23. Plasmids _________.   A. exist independently of the bacterial chromosome   B. are common in bacteria   C. carry genes that are not necessary for survival but may provide advantages   D. all of the

10. _E.coli phage T4 DNA is terminally redundant and ____________________.A.    linearly permutedB.    circularly permutedC.    single-strandedD.    blunt endedE.    none of the above 11.    ___________ allows cells to maintain the chromosome number.A.    MeiosisB.    MitosisC.    Binary fusionD.    BuddingE.    None of the above 12.    ___ is the repair of UV-damaged DNA by a light-dependent enzymatic reaction.A.    PhotoreactivationB.    Sensory deprivationC.    PhotoinductionD.    PhotosynthesisE.    none of the above

2. Replicate this strand of DNA:GCA TAG CAA TGC

The difference between transformation and conjugation in bacteria consists of the fact that:     a.  only transformation involves the presence of a plasmid     b.  only conjugation involves the presence of a plasmid    c.  only conjugation involves the presencce of a sex pilus    d.  both answers b and c are correct     e.  none of the above answers arre correct

Which statement is false regarding plasmids? Circular dsDNAs that reside in bacterial cells Replicate independently from host cell Encode no more than 1-2 genes that benefit the host cell Called episomes when they incorporate into the host cell genome Classified by what type of host cell they infect

36. In the cell depicted in the picture, the ribosome is labeled b. c. d. 37. A gene mutation is none of these b. may orise spontaneously. a change in the nucleotide sequence of DNA. is is all of these. e. moy be caused by environmental agents. c. d. 1P BDACE

2) When parental DNA is replicated, it produces A. lagging strand DNA B. leading strand DNA C. daughter DNA D. all of these

13.    In bacteria, mismatch repair involves:A.    DNA glycosylase/lyaseB.    AP endonucleaseC.    RecA and LexA proteinsD.    MutS, MutL and MutH proteinsE.    UvrABC proteins 14. _______ involves an exchange of DNA between two interacting DNA molecules.A.    TransferenceB.    TranspositionC.    Crossing overD.    InductionE.    None of the above 15.    The bacterial core polymerase has two functions: 5' to 3' polymerase activity and _________________ activity.A.    5' to 3' exonucleaseB.    3' to 5' polymerase C.    3' to 5' exonuclease D.    topoisomeraseE.    none of the above

Defects in the excision  repair process may result in : A. Mutations B. Okazaki fragments C. Excess DNA polymerase activity D. Shortened telomeres

7.     Replication factor C plays which of the following roles in eukaryotic DNA replication?A.    the sliding clampB.    the clamp loaderC.    the DNA ligaseD.    a single-stranded DNA binding proteinE.    a cofactor required for activating the DNA polymerase 8. Phages that program the host cell for continued particle releasing without killing the cell are called ____________ phages.A.    lyticB.    lysogenicC.    temperateD.    chronicE.    none of the above 9. Retroviruses use _______ to make a DNA copy of their RNA genome.A.    restriction enzymesB.    DNA polymerase IC.    RNA polymerase IID.    reverse transferaseE.    reverse transcriptase