We refer to water as a solvent. Why do oil and water not mix then?
a. Oil cannot break the surface tension of water.
b. Oil forms hydration shells around the water molecules.
c. Water can only dissolve polar molecules and ionic compounds. Oils (lipids) are nonpolar.
d. Water can only dissolve nonpolar compounds. Oils (lipids) are polar.
c. Water can only dissolve polar molecules and ionic compounds. Oils (lipids) are nonpolar.
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What structure produces estrogen and progesterone?
A) endometrium B) uterus C) corpus luteum D) oviduct
Select the best response to the question. ?Candida infection should be suspected in which of the following situations?
A) a patient with cracking and peeling skin between the toes B) a patient with a lung infection from inhaling soil spores where bats and birds are roosting C) an AIDS patient diagnosed with esophagitis D) a patient with ring-shaped skin lesions
A scientist is using a microarray containing all the genes of a single species. What is the scientist likely to be using this microarray for?
A. gene expression analysis B. investigating a microbial community C. diagnosis of infectious disease D. determining the genetic sequence E. creating a clone library
The disinfectant chemical shown in Figure 9.1 is known as (isopropanol/quats/triclosan).
Fill in the blank(s) with the appropriate word(s).