What evidence supports the hypothesis that humans originated in Africa?
A) H. sapiens genomes contain some alleles from Neanderthal genomes.
B) One Y chromosome lineage is that originated 1,000 years ago is found in 8% of modern day Asian men.
C) Alleles of nuclear genes are less variable in African populations than in other populations.
D) Mitochondrial DNA sequence variation is higher in African populations than in other populations.
D) Mitochondrial DNA sequence variation is higher in African populations than in other populations.
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Relaying a message from a receptor protein to a molecule that performs a specific function within a cell is called?
A) signal transduction B) inhibition C) self-recognition D) selective permeability
Which of the following statements about the electron transport chain is true?
a. Protons are pumped out of the mitochondria by the complexes of the electron transport chain. b. The proton gradient established during electron transport is a form of potential energy. c. The electron transport chain can be found in the mitochondria of aerobic bacteria and other cells. d. The movement of protons down a concentration gradient is an endergonic process. e. ATP synthesis associated with the electron transport chain is an example of substrate level phosphorylation.
The binding of active CAP near the lac operon promoter decreases the rate of transcription of the lac
operon. __________________ Indicate whether the statement is true or false.
Microarrays are created by robotically placing DNA on to a microscope slide and probing with
A. STSs from the tissue of interest. B. RNA from the tissue of interest. C. clone-by-clone sequencing. D. another DNA from the tissue of interest. E. SNPs from the tissue of interest.