The thick filament is composed almost entirely of _____ molecules.
A. actin
B. myosin
C. troponin
D. tropomyosin
E. thrombin
B. myosin
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Which genetic condition has an X-linked recessive inheritance pattern?
a. Duchenne muscular dystrophy b. phenylketonuria c. achondroplasia d. sickle-cell anemia e. cystic fibrosis
According to the acid-growth hypothesis, auxin causes increased acidity in cell walls, which then activates ____ that
disrupt(s) bonds between cellulose microfibrils, allowing cell expansion.
a. a membrane potential b. AUX1 transporters c. proteins called expansins d. an mRNA e. K+ ions
Members of the class _______ are worm-like mollusks that lack a shell and have aragonite spicules on their skin.
a. Monoplacophora b. Aplacophora c. Scaphopoda d. Polyplacophora
Which trait is probably not caused primarily by genes that behave codominantly or epistatically?
A) height B) general body structure C) skin color D) eye color