What region of a steroid is hydrophilic?
A) the methyl (-CH3) groups
B) the terminal hydroxyl group
C) the ring structures
D) the long hydrocarbon chain
Answer: B
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Each of the following statements is a basic principle of the cell doctrine EXCEPT which one of the following?
A) All cells have a nucleus and organelles. B) All living things are composed of cells and cell products. C) A single cell is the smallest unit that exhibits all of the characteristics of life. D) All cells come from preexisting cells.
Which of the following is the correct order of the levels of DNA packaging in eukaryotic chromosomes?
A) nucleosome ? chromatin fiber ? looped domains ? heterochromatin B) nucleosome ? looped domains ? chromatin fiber ? heterochromatin C) heterochromatin ? nucleosome ? chromatin fiber ? looped domains D) chromatin fiber ? heterochromatin ? nucleosome ? looped domains E) chromatin fiber ? nucleosome ? looped domains ? heterochromatin
Due to a rapid change in the environment, a population of ants was reduced from one million to one thousand. What
type of genetic drift will occur in the gene pool of this population when it expands again? a. gene flow b. migration c. natural selection d. the founder effect e. a genetic bottleneck
Select the best response to the question. ? ?Which of the following is NOT a safe injection practice?
A) performing hand hygiene before and after administering an injection B) placing a used syringe on the patient's bedside table C) placing a used syringe immediately in a sharps container D) donning gloves prior to giving the injection