Which of the following, pertaining to prokaryotic cell membranes, is mismatched?
A. function - regulates transport of nutrients and wastes
B. form a bilayer - phospholipids
C. internal folds - mesosomes
D. unique hydrocarbon present - cyanobacteria
E. sterols present - mycoplasmas
Answer: D
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Genes for drug resistance may be present ________.
A. on plasmids B. on the chromosome C. both on the chromosome and on plasmids D. on mitochondrial DNA
The vestibule contains two fluid-filled chambers, called the utricle and saccule, which are alike in that
A) they both are surrounded by cupular membranes. B) each has a gel-like substance on the inside. C) both contain ampulla. D) they are directly attached to semicircular canals. E) each lines the semicircular canals.
One function of antibodies is to ________
A) deactivate defensive proteins B) stimulate the production of antigens C) phagocytose invading bacteria D) clump invader cells
What is the normal complement of sex chromosomes in a human male?
A) two Y chromosomes and zero X chromosomes B) two X chromosomes and one Y chromosome C) one X chromosome and one Y chromosome D) one Y chromosome and zero X chromosomes