Eukaryotic transcription factors are best described as:
a. regulators of transcription initiation of operons.
b. containing only a regulatory domain.
c. containing only a DNA binding domain.
d. containing a DNA binding domain plus one or more regulatory domains.
e. imprinted genes.
d
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Water treatment processes for drinking water
A. are similar to wastewater treatment. B. are only necessary when using recycled water. C. includes disinfection but not filtration. D. has no biological treatment phase.
A purebred plant that produces yellow seeds is crossed with a purebred plant that produces green seeds. The F1 plants have yellow seeds. What is the expected phenotypic ratio of seed color of the offspring of an F1 × F1 cross?
A. 1:2:1 B. 2:1 C. 3:1 D. 9:3:3:1
How many different alleles for ABO blood types in the total human population exist?
a. two b. three c. four d. six e. nine
Which taxon has been assigned to a number of ”supergroups”?
a. Class Carnivora.
b. Order Carnivora.
c. Phylum Protists
d. Class Chordata.
e. Order Mammalia