The chloroplasts of land plants are thought to have been derived according to which evolutionary sequence?
A) cyanobacteria ? green algae ? land plants
B) cyanobacteria ? green algae ? fungi ? land plants
C) red algae ? brown algae ? green algae ? land plants
D) cyanobacteria ? red algae ? green algae ? land plants
A
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Which of the following was first produced commercially using recombinant DNA technology?
A. hepatitis B vaccine B. interleukins C. human insulin D. human growth hormone
Which technique did Rosalind Franklin use to determine many aspects of DNA’s structure?
a. transformation b. transmission electron microscopy c. density-gradient centrifugation d. x-ray crystallography e. chromatography
In the fractionation of homogenized cells using centrifugation, the primary factor that determines whether a specific cellular component ends up in the supernatant or the pellet is
a. the relative solubility of the component. b. the size and weight of the component. c. the percentage of carbohydrates in the component. d. the number of enzymes in the fraction. e. the presence or absence of lipids in the component.
Most bacteria inside and on the human body cause diseases.
Indicate whether the statement is true or false