WRITING PREPOSITIONAL PHRASES

Front

One form ... diabetes mellitus is caused by the inability of the pancreas to produce insulin.

Back

A.

Front

Before ... from GM bacteria became available

Back

Insulin

Front

People with ... diabetes were treated with insulin from pig or cattle pancreases.

Back

C.

Front

In the 1970s, biotechnology companies began to work on...

Back

C

Front

the idea of ... the gene for human insulin into a bacterium

Back

Inserting

Front

This form D) ... human insulin became available in 1983.

Back

D

Front

Problems in 7) ... the gene coding for human insulin

Back

Locating and isolating

Front

Instead of ... the gene from the DNA in the relevant chromosome

Back

Cutting out

Front

These cells contain large quantities of mRNA for insulin; they are its only source in the body.

Back

C

Front

The mRNA was incubated ... with reverse transcriptase.

Back

D