The power stroke corresponds to which event in muscle contraction?
A. cross-bridge formation.
B. sliding of actin with respect to myosin
C. cocking of the myosin head
D. binding of the myosin head to actin
B
You might also like to view...
RNA catalysis was discovered by Thomas Cech and his coworkers when the experimental control tube with only RNA and no protein showed enzymatic activity. This discovery would most likely be described as:
A. model building and calculation. B. exploration and observation C. inspiration. D. serendipity.
The conditions normally present in food such as moisture, acidity and nutrients are referred to as
A. extrinsic factors. B. intrinsic factors. C. endogenous factors. D. exogenous factors
Which of the following substances that are carried in blood can not diffuse across endothelial cells of a capillary?
a. carbon dioxide b. proteins c. small lipid-soluble molecules d. oxygen
GPI-anchored proteins are synthesized
a. on free ribosomes and attached to the GPI group on the outside of the ER. b. as transmembrane proteins, cleaved, and attached to the GPI group on the inside surface of the ER. c. as transmembrane proteins, cleaved, and attached to the GPI group on the cytosolic surface of the ER. d. into the lumen of the ER and attached to the GPI group on the inside surface of the ER.