Once an RNA polymerase molecule has bound to a promoter site and locally unwound the DNA double helix, initiation of _______________ can take place.

During muscle contraction, thin actin filaments lengthen as they slide past thick myosin filaments.

All of the protein subunits of intermediate filaments are encoded by genes in the same gene family.

Myosin creates movements by exerting force on actin microfilaments using energy derived from GTP hydrolysis.

Robert Hooke discovered cells by looking at

Histone modification leads to changes in histone packing where methylation leads to looser packing and acetylation leads to tighter packing. 

An enzyme is required to attach to the secondary antibody in an ELISA experiment.

An increase color concentration in an ELISA experiment suggests there is more antibody present.

Citric acid cycle produces 20-22 ATP

The leech nerve reaction to the brush is strong