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Homework question
By using the table answers the following questions: ( / 5 marks)
1- Given the following sequence of mRNA, what series of amino acids are coded for?
mRNA: CUC AAG UGC UUC
a- Ser - Tyr - Arg – Gly
b- Val - Asp - Pro – His
c- Leu - Lys - Cys – Phe
d- Pro - Glu - Leu - Val
2. For the same mRNA sequence as in question 1, the anticodons for the codons in the mRNA are
a- GAG - UUC - ACG – AAG
b- GAG - TTC - ACG – AAG
c- CUC - GAA - CGU - CUU
d- CUU - CGU - GAA - CUC
3. Given the following sequence of amino acids, use the genetic code table to determine the DNA sequence that codes for the amino acids.
amino acid sequence: tyrosine - proline - aspartic acid - cysteine
a- AUG GGU CUA ACG
b- ATG GGT CTA ACG
c- GCA AAC TCG GTA
d- ATA GGG CTA ACA
4. codons : mRNA :
a- anticodons : tRNA
b- triplets : DNA
c- rRNA : ribosomes
d- all of the above
5. The codon AUG, which codes for the amino acid methionine, also serves as
a- a lac operon
b- a start codon
c- a stop codon
d- a promoter
6. The codons UAA, UAG, and UGA all code for
a- arginine
b- threonine
c- phenylalanine
d- stop codons
7. With the exception of tryptophan, each amino acid is coded for by more than one codon. This is called
a- translation
b- reversal
c- redundancy
d- sequentialism
8. The fact that the genetic code is almost universal in living organisms is considered to be evidence that all organisms
a- are evolutionarily related
b- are genetically identical
c- have the same sequence of anticodons
d- none of the above
9. Anticodons are found on
a- rRNA
b- mRNA
c- DNA
d- tRNA
10. The entire genetic code consists of ____ amino acids and ____ codons.
a- 20, 20
b- 20, 64
c- 30, 60
d- 30, 72
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