In an enzyme controlled reaction, a substrate is the same as

In an enzyme controlled reaction, a substrate is the same as a reactant.

Reactant is a substance that will be used (there will be reduced) in reaction. Substrate will bind with enzyme and undergo a chemical reaction, so it will be used to make the product. Catalyst is helping reaction but not used, thus it's not a reactant. 

Ifound this on google “concept 13: meiosis ii: telophase ii. a nuclear envelope forms around each set of chromosomes and cytokinesis occurs, producing four daughter cells, each with a haploid set of chromosomes. a nuclear envelope forms around each set of chromosomes.” i hope this you for what your looking for.