quiz online uji nyali 2 biologi dasar II
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QUIZ ONLINE UJI NYALI MENGHADAPI KUIS MINGGUAN 2 BIOLOGI DASAR II: Pengaturan Ekspresi gen & rekayasa gen serta proyek human genome
- 1.The flow of genetic material in microbial cells usually proceeds from
- A.
Proteins through RNA to DNA
- B.
RNA through DNA to proteins
- C.
DNA through RNA to proteins
- 2.The final step in gene expression is protein synthesis, or
- A.
- 3.Another name for the three stop codons which aid in termination of translation is
- A.
Nonsense codons
- B.
Missense codons
- C.
Pause codons
- 4.Another name for the RNA polymerase recognition/binding site upstream of a gene is the
- A.
Promoter
- B.
Terminator
- C.
Facilitator
- 5.Mutations that arise without exposure to external agents are called
- A.
Induced mutations
- B.
Analogous mutations
- C.
Spontaneous mutations
- 6.A mutagen is
- A.
A chemical or physical agent that induces mutations
- B.
An enzyme that repairs mutations
- C.
A molecule which stabilizes DNA thus prevents mutations from occurring
- 7.A mutation that affects only a single nucleotide is called
- A.
A regional mutation
- B.
A site mutation
- C.
A point mutation
- 8.Which form of RNA acts as a blueprint for polypeptide biosynthesis by the ribosome?
- A.
MRNA
- B.
TRNA
- C.
RRNA
- 9.RNA is synthesized under the direction of DNA by this enzyme
- A.
DNA polymerase
- B.
DNA ligase
- C.
RNA polymerase
- 10.Which regions of interrupted genes code for RNA that will be present in the final RNA product?
- A.
Introns
- B.
Exons
- C.
Promoter
- 11.Most procaryotic proteins begin with this modified amino acid
- A.
N-formylleucine
- B.
N-formylmethionine
- C.
N-formylserine
- 12.The most common initiator codon is
- A.
GUA
- B.
UAA
- C.
AUG
- 13.Which part of translation involves the addition of amino acids to an existing polypeptide chain?
- A.
Initiation
- B.
Elongation
- C.
Termination
- 14.What molecule catalyzes the transpeptidation reaction?
- A.
Peptidyl transferase
- B.
RNA polymerase
- C.
DNA ligase
- 15.Aminoacyl-tRNA binds to which site of the ribosome during elongation?
- A.
P site
- B.
A site
- C.
E site
- 16.Enzymes that recognize and cleave specific 4 to 8 base pair sequences
- A.
DNA ligase
- B.
Helicases
- C.
Restriction endonucleases
- 17.Vectors are:
- A.
Molecules that degrade nucleic acids
- B.
Molecules that are able to covalently bond to and carry foreign DNA into cells
- C.
Molecules that protect host cells from invasion by foreign DNA
- 18.The enzyme used to covalently bond foreign DNA to a vector plasmid
- A.
DNA polymerase
- B.
Restriction endonuclease
- C.
DNA ligase
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