Question

Hyaluronic acid is present in
A. Human sperm
B. Connective tissues
C. Ovum
D. Both B and C

Answer 1

Hint: Hyaluronic acid (HA) is a naturally occurring glycosaminoglycan found throughout the body’s connective tissue and glycosaminoglycans are simply long unbranched carbohydrates, or sugars, called polysaccharides.

Complete answer:
Hyaluronic acid is an anionic, nonsulfated glycosaminoglycan distributed widely throughout the connective, epithelial, and neural tissues. It is found in the ground substance of synovial fluid of joints of body and vitreous humor of eyes. It is present as a ground substance in connective tissues and also forms a gel around the ovum.
Connective tissue is found everywhere in the human body. Its major functions are binding, support, protection, and insulation. In all connective tissue, there are three main structural elements. They are a ground substance that is hyaluronic acid, stretchy fibers that are collagen and elastin and a fundamental cell type. Hyaluronic acid serves as a lubricant and shock absorbent in the joints. The enzyme hyaluronidase present in semen degrades the gel (hyaluronic acid) around the ovum which allows effective penetration of sperm into the ovum and fertilisation occurs.
A particular type of fibroblasts, embedded in dense fascial tissues, has been found as specialized cells for the biosynthesis of the hyaluronan-rich matrix.

Thus the correct answer is D. Both B and C

Note:
As a major component of the extracellular matrix, hyaluronic acid has a key role in tissue regeneration, inflammatory response, and angiogenesis, which are phases of skin wound repair. Hyaluronic acid is present in both connective tissue and ovum.