Which of the following statements about genomic libraries and cDNA libraries is TRUE?
A. a cDNA library is derived from chromosomal DNA.
B. a genomic library is derived from mRNA.
C. a genomic library is made using reverse transcriptase.
D. a genomic library is derived from mRNA and is made using reverse transcriptase.
E. a cDNA library is derived from mRNA and is made using reverse transcriptase.
E. a cDNA library is derived from mRNA and is made using reverse transcriptase.
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The classic experiment using isolated cells from two species of sponges provided evidence that:
A. Cell adhesion molecules are species specific. B. Sponge cells posses an extracellular matrix. C. Cell adhesion molecules are non-specific. D. Sponge cells have cell adhesion molecules.
Choose the true statements about the human and mouse genomes.
_____ The human genome shares 99% of its genes with the mouse genome. _____ A comparison of genomes confirms that mice and humans shared a common ancestory more recently than humans and pufferfish. _____ Very few genes are conserved in the two genomes. _____ Little rearrangement of genes has occurred in the two genomes.
Choose the correct sequence of events involving allopolyploidy that gave rise to modern tobacco.
A. hybridization, chromosome doubling, duplicate gene loss B. hybridization, duplicate gene loss, chromosome doubling C. chromosome doubling, hybridization, duplicate gene loss D. duplicate gene loss, hybridization, chromosome doubling
Disruption of neural signaling can produce profound changes in mood and behavior. Cocaine exerts its effects by
A. blocking dopamine reuptake from synapses. B. blocking serotonin reuptake from synapses. C. preventing neurotransmitter vesicle fusion with presynaptic neuron membranes. D. blocking the enzyme acetylcholinesterase. E. binding to the GABA receptor to enhance inhibitory neurotransmission.