup) is a small bone in the middle ear and is the smallest bone in the human body. The hyoid bone is a U-shaped bone in the neck that supports the tongue; it is unique because it is not articulated (jointed) with any other bone, but is suspended by muscles and ligaments. Thus, statements 1 and 2 are correct.
Explanation:
Whittaker's five-kingdom system places all prokaryotes (bacteria, cyanobacteria, archaea) in Monera. They lack a true nucleus and membrane-bound organelles. Protista has unicellular eukaryotes, Fungi and Plantae are multicellular eukaryotes (except yeast). Monera reproduces asexually mainly by binary fission.
Explanation:
Cloning produces genetically identical copies of an organism or cell. In animals, somatic cell nuclear transfer (like Dolly the sheep) is used. Plant cloning occurs via vegetative propagation or tissue culture. Hybridization combines different genomes; mutation breeding induces mutations; cross breeding involves mating. Cloning has applications in therapeutics, conservation, and agriculture.
Consider statements about human nutrition: 1. Calcium is essential for blood clotting. 2. Iron is a component of hemoglobin. 3. Iodine is required for thyroid hormone synthesis. Which are correct?
Explanation:
Calcium ions (Ca2+) are essential cofactors in the blood coagulation cascade, required for converting prothrombin to thrombin. Iron is the central atom in the heme group of hemoglobin, enabling oxygen transport in red blood cells. Iodine is an indispensable component of the thyroid hormones thyroxine (T4) and triiodothyronine (T3). All three statements are biologically accurate.
No comments yet. Be the first to start the discussion!