Membrane fluidity is affected by
A. hydrophilic tails, hydrophobic heads, and cholesterol.
B. types of fatty acids, and waters affinity for hydrogen bonding.
C. temperature, cholesterol, and types of fatty acids.
D. size of molecules, polarity of molecules, and temperature.
Answer: C
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If a population of 1000 individuals has 160 aa genotypes, 320 Aa genotypes, and 520 AA genotypes,
the allele frequency of the dominant allele (A) is: a. 0.16 b. 0.42. c. 0.52. d. 0.68. e. 0.89.
Which of the following is used for both storing genetic information and used as structural support
A. Protein B. Nucelotide C. DNA D. RNA
Antigens can be all of the following except
A) proteins. B) large polysaccharides that protrude from virus surfaces or foreign cells. C) blood or tissue cells from organisms of the same or different species. D) lipids such as cholesterol.
Serotonin is amine neurotransmitter that is derived from (i)__________, and it is deactivated by (ii)___________.
a) (i) tyrosine, (ii) tyrosine hydroxilase b) (i) tryptophan, (ii) moniamine oxidase