Question

Antibodies in our body are complex-
A. Lipoproteins
B. Steroid
C. Prostaglandins
D. Glycoproteins

Answer 1

Hint: These are molecules that encompass protein and carbohydrate chains that are implicated in many physiological tasks involving immunity. Many viruses have this complex structure that helps them enter bodily cells, but can also serve to be vital therapeutic or preventive targets.

Complete answer:.
Lipoproteins are the micellar compound of protein and lipids.
Steroids are a cluster of lipids derived from a saturated compound cyclopentane perhydro phenanthrene, which has a nucleus of four rings.
A prostaglandin is a group of organic compounds derived from crucial fatty acids and causing a range of physiological effects in animals.
Antibodies are the proteins (glycoproteins) called immunoglobulins. These are produced by the lymphocytes in retort to the entry of a foreign substance or antigen into the body Antibodies are of five kinds, e.g. lgG, IgM, IgA, IgD, IgE. Glycosylation happens on a wide range of proteins post-translationally with mainly RER synthesized proteins undergoing glycosylation.

Hence, Option (D) is the correct answer.

Additional Information:
Numerous viruses have surface glycoproteins called spike domains; S (including SARS-CoV-2; the virus causing COVID-19. -discussed below) which allow viruses to bind to their target receptors and enter cells.
Some viruses like HIV, however, have profoundly glycosylated S-domains with a profusion of glycans that hamper antibody binding and recognition, making viruses such as HIV more elusive and difficult to fully treat.

Note: Certain hormones are glycoproteins including follicle-stimulating hormone (FSH) – a gonadotropin hormone that has numerous functions in enlargement, growth, puberty, and reproduction. Others include erythropoietin – a cytokine oozed by the kidneys that arouse red blood cell production in bone marrow at elevated levels in response to hypoxia (low levels normally).