Which of the following is the major family of calcium-mediated cell-surface adhesion molecules?
a. Calmodulins
b. Calsequestrins
c. Cadherins
d. Fibronectins
Ans: c. Cadherins
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Glucose dissolves in water because it ____
a. ionizes b. is a polysaccharide c. is a polar and forms many hydrogen bonds with water molecules d. has a very reactive primary structure e. is an isotope
_______ is a large protein that extends from Z line to M line in a sacromere and accounts for the passive tension response of a stretched muscle fiber.
A. myosin B. titin C. connexin D. actin
Viroids cause a variety of plant diseases and are composed only of:
a. strands of RNA. b. strands of DNA. c. protein coats. d. peptidoglycan. e. a capsid.
In the ABC model of floral determination, a different combination of the three genes specifies each floral organ. Which gene works in combination with the other two?
A. florigen B. B C. ethylene D. A E. C