WorksheetsEXPRESSION OF BIOLOGICAL INFORMATION
Total questions: 15
Worksheet time: 8mins
The DNA molecule consists of monomers known as
nucleotide
nucleoside
pyrimidine
purine
A new DNA strand only elongated in the 5’ to 3’ direction because
DNA polymerase adds nucleotides at the 5’ end
Replication must progress toward the replication fork
Okazaki fragments prevent elongation in the 3’ to 5’ direction
DNA polymerase adds nucleotides only to the free 3’ end
DNA ligase are enzymes that
Unwind the double helix of DNA during replication
Link the nucleotides of the new DNA strand along the template of the old strand
Rejoin the two DNA strands (one new and one old) after replication
Annealing the Okazaki fragments
Function of primase in the figure as
Unwinding the DNA double strand to allow DNA polymerase to function
Forming replication fork
Making short strands of RNA at the site where replication begins
Hydrolyzing ATP to facilitate DNA unwinding
Transcription occur in
Cytoplasm
Ribosome
Nucleus
All of the followings are the function of promoter except for
Act as binding site for RNA polymerase
Act as stop signal for transcription
To determine which strand act as template
What is the product of transcription and where does it go after the process?
rRNA, ribosome
rRNA, cytoplasm
mRNA, ribosome
mRNA, cytoplasm
What is the name of enzyme for amino acid activation?
aminoacyl tRNA synthase
aminoacyl tRNA synthetase
aminoacyl rRNA synthase
aminoacyl rRNA synthetase
What are the three steps in elongation stage of translation (in sequence order)?
Codon recognition, translocation, peptide bond formation
Codon recognition, peptide bond formation, translocation
Peptide bond formation, translocation, codon recognition
Peptide bond formation, codon recognition, translocation
What happen when it reach stop codon during termination stage?
Aminoacyl tRNA bind to A site
Aminoacyl tRNA bind to P site
Release factor bind to A site
Release factor bind to P site
In lac operon, B-galactosidase is encoded by
lacG
lacA
lacZ
lacB
In the presence lactose, the repressor protein will bind with
operator region
promoter region
lactose
allolactose
Function of operator in lac operon
Act as binding site for RNA polymerase
Act as binding site for lactose
Act as binding site for repressor protein
lacA synthesize enzyme
ß- galactosidase
Transacetylase
Permease
What is the inducer in lac operon
Glucose
Maltose
Sucrose
Allolactose
