For which form of reproduction is a mate required
a. asexual reproduction
b. sexual reproduction
c. mitosis
d. binary fission

The correct answer is B) Sexual Reproduction. This is the only answer where a mate is required and where there is gamete fusion involved - asexual reproduction is where any children come from a single organism alone, mitosis is a process in which one cell splits into two, and binary fission is just another form of asexual reproduction.

Pro insulin undergoes extensive posttranslational modification along the production pathway .