Proteins that assist in the movement of substances across can be classified into two types which are:
<h3>What are Proteins?</h3>
These are biological molecule which consists of amino acid sequences and are involved in metabolic activities in the body.
They are also found in cells and help in the selective movement of molecules in and out of the cell.
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Answer:
Power stroke (myosin head bends) coupled with the release of ADP and phosphate
Explanation:
Muscle contraction results from myosin heads adhering to actin and attracting it inwards. It uses ATP. Myosin adhers to actin at a binding site of its globular actin protein and adheres at another binding site for ATP (hydrolyzed ATP to ADP, Pi and energy)
ATP binding prompts myosin to detach from actin, ATP is changed to ADP and inorganic phosphate, Pi by ATPase. The energy formed at this process orientates myosin head to a “cocked” direction.
The myosin head goes in the direction of the M line, holding the actin with it in the process causing the filaments to orientate nearly 10 nm in the direction of the M line--- power stroke (force is produced), the sarcomere reduces in length and the muscle contracts.
Note: The power stroke is seen when ADP and phosphate disattaches itself from the myosin head.
At the terminal point of the power stroke, the myosin head as low-energy, followed by ADP release.
The attached image shows the cross-bridge muscle contraction cycle, which is activated by Ca2+ sticking to the actin active site. And how actin moves in relation to myosin.
Answer:
Energy Conservation
Explanation:
Energy Conservation involves using less energy service in an effort to reduce the amount of energy being consumed.
Julie reduces the energy she uses on a normal day by turning her lights off when they are not in use. This will save the amount of energy that would be wasted when the lights are turned on when not needed by Julie. Also, when she unplugs all electronic devices at night, energy is conserved. Julie has conserved energy in these simple acts of hers by reducing wastage, and thereby reduced the pressure on the demand for more energy. By so doing, the need for energy service is reduced which in turn would have positive impact on the environment.
Environmental quality is improved as energy conservation reduces the need for energy services.
Answer:
Herbicides kill or suppress plants by interfering with essential plant processes such as photosynthesis. All of the interactions between an herbicide and a plant from application to the final effect are referred to as the mode of action.
Explanation:
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Answer:
1. is Yes 2. is Yes 3. Is no 4. is Yes
