Briefly describe the sequence of events that take place in muscle contraction. What will be an ideal response?
Concepts to Consider: Motor neuron releases acetylcholine; depolarization of membrane and T
tubules; calcium released from sarcoplasmic reticulum and binds to troponin, causing conformational
change; pushes tropomyosin away from active sites on actin filaments; ATP is split and myosin heads
bind to actin, forming cross bridge; ADP and phosphate are released; cross bridge flexes and filaments
slide past each other; actin-myosin complex binds ATP and complex disassembles.
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Automated nucleotide sequencing machines detect DNA bands by laser induced ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is a disaccharide?
A) galactose B) lactose C) fructose D) glucose E) amylose
Approximately, what percent of unplanned
pregnancies end in induced abortions?
a. 5 b. 25 c. 50 d. 75 e. 90
What is the structure of centromeric DNA sequences?
What will be an ideal response?