26. Plant transformation can be obtained by

A. combining plant and animal cells in culture
B. shooting DNA into plant cells with a gun
C. using the E. coli bacterium to infect plant roots
D. infecting plants with a tobacco mosaic virus

27. An expression vector

A. always contains an origin of replication
B. usually contains a gene that confers antibiotic resistance to the bacterial host
C. always contains DNA segments for the regulation of mRNA production
D. all of the above

28. The unpaired nucleotides produced by the action of restriction enzymes are referred to have

A. sticky ends
B. single strands
C. restriction fragments
D. ligases

29. Which of the following is not true of small inbreeding populations?

A. They tend to loose genetic diversity
B. There is an increased incidence of recessive diseases
C. Alleles may become fixed
D. Mutation is increased

30. Which of these genes codes for a protein that plays a role in growth?

A. DCP1
B. SCLC6A4
C. KRTHA1
D. GH1