The thick filament is composed almost entirely of _____ molecules.

A. actin
B. myosin
C. troponin
D. tropomyosin
E. thrombin


B. myosin

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology