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5. Urokinase and chymotrypsin ( a digestive enzymes) have onedomain in common with each other. This suggests that

a. they eveolve through exon shuffling

b. they are part of a gene family

c. they perform similar functions

9. which of the following point mutations would have little orno effect on cellular function?

a. mutation from AUA to AUG

b. mutation in regulatory region

c. mutation from CUC to AUU

d. mutation from UUA to UUG

e. mutation in exon

f. mutation in introns

10. scientists have estimated mutation rates by studyingmutatant E.coli that are His-. Which of the following is (are) NOTtrue about the experiment involving His- E. coli?

a. His- mutants requires histidine in the media

b.His- mutants can not tolerate histidine

c. His- mutants spontaneously revert back to His+

d. His- mutants can not digest histidine

11. The National Toxicology Program report in 2016 that cellphone radiation increased brain tumor growth in male rats.Radiation can cause damage and mutations to DNA. Suppose you wishedto study this further. You mate these rats and find that theoffsprings have normal incidence of tumors. You would conclude thatthe tumors were most likely due to.

a. changes to somatic cells

b. changes in germ cells

c. changes to gonadal cells

If on the other hand the offspring also had increase tumorgrowth then you would conclude that the

a. tumor cells were passed down to offsprings

b. changes occur in stem cells

c. changes occur in germ cells

cell phones emit................ raditation when talking than onstandby.

a. more

b. less

That would suggest that using a hands-free headset may bebeneficial in preventing brain tumors. Ironically if the phone iskept in the pocket during a call using a headset then the geneticchanges would be

a. prevented

b. more likely to pass to the next generation

c. less severe