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WorksheetsExpression of Biological Information 2
Total questions: 20
Worksheet time: 7mins
State the function of tRNA
transfer genetic code transcript copied from DNA
transfer genetic code transcribed to ribosome
transfer amino acids to growing polypeptide chain in ribosome
How does template is read during transcription process?
Template is read from 3' end to 5' end
Template is read in both direction
Template is read from 5' end to 3' end
Template is read alternately
Where does transcription occur?
Nucleus
Cytoplasm
Nucleolus
Name the region on mRNA for RNA polymerase to bind during Initiation in transcription process
Operator
Promoter
Terminator
Name the enzyme that catalyze the addition of free RNA nucleotides to the growing mRNA strand
RNA polymerase
DNA polymerase III
DNA polymerase I
Primase
What stage of Transcription shown in above diagram
Initiation
Elongation
Termination
Which of these steps in Elongation stage of Translation process?
Codon recognition
Initiation
Translocation
Termination
Peptide bond formation
Eukaryotic mRNA molecules are occasionally interspersed with non-coding sequences. They are called
Anticodon
Codon
Exons
Introns
Where does RNA splicing occur?
Nucleus
Nucleolus
Cytoplasm
State the function of A site of ribosomes
holds the tRNA carrying the growing polypeptide chain
discharged tRNA leaves the ribosome
holds the tRnA carrying the next amino acid to be added
Name the amino acids for start codon AUG
Leucine
Isoleucine
Methionine
Alanine
Which of these are STOP codon?
UGA
UGG
UAG
UAA
AUG
Name the enzyme that catalysed the attachment of amino acid to tRNA
Aminoacyl-tRNA synthetase
Transacetylase
RNA polymerase
Permease
What happen to the Ribosome when it reach to stop codon?
The two ribosomal subunit dissociate
The two ribosomal subunit autolysis
The two ribosomal subunit disintegrate
The two ribosomal hydrolyzed by release factor
What happen when ribosome reaches a stop codon on mRNA
Bond between the last amino acid and tRNA in P site is hydrolyzes by release factor
Bond between anticodon of tRNA and codon mRNA is hydrolyzes by release factor
Bond between first amino acid and tRNA in A site is hydrolyzes by release factor
Peptide bond between amino acids is hydrolyzes by release factor
If the DNA triplet code were ATG CGT, the tRNA anticodons would be
UAG GCA
UAG CGU
ATG CGT
AUG CGU
State the importance of Translocation step
Brings mRNA,tRNA and rRNA together
Ensure polypeptide from tRNA is removed
Ensure that mRNA is read 5'→3' direction
Each tRNA carries one specific amino acid.How many tRNA do we have?
4
8
16
20
Based on above diagram, name the complex
(a)
How many nucleotide present in a codon?
2
3
4
6
