The nematocysts of cnidarians are produced within the:
a. cnidocytes.
b. cnidocils.
c. statocysts.
d. mouths.
e. pneumatocysts.
A
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What aspect of the DNA molecule is responsible for heritable information?
a. the specific placement of the sugars ribose and deoxyribose b. variations in the patterns of cross-pairings between the bases on opposite sides of the molecule c. variations in the number of adjacent phosphates within the backbone of the molecule d. the sequence of bases
Individuals with mutations in excision repair enzymes may suffer from ____ due to unrepaired DNA damage caused
by ____. a. skin cancer; mutations inherited from their parents b. colon cancer; the passing of DNA mutations to daughter cells c. prostate cancer; telomerase d. skin cancer; the sun’s UV rays e. skin cancer; complementary base pairing
What is the primary composition of the mitotic spindle?
a. microtubules b. intermediate filaments c. keratin d. actin filaments
The modified amino acid fMet is essential for
A) bacterial translation. B) bacterial transcription. C) eukaryotic transcription. D) eukaryotic translation. E) eukaryotic mRNA processing.