ABO blood types are controlled by
a. single genes.
b. multiple alleles.
c. incomplete dominance.
d. codominance.
e. both multiple alleles and codominance.
E
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If the peptidoglycan layer is between two plasma membranes in an organism, that organism is ____
a. Gram-negative b. an archaean c. Gram-positive d. chemoautotrophic e. eukaryotic
The protists most closely related to animals and fungi are the ciliates
Indicate whether the statement is true or false.
A strain of mutant bacteria has been isolated. You isolate the mRNA corresponding to the mutated gene from this bacterial strain to use in an in vitro translation system and note that even in vitro it is difficult to use this message and obtain protein
Of the following, which is a likely explanation for these results? A) There may be a mutation in the Shine–Dalgarno sequence of the DNA, resulting in mRNA that binds poorly to the ribosome. B) There may be a mutation in the ribosomal rRNA recognizing the Shine–Dalgarno sequence of the message. C) This mutant may have altered tRNA molecules, such that the codon–anticodon interaction during translation is affected. D) This mutant may not manufacture enough translation factors for effective translation. E) In this mutant, the ribosomal subunits may not associate well enough for effective translation.
The bivalves started to die one by one; only the undamaged shells remained. To keep the remaining bivalves alive, the teacher would most likely need to remove the _____
A) sea anemones B) sea star C) gastropods D) ectoprocts