Plasmids are used as vectors in plant and bacterial genetic engineering. However, there is a major difference in the fate of genes introduced into bacteria on most bacterial plasmids and into plants on tumor-inducing (Ti) plasmids. What is this difference
A) In bacteria, genes are stably expressed; in plants, gene expression is always lost quickly.
B) Gene expression tends to decrease rapidly and unpredictably in bacteria; gene expression is much more stable in plants.
C) Bacterial plasmids are circular DNAs; Ti plasmid DNA is linear.
D) Bacterial plasmids and the genes they carry usually are not integrated into the chromosome; Ti plasmids and the genes they carry are integrated into the chromosome.
E) Bacterial plasmids typically do not modify the growth of the host cells; Ti plasmids modified for genetic engineering always produce plant galls.
Answer: D
You might also like to view...
Why was Haemophilus influenzae chosen by Craig Venter to test his whole-genome shotgun sequencing method?
What will be an ideal response?
The polarities of complementary nucleic acid strands run in opposite directions: 5?-to-3? and 3?-to-5?. The 5? designation refers to the placement of what chemical group on the 5? carbon of the deoxyribose sugar?
What will be an ideal response?
A transposon may carry genes for proteins that enable their transposition as well as genes for other functions such as drug resistance
Indicate whether the statement is true or false
The whole point of mitosis is to
A. be sure that DNA is replicated. B. reproduce the parent cell into genetically identical daughter cells. C. reproduce the parent cell into similar but not identical daughter cells. D. produce sex cells (gametes).