In a strand of DNA, a cytosine base has been replaced by guanine. What kind of mutation has occurred?
a. frameshift mutation
b. transition substitution
c. transversion substitution
d. translocation
c. transversion substitution
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The "9 + 2" pattern of the axoneme is nine ________ of microtubules and two additional microtubules in the center called the ________.
A) outer doublets; central pair B) basal bodies; inner two C) central tubules; double pair D) circular structures; middle two E) triplet groups; basal bodies
If the DNA sequence is ATG-CGT, the mRNA codons are
a. AUG-CGU. b. ATG-CGT. c. UAC-GCA. d. UAG-CGU. e. GUA-CGU.
Norman ate his birthday cake with lots of sugary frosting, so his pancreas secreted ________
A) thyroxin B) glycogen C) insulin D) glucagon
________ are the group of microorganisms composed only of hereditary material wrapped in a protein covering.
Fill in the blank(s) with the appropriate word(s).