Pathogens can use ____ mechanisms to change the host DNA, for example, to change patterns of transcription by the process of methylation
a. pathogenic
b. epigenetic
c. mutagenic
d. enzymatic
b. epigenetic
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The citric acid cycle takes place in the:
A. cytoplasm. B. outer mitochondrial membrane. C. inner mitochondrial membrane. D. intermembrane space of mitochondria. E. mitochondrial matrix.
Which of the following statements about steroid receptors is FALSE?
A. The receptors undergo a conformational change after binding the steroid. B. The receptors are localized to the plasma membrane. C. Once the steroid binds the receptor, the steroid/receptor complexes dimerize. D. Steroid receptors act as transcriptional factors, regulating the expression of certain genes and the subsequent production of proteins. E. Steroid receptors are localized to either the cytoplasm or nucleus.
Two species have homologous structures. What can we infer?
a. The structures are identical. b. The structures have the same function. c. The species have very different ancestors. d. The species are related by a common ancestry. e. The structures have the same function and they are identical.
A homeobox gene is one that produces a ________
A) transcription factor that strips methylation from the entire genome B) 60 amino acid DNA binding domain C) repetitive nucleotide sequence such as VNTR D) maternal transcription factors