In A. thaliana, genes encoding proteins involved in secondary cell wall development are regulated by an average of
five different ____.
a. tissues
b. lignins
c. transcription factors
d. ribosomes
e. genes
ANSWER: c
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Many insects, like moths and flies, undergo complete metamorphosis. What would you predict about gene expression in these two kinds of insects?
A. The same genes are expressed at each stage, but the age and number of cells accounts for the minor morphological differences. B. The basic organization of homeotic genes is the same in both larvae and adult, but the expression of some other genes must be different. C. Completely different sets of genes must be used in the development of larvae and the adult. D. The order of homeotic genes along the body axis must be different in larvae and adult.
When an atom of water is irradiated it first dissociates into _____.
a) two water atoms b) an ion pair c) free radicals d) hydrogen peroxide
Fungal infections are called
A) mycoses. B) dimorphic. C) coencytic. D) sporgangia. E) basidium.
The hydrolysis of GTP to GDP carried out by tubulin molecules ________________
(a) provides the energy needed for tubulin to polymerize. (b) occurs because the pool of free GDP has run out. (c) tips the balance in favor of microtubule assembly. (d) allows the behavior of microtubules called dynamic instability.