While standard two-component regulatory systems typically act to control gene transcription, phosphorelay systems can act either to control gene transcription or to control .
A. DNA replication
B. translation
C. protein activity
D. All of the choices are correct.
Answer: C
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Which of the following is NOT a characteristic of most animals?
A. They have Hox genes. B. They are heterotrophic. C. They have an extracellular matrix of proteins such as collagen. D. They have cell walls. E. They have a nervous system.
What are the charophytes?
A) Algae that live symbiotically with fungi B) An extinct group of protists that may have given rise to the fungi C) Smallest living plants D) Closest living ancestors of the first plants
What type of mutation leads to a frameshift in the reading of DNA?
A) All point mutations B) Insertions only C) Deletions only D) Both insertions and deletions
The breast cancer gene BRCA1 has a very similar sequence in humans, mice, and gorillas, due to its origination in a common ancestor. The BRCA1 genes in these species are examples of ________.
A. polyploidy B. synteny C. paralogs D. orthologs