Answer:
1 Each cell has different genes activated depending on it's job and what kind of cell it is.
3 If a gene is turned on then it is being expressed.
5 Making a protein from mRNA is called translation.
6 Each trait is coded by a different gene.
7 What protein physically blocks the transcription of genes? Transcription factors.
10 The process of manipulating DNA to introduce genes to other organisms is called genetic engineering.
12 What do you call DNA that is combined from 2 different organisms? Recombinant DNA.
13 If RNA polymerase can't bind to a gene, then transcription can't occur and no protein is made.
14 Using living organisms to produce a product is called biotechnology.
16 After the protein has fallen off the operon, the RNA polymerase can then transcribe the DNA into mRNA.
17 The process of making mRNA from DNA is called transcription.
18 The fact different genes can be expressed at different times results in cell specialization.
19 The lac operon only turns on if there is lactose present, helping the cell to save energy.
20 Cell differentiation turns on and off certain genes.