A) ligase
B) estrogenase
C) androgenase
D) hyaluronidase
Correct Answer: D
Solution :
The lytic enzyme present in semen is hyaluronidase, which facilitates the entry of spermatozoa. This enzyme dissolves corona radiata, zona pellucida and vitelline membrane, enabling the sperm to penetrate these covering. It is also known as spermlysins they occur in sperms acrosome. Ligase is a class of enzymes that catalyse the formation of covalent bonds using the energy released by the cleavage of ATP. These are important in the synthesis and repair of many biological molecules, including DNA and are used in genetic engineering to insert foreign DNA into cloning vectors. Estrogens are steroid hormones secreted by growing ovarian follicle under in structures from anterior pituitary through FSH. They include estradial, estriol and esterne. Estradiol is principal estrogen.
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