There are many different types of APIs for operating systems, applications or websites. Windows, for example, has many API sets that are used by system hardware and applications â when you copy and paste text from one application to another, it is the API that allows that to work.
Function of the Nucleolus. Ribosomes are made of two subunits, a large and a small. Each subunit is manufactured separately in the nucleolus. The proteins needed to make them enter the nucleus through pores in the nuclear membrane. The rRNA is made in the nucleolus itself.ibosomes are made of two subunits, a large and a small. Each subunit is manufactured separately in the nucleolus. The proteins needed to make them enter the nucleus through pores in the nuclear membrane.
1 The nucleus contains the cell's DNA and directs the synthesis of ribosomes and proteins. 2  Found within the nucleoplasm, the nucleolus is a condensed region of chromatin where ribosome synthesis occurs.  Chromatin consists of DNA wrapped around histone proteins and is stored within the nucleoplasm.