Which enzyme links nucleotides into a new stand of DNA?

a. DNA ligase
b. DNA mutase
c. DNA polymerase
d. DNA primer
e. DNA replicase


ANSWER: c

Biology & Microbiology

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Ammonia is likely to be the primary nitrogenous waste in living conditions that include _____

A) lots of fresh water flowing across the gills of a fish B) lots of seawater, such as a bird living in a marine environment C) lots of seawater, such as a marine mammal (for example, a polar bear) D) a terrestrial environment, such as that supporting crickets E) a moist system of burrows, such as those of naked mole rats

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Virtually ALL cases of tetanus occur in individuals who have failed to receive tetanus toxoid booster immunizations

Indicate whether the statement is true or false.

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Which of these is generally considered a benefit of synthetic hormones?

A) effects on kidney and liver B) cardiovascular effects C) increased hostility D) mimicking estrogen

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Which of the following lists correctly traces the path of a sound vibration as it moves through the ear?

A. auditory canal-tympanic membrane-malleus-incus-stapes-oval window-cochlea-cochlear nerve B. auditory canal-tympanic membrane-oval window-cochlea-malleus-incus-stapes-cochlear nerve C. auditory canal-malleus-incus-stapes-tympanic membrane-oval window-cochlea-cochlear nerve D. auditory canal-tympanic membrane-malleus-incus-stapes-cochlea-oval window-cochlear nerve E. auditory canal-malleus-incus-stapes-oval window-tympanic membrane-cochlea-cochlear nerve

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