Name: ___________________________
Date: __________________ Pd: _____
Protein Synthesis Test Review
Put the following steps of protein synthesis in order by numbering 1 through 5.
________ mRNA leaves the nucleus with the DNA code, and goes to the ribosomes
________ribosomes make proteins
________mRNA and tRNA meet in the ribosomes
________DNA temporarily unzips
________mRNA nucleotides match up to DNA
The code on a DNA strand reads:
G C G T A A T G A
6. The mRNA strand would read: ____________________________
7. Use the mRNA to now make tRNA: ____________________________
8. How many codons are represented by the above DNA sequence? _______
9. How many amino acids can be coded for by the above DNA strand? _______
10. What are proteins composed of (monomer unit)? _________________________________
11. What organelle assembles proteins? __________________________________
12. What type of RNA delivers amino acids to the ribosome? _________________
13. What type of RNA acts as a copy of the DNA? ______________
14. How many different types of RNA are there? _______
15. How many different types of amino acids are there? _______
16. What molecule found in the nucleus carries (has) the code for making a protein? _______
17. When the information from DNA is passed to RNA this process is called ________________________.
18. Give the DNA segment for the following strand of mRNA.
A U G G C A ___________________
19. Give the mRNA segment for the following strand of tRNA.
C U U A A G ___________________
20. A scientist fills a test tube with nucleotide chains of GGG GGG and allows proteins to form. When he
looks at the test tube later all he finds is the amino acid glycine. What can he conclude from his
results?
Glycine is (circle your answer)
composed of guanine
or
coded for by GGG.
21. Where does transcription occur? _______________________________________
22. Which nucleic acid is double stranded?
____________________________________________________
23. What nitrogen base is unique to (only found in) DNA? ___________________
24. What nitrogen base is unique to (only found in) RNA? ___________________
25. How many nitrogen bases make a codon? _______
26. Amino acids linked together form what? ___________________________
27. What is the monomer unit for a nucleic acid? Amino Acid or Nucleotide (circle your answer)
(28-30) Label each type of RNA (ribosomal, messenger, transfer)
_______________
_______________
______________
Use the mRNA codon chart to give the amino acid chain for the following strands of DNA.
31. A U G C A C G G G A C A U A A
_____________________________________________
32. A A A C G C U U U G A C U G A
_____________________________________________
(33-37) Label the following diagram with these terms:
C. ribosome
D. protein
A. mRNA,
B. tRNA
E. Nuclear Envelope