Which of the following are liquid at room temperature?
a. Phospholipids
b. Oils
c. Hydrogenated oils
d. Steroids
b. Oils
Oils are lipids that are liquid at room temperature. In the food industry, they are sometimes artificially hydrogenated to make them semi-solid, which helps preserve them and increase their shelf life.
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How do myelin sheaths increase the speed with which action potentials are propagated along an axon?
A) They increase the permeability of Na+ ions in the plasma membrane. B) They amplify the action potential by increasing sodium influx along the entire distance of the neuron. C) They cause action potentials to "jump" down the axon rather than travel in a continuous path along every site on the axon.
In codominant inheritance, ____
a. there is partial phenotypic expression of one member of a gene pair in the homozygous condition b. there is full phenotypic expression of both members of a gene pair in the heterozygous condition c. the interaction of two or more non-allelic genes controls a single phenotype d. two recessive alleles interact and express themselves as a single dominant trait e. the phenotype of a heterozygote is intermediate to those of the parents
Which of the following would be most effective and practical for routine home disinfection of a toothbrush between uses?
A. 70% Isopropyl alcohol B. Glutaraldehyde C. Hydrogen peroxide D. Bleach
Two lines of work indicated that crossing over actually involves breakage and reunion of chromatid material. What organisms were involved, and who did the work?
What will be an ideal response?