(a) Replication begins at a single origin of replication. (b) Replication is bidirectional from the origins. (c) Replication occurs at about million base pairs per minute. (d) There are numerous different bacterial chromosomes, with replication ocurring in each at the same time.
. The first codon to be deciphered was which codes for . (a) AAA, proline (b) GGG, alanine (c) UUU, Phenylalanine (d)TTT, arginine . Meselson and Stahl’s experiment proved (a)Transduction (b) Transformation (c) DNA is the genetic material (d) Semi-conservative nature of DNA replication .
Ribosomes are composed of two subunits; the smaller subunit of a ribosome has a binding site for and the larger subunit has two binding sites for two . (mRNA, tRNA) . An operon is a: (a) Protein that suppresses gene expression (b) Protein that accelerates gene expression (c) Cluster of structural genes with related function (d) Gene that switched other genes on or off . When lactose is present in the culture medium: (a) Transcription of lac y, lac z, lac a genes occurs.
(b) Repressor is unable to bind to the operator. (c) Repressor is able to bind to the operator. (d) Both (a) and (b) are correct. density distribution of DNA would you expect in this experiment?
(a) One high and one low density band. (b) One intermediate density band. (c) One high and one intermediate density band. (d) One low and one intermediate density band.
. What is the basis for the difference in the synthesis of the leading and lagging strand of DNA molecules? (a) Origin of replication occurs only at the ' end of the molecules. (b) DNA ligase works only in the ' → ' direction.
(c) DNA polymerase can join new nucleotides only to the ' end of the growing stand. (d) Helicases and single-strand binding proteins that work at the ' end. . Which of the following is the correct sequence of event with reference to the central dogma?
(a) Transcription, Translation, Replication (b) Transcription, Replication, Translation (c) Duplication, Translation, Transcription (d) Replication, Transcription, Translation . Which of the following statements about