Molecular Biology Quiz on Genetic Code

1. The first codon discovered by Nirenberg Mathaei was
GGG
CCC
UUU
AAA
2. The mRNA codon GUC will be recognized by the anticodon of tRNA
CAG
GUC
GAC
CTG
3. The anticodon loop of at RNA typically consists of
3 codons
6 codons
7 codons
5 codons
4. The terminator codons are
UAA, UAG, UGA
UUU, UUC, UUG
UUA, UGG, UGA
UGC, UGG, UAG
5. Khorana first deciphered the triplet codon of
Serine and isoleucine
Cysteine and valine
Tyrosine and tryptohan
Phenylalanine and methionine
6. The genetic codes for ochre, amber and opal are-----,---- and---- respectivelyl
UGA, UAG, UAA
UAG, UAA, UGA
UAG, UGA, UAA
UAA, UAG, UGA
7. How many triplet codons can be made from four nucleotides A, U, G and C containing no uracils?s
27
64
37
6
8. Glycine is coded by
GGG
CCC
AAA
UAA
9. Which one of the following is not an mRNA codon
UUG
UCU
TAG
UUU
10. An important feature of the genetic code which allows the expression of a protein in any host is its
Degeneracy
Universality
Redundancy
Triplet nature
Score =
Correct answers: