9. Which of the following factor(s) mediates the binding of the Shine-Dalgarno sequence with the complementary sequence of the 16S rRNA?
(A) IF-2
(B) IF-3
(C) EF-Tu
(D) EF-G
(E) RRF

5. Rolling circle replication ________. (A) begins when the origin of replication is pulled apart to generate a replication bubble (B) occurs at the origin of vegetative replication (C) begins when the origin of replication is nicked and one strand is unrolled (D) occurs when a plasmid replicates in step with host cell division (E) occurs bidirectionally that can rapidly synthesize multiple copies

複選題6. Regarding molecular cloning using restriction enzyme and ligase. (A) Blunt end is clean and thus easier to be ligated. (B) Ligase also mediates joining of sticky ends by catalyzing the formation of hydrogen bonds. (C) Two sticky ends with complementary overhangs can be perfectly ligated but the restriction enzyme recognition site is not necessarily restored. (D) Restriction enzyme more efficiently cuts at the ends of DNA fragments. (E) Phosphatase treatment of both digested vector and digested insert reduces self-ligation so that correct ligation is enhanced.

7. The size of a gene in the genome is 3kb. What is the expected size of the polypeptide product encoded from the 3kb sequence? It appears as a single 60kD band on a SDS-PAGE gel. What could be the explanation for the difference? (A) 110kD； presence of introns (B) 110kD； protein degradation (C) 55kD； post-translational modifications (D) 55kD； amino acid composition bias (E) 30kD； dimer formation

複選題8. Which of the following factor(s) promote dissociation of 70S ribosome to 50S and 30S? (A) IF-2 (B) IF-3 (C) EF-Tu (D) EF-G (E) RRF

10. Which of the following descriptions is NOT correct for comparison of protein translation between eukaryotes and bacteria? (A) Bacterial translation begins with methionine (B) Bacterial translation requires Shine-Dalgarno sequence to show ribosomes where to start (C) Eukaryotic mRNA has caps at 5'end (D) Eukaryotic initiating tRNA is not same as tRNA for interior (E) Eukaryotic translation requires Kozak sequence to show ribosomes where to start

複選題11. Which of the following factor(s) can bind Pab1p, a poly[A]-binding protein? (A) eIF1 (B) eIF1A (C) eIF4A (D) eIF4E (E) eIF4G

12. Which of the following factor(s) has an RNA helicase activity in translation initiation complex? (A) eIF1 (B) eIF1A (C) eIF4A (D) eIF4E (E) eIF4G

複選題13. Which of the following factor(s) are involved in dissociating improper complexes between 40S subunits and mRNA? (A) eIF1 (B) eIF1A (C) eIF4A (D) eIF4E (E) eIF4G

14. Which of the following descriptions is NOT correct for the peptidyl transferase in ribosome? (A) The peptidyl transferase resides on the 50S ribosomal particle (B) The peptidyl transferase activity is GTP-dependent (C) Minimum components necessary for its activity are 23S rRNA and proteins L2 and L3 (D) 23S rRNA is at the catalytic center of peptidyl transferase (E) puromycin can be its substrate

複選題15. Which of the following description about histone is (are) correct? (A) The molecular mass of Histone H4 is bigger than the other types of histones. (B) Histones H2A/H2B and H3/H4 dimerize through the non-covalent interaction of a highly conserved structural motif found in each core histone. (C) The histone H3 is extreme highly conserved from pea to cow, which differs by only two residues. (D) Histones H1 and H5 bind as monomers to nucleosomes and internucleosomal linker DNA to facilitate higher-order DNA compaction. (E) The heterogeneity of histone proteins is due to alternative splicing.