Question

Which one holds corona radiata ?
A. Mucopolysaccharide
B. Oligosaccharide
C. Lipopolysaccharide
D. Lipoprotein

Answer 1

Hint: The corona radiata is the outer layer of follicular (granular) cells that form around the developing egg in the ovary and stay together during ovulation. The substance which holds corona radiata is generally known as glycosaminoglycans.

Complete answer:
Let’s first of all understand about corona radiata.
The cells of the secondary oocyte(ovum) cover a new membrane called zona Pellucida. This thick layer of zona Pellucida is composed of glycoproteins and synthesised by oocyte. Then, the granulosa layer of cells Which is present in the vicinity of ovum and zona Pellucida layer become elongated to form a new layer of cells known as corona radiata.
Corona radiata consists of two to three layers of cells. They originate from follicular cells and attach to the outer surface of the striatum region when the egg is released from the follicle. The cells are arranged radially around the area, and the cells in the innermost layer are columns. Cells in the radius of the coronary arteries disappear immediately. In some animals, it is secreted or replaced by a sticky protein coat that helps protect and nourish the eggs.
The Mucopolysaccharide, secreted by the zona Pellucida, creates a layer of granular cells on the outside (corona radiata).Mucopolysaccharides are actually long-chain molecules of sugar found in the body, It is also present in mucus and body fluids present around the joints.

Hence the correct option is (A).

Note:
Ovum is the only animal cell visible to the naked eye, regardless of size, and is the same size as the dot at the end of this sentence. Most eggs are padded and the inner shell protects important information.
In humans, the egg is covered with a thin membrane vitelline, which is additionally covered by another primary membrane called the zona Pellucida. Between these two membranes, there is a narrow space known as retail space.
Mucopolysaccharides are commonly referred to as glycosaminoglycans.