Cancer cells ____
a. maintain telomerase function
b. have longer telomeres than normal cells
c. eventually die due to shortening chromosomes
d. have circular chromosomes
e. cannot replicate their DNA
ANSWER: a
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About 80% of the alleles present in thoroughbred horses can be dated back to 31 known ancestors from the late eighteenth century. As a result, one would expect _____
A. random mating. B. Hardy-Weinberg equilibrium. C. low rates of mutation. D. many polymorphic alleles. E. little variation in physiology and behavior.
DNA replication and gene expression in archaeans more closely resemble eukaryotic cells than the same processes in bacteria. However both Bacteria and Archaea are prokaryotic. What does this suggest?
A. Eukaryotic cells are descended from modern Archaeans. B. Bacterial cells are not related to Archaeans. C. Eukaryotic cells shared a more recent common ancestor with Archaeans than with bacterial cells. D. There must have been 2 origin events, one producing the bacteria and the other producing Archaeans and eukaryotic cells. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about phylogenetic trees? How does it relate to the question? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of these contains two haploid nuclei?
a) the heterokaryotic stage of the fungal life cycle b) zygote c) spore-producing structures d) mycelium e) hypha
A long poly-A-tail is necessary to initiate translation. Which protein binds directly to eIF4E to inhibit translation initiation?
A) PARN B) poly-A polymerase C) PABP D) CPEB E) maskin