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54. In bacteria,

a)protein coding regions are densely packed (one gene/1000 bp)

b)each structural

gene has its own promoter

c)introns are common

d)all of the above

16. In the human genome, at least BLANK % is repetitive DNA





17. Which of the following is true?

a)   A portable DNA sequencer is currently available

b)   A complete bacterial genome has been chemically synthesized assembled and introduced into a new bacterial cell

c)    Next generation sequencing is fast

d)   All of the above are true

18. A bacteriophage strain carrying a point mutation is crossed with a bacteriophage strain carrying a deletion mutation. If no wild type phage are produced, the point mutation

a)was outside the deleted region b)within the deletion

19. Certain RNA molecules have catalytic activity

a)false b)true

20. Scientists have found

a)   Over 1000 different mutations in the same gene that all cause cystic fibrosis

b)   Only one mutation that causes cystic fibrosis

21. In e.coli high glucose levels reduce cyclic AMP (Camp) levels than BLANK transcription of the lactose operon

a)increase b)decrease

22. The start of a wild type mRNA was AUGCCCAAGACC, a mutation resulted in the sequence AUGCCAAGACC this type of change is called a BLANK mutation

a)   Frameshift  b)missense

63. Although a couple is phenotypically normal, they have one child who is affected by a recessive characteristic. Blood samples obtained from all individuals were used to prepare DNA which was further analyzed using a probe which detects the characteristic. From the gel below, determine the phenotype of a second child

                    Female parent       Male parent   Affected child     ? child

                             ---                       ---                      ----

                             ---                      ---                                                    ---

                             ---                      ---                       ----

The genotype of ? child is:

a)   Homozygous recessive

b)   Homozygous dominant

c)    Heterozygous

d)   Cannot be determined

24. Which of the following geneticcaly engineered products are available?

a)   Human growth (HGH)

b)   Tissue plasminogen activator (Tpa)

c)    Human insulin

d)   All of the above 

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