Multicelled fungi live as a mesh of threadlike filaments collectively called ____
a. hyphae
b. hypha
c. mycelium
d. yeast
e. fruiting bodies
c
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Which of the following is the sister group to
human? a. earthworm b. lizard c. tuna d. mouse e. none of these
Zip proteins
a. form the lateral elements of a synaptonemal complex. b. initiate double-strand breaks. c. form the axial elements of a synaptonemal complex. d. bind to broken ends of DNA strands. e. form the central element of a synaptonemal complex.
When both lactose and glucose are available to E. coli, which part of the lac operon regulation assures that glucose will be metabolized first?
A) RNA polymerase transcribes the lac operon to make a single RNA molecule. B) The repressor binds to the operator in the absence of lactose. C) The repressor cannot bind to the operator in the presence of lactose. D) Permease allows lactose to enter the cell when lactose enters the cell. E) CAP binds to cAMP and then to the promoter only in the presence of low glucose.
An mRNA codon reads GUA. If a transition mutation occurs at the third base pair, will the final protein be changed?
What will be an ideal response?