The ____ is a functional region found in certain proteins that are important in development. It consists of sixty amino
acids that form four helices.
a. homeobox
b. homeodomain
c. homeogene
d. homeochromosome
e. functional group
b
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Two genes that are located far from each other on the same chromosome will show a higher frequency of recombination than two genes that are close together on the chromosome
Indicate whether the statement is true or false
Which statement best describes autotrophic organisms?
a. Autotrophs are exemplified by fungi. b. Autotrophs are exemplified by animals. c. Autotrophs cannot carry out cellular respiration. d. Autotrophs depend on heterotrophs for food. e. Autotrophs synthesize complex molecules from CO2, water, and energy.
A mutation in the DNA-binding domain of a steroid hormone receptor is most likely to affect what aspect of receptor function?
A. the cellular response to the hormone B. the translocation of the receptor to the nucleus C. the binding of the hormone to the receptor D. the conformational change of the receptor
The proper positioning of bacterial chromosomes at the one-quarter and three-quarter positions prior to septum formation apparently is related to
a. chromosome condensation. b. a chemical gradient from the midpoint to the pole of the cell. c. recombination. d. a network of fibers that attach to the chromosomes and shorten, pulling them apart. e. growth of the bacterial cell wall at the midpoint.