10. The lac repressor protein binds to
(A) lactose and DNA.
(B) RNA polymerase.
(C) RNA polymerase and DNA.
(D) beta-galactosidase, permease, and transacetylase.

11. The term "satellite" DNA refers to (A) extrachromosomal DNA fragments that are found close to (orbiting) the full-length chromosomes (B) mitochondrial DNA, which is circular in nature (C) long tandem repeats of simple DNA sequences (D) mobile DNA elements such as transposons and insertion sequences

12. What's a snRNP? (A) a nuclear complex of proteins and catalytic RNA (B) a particle required for recognition of the N-terminal signal sequence at the beginning of proteins destined for the cell membrane (C) an enzymatic complex required for transcription initiation in eukaryotes (D) none of above

13. Which of the following best describes thymine dimers? (A) intrastrand crosslinks induced by UV radiation (B) most commonly produced through oxidative damage to DNA, which is caused by the by-products of mitochondrial respiration (C) recognized by MutS and excised by MutH, when MutH is activated by MutL (D) byproducts of DNA replication, formed when one dTTP molecule is mistakenly linked to another rather than to the 3' end of the growing strand

14. A mutation in the lac operator that prevents it from serving its normal function will result in (A) expression of the operon even in the absence of lactose (B) repression of the operon even in the presence of lactose (C) expression of the operon even in the presence of glucose (D) repression of the operon even in the absence of glucose

15. Topo II is important in DNA replication because... (A) it induces positive supercoils ahead of the replication fork (B) it induces negative supercoils, facilitating unwinding of the DNA helix (C) it separates the two template strands from each other, providing a single-stranded template for DNA polymerase (D) topo II is not important for DNA replication, only topo I is required

16. A circular 11-nm chromatin fiber contains 100 nucleosomes. If this chromatin fiber are depleted of histone proteins and treated with an endonuclease to produce one single-strand break, what would the DNA look like? (A) a relaxed circular DNA duplex containing about 20,000 base pairs (B) a relaxed circular DNA duplex containing about 2,000 base pairs (C) a supercoiled DNA containing about 100 negative supercoils (D) a supercoiled DNA containing about 100 positive supercoils

17. The base composition of nucleic acids isolated from a unknown virus was found to contain 20% A,30% T, 30% G and 20% C. The nucleic acid of this virus is likely: (A) single-stranded RNA (B) double-stranded DNA (C) single-stranded DNA (D) double-stranded RNA

18. Which activity of bacterial DNA polymerase is used for editing (proof-reading) (A) 3' to 5' exonuclease (B) 5' to 3' exonuclease (C) primase (D) polymerization activity

19. A mutation that produces a temperature-sensitive phenotype is generally caused by: (A) base-pair substitution (B) macro-deletion (C) frameshift mutation (D) translocation

20. Which of the following structures is involved in the protection of eukaryotic chromosome from end-to-end fusions: (A) centromere (B) nucleolus (C) telomere (D) introns

115年 - [無官方正解]115 國立清華大學_碩士班入學考試試題_生命科學暨醫學院甲組(生物與醫學科學組)：分子生物學#142697

114年 - [無官方正解]114 國立中正大學_碩士班招生考試試題_生物醫學科學系：分子生物學#138414

114年 - [非官方正解]114 國立清華大學_碩士班入學考試試題_生命科學暨醫學院甲組(生物與醫學科學組)：分子生物學#132699

113年 - [無官方正解]113 國立中正大學_碩士班招生考試試題_生物醫學科學系：分子生物學#136961

113年 - [非官方正解]113 國立成功大學_碩士班招生考試_藥理學研究所 :分子生物學#126004

113年 - [非官方正解]112 國立臺灣大學_碩士班招生考試：分子生物學(B)#118906

112年 - [非官方正解]112 國立臺灣大學_碩士班招生考試：分子生物學(C)#120020

112年 - [非官方正解]112 國立臺灣大學_碩士班招生考試：分子生物學(B)#120007

112年 - [非官方正解]112 國立臺灣大學_碩士班招生考試：分子生物學(D)#118608

112年 - 112 國立臺灣大學_碩士班招生考試：分子生物學(A)#118594