Extensive irrigation may contribute to global climate change because it may cause droughts in some semi-arid regions of the world.
a. true
b. false
Answer: b. false
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Complementary DNA (cDNA) probes are produced using
A. RNA polymerase. B. DNA ligase. C. restriction endonucleases. D. reverse transcriptase.
During endocytosis, if a bacterial cell is not degraded and bacterial DNA is taken up by the eukaryotic cell, what may have occurred?
A. vertical evolution. B. horizontal gene transfer. C. vertical exon shuffling. D. chromosomal duplication and genomic exchange. E. both chromosomal duplication and vertical evolution.
Which of the following methods is not used to date fossils?
a. the amount of radioisotopes remaining b. index fossils c. the relative position in rock strata d. uranium-235 e. nitrogen-14
Membrane curvature is influenced by the differential lipid composition of the two membrane monolayers
Which factor do you think has the largest impact on the curvature of biological membranes? (a) amount of cholesterol (b) charge of the lipid head group (c) length of the hydrocarbon tails (d) size of the lipid head group 11-26 Glycolipids are found on the surface of healthy cells, and contribute to the cell's defense against chemical damage and infectious agents. A. In which organelle are sugar groups added to membrane lipids? B. By what mechanism are glycolipids transported to the plasma membrane and presented to the extracellular environment? Draw a diagram to support your answer to part B. Membrane Proteins