As hinted in the question, the cross bridge cycle is a
series of molecular events that occur after excitation of the sarcolemma. A
cross bridge is formed when a myosin head bound to actin. The cross bridge
cycle depends on the presence of calcium ions
Cesium is used in the separation of DNA with different densities. Cesium chloride (CsCl) acts as a density gradient for the separation of the DNA (Deoxy ribonucleic acid), and is used in gradient centrifugation.
CsCl density centrifugation:
- CaCl solution is kept in the centrifuge tube along with the DNA sample to be separated.
- The centrifugation causes the solutions to form bands with the denser part at the bottom and the least denser part at the top.
- The DNA with its density similar to a particular layer of CsCl solution density forms a band in that layer.
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Polymerase chain reaction to amplify the DNA would be the technique used in the blood lab.
Answer: C. The heart rate gets faster.
Explanation:
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An independent variable that is manipulated means to achieve a particular effect or tested to determine if it is the cause of the effect.
For example, to find out if your weight depends on the amount of calories you consume, you could lower your caloric intake (calories is the manipulated variable) for a period of time and see how your weight changes in response.
