Download Name: Class:_____ Date:______ Lesson Assessment: Genetic

Name:__________________________ Class:_____ Date:__________
Lesson Assessment: Genetic Code and Living Organisms
1. What is the name for the type of helper molecules that match each mRNA codon with complementary sequences
of their own, and deliver the corresponding amino acid?
a. ribosome
b. lipid
c. tRNA
d. nucleic acid
2. If you splice a gene from one species of bacterium into the DNA of another species of bacterium, the new
bacterium would likely translate the gene into ___________.
a. the same sequence of amino acids
b. nothing at all
c. a different sequence of amino acids
d. mRNA
3. The base sequence of a gene in DNA is carried into the cytoplasm by a molecule of complementary
___________.
a. tRNA
b. mRNA
c. protein
d. amino acid
4. The ___________ ___________ refers to the system in which a codon of a specific sequence corresponds to a
certain amino acid.
a. central dogma
b. DNA complementarity
c. genetic code
d. mRNA mission
5. The term ___________ ___________ refers to mRNA sequences such as UAA, which tell a ribosome to end
translation.
a. endoplasmic reticulum
b. stop codon
c. start codon
d. final set
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Name:__________________________ Class:_____ Date:__________
Lesson Assessment: Genetic Code and Living Organisms
6. The genetic code used by the vast majority of organisms is ___________.
a. identical
b. similar
c. different
d. complementary
7. All proteins are composed of ___________ ___________.
a. nucleic acids
b. membrane lipids
c. amino acids
d. citric acid
8. A codon comprises ___________ mRNA bases.
a. 5
b. 3
c. 7
d. 2
9. Almost all organisms use ___________ amino acids for building proteins.
a. 17
b. 4
c. 46
d. 20
10. When a species translates a codon differently from the universal genetic code, those differences usually translate
to ___________ ___________.
a. stop codons
b. reverse codons
c. double codons
d. ancient codons
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ANSWER KEY
1.c 2.a 3.b 4.c 5.b 6.a 7.c 8.b 9.d 10.a
ANSWER KEY - Page 1