What is the correct order of events that occur during muscle contraction?
1) muscle shortens
2) calcium binds to troponin
3) filaments slide
4) T tubules are depolarized
5) acetylcholine is released
6) ATP molecule is split
a. 4 ? 5 ? 2 ? 1 ? 3 ? 6
b. 4 ? 2 ? 5 ? 6 ? 1 ? 3
c. 5 ? 2 ? 4 ? 1 ? 6 ? 3
d. 6 ? 2 ? 5 ? 4 ? 3 ? 1
e. 5 ? 4 ? 2 ? 6 ? 3 ? 1
e
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Whether during mitosis or meiosis, sister chromatids are held together by proteins referred to as cohesins. Such molecules must _____
A) persist throughout the cell cycle B) be removed before meiosis can begin C) be removed before sister chromatids can separate D) reattach to chromosomes during G1 E) be intact for nuclear envelope re-formation
Bivalves lack which of the following molluscan
features? a. foot b. radula c. mantle d. shells e. visceral mass
The site on the surface of a reactant where it binds to the enzyme is called the:
A) reactive site B) active site C) binding site D) allosteric site E) entropy
Endoplasmic reticulum (ER) with many ribosomes attached is called ________ ER, whereas endoplasmic reticulum that is mostly devoid of ribosomes is called ________ ER.
What will be an ideal response?