When the coronary artery is severely blocked, which method represents a favorable and immediate treatment?
a. statin drugs
b. blood pressure medications
c. coronary bypass
d. an exercise program
e. a change in diet
c. coronary bypass
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You have isolated DNA for PCR and accidentally added topoisomerase instead of polymerase to your sample. What would you expect if you ran this DNA sample on a gel?
A) The DNA would show increased supercoiling and have a lower electrophoretic mobility. B) The DNA would show decreased supercoiling and have a higher electrophoretic mobility. C) The DNA would show increased supercoiling and have a higher electrophoretic mobility. D) The DNA would show decreased supercoiling and have a lower electrophoretic mobility. E) The DNA would show decreased supercoiling, but electrophoretic mobility will be unaffected.
All of the following occur during the latent period of muscle contraction EXCEPT which one?
A) Myofibrils shorten. B) Calcium is released from the sarcoplasmic reticulum. C) Muscle cell membrane initiates an electrical impulse, which travels into the muscle cell. D) Myosin heads bind to actin filaments. E) Troponin-tropomyosin complex shifts, exposing myosin heads.
In C3 plants, the Calvin cycle occurs in the chloroplasts of ________ cells, but in C4 plants, the Calvin cycle occurs in the ________ cells
Fill in the blank(s) with correct word
Semiconservative replication is so-called because one strand of each new DNA molecule is ____________________, while the other is ______________________.
Fill in the blank(s) with the appropriate word(s).