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NAME: ________________________________________________ PERIOD: ________
UNIT 4 PART 1 WORKSHEET 3
1. Three adjacent nucleotide bases are called a ___________________________. These determine
which amino acid is put in a polypeptide.
2. What organelle makes proteins? _______________________________________________________.
3. Genes in the nucleus are transcribed into ____________________________. It has one different base
than DNA, _________________________ instead of __________________________.
4. Match the following:
______ mRNA
A. join together to make ribosomes
______ tRNA
B. carries the genetic info outside the nucleus
______ rRNA
C. carries amino acids to the ribosome
5. What part of a tRNA matches to the codon? ____________________________________________.
6. All of your body cells have the same genes, but each cell only uses some of them. This is called
_____________________________________________________.
7. Because of expression different cell types form. This is called _______________________________.
8. _________________________________________________________ can affect gene expression.