Answer:
Specificity is the ability of an enzyme to choose exact substrate from a group of similar chemical molecules. The specificity is actually a molecular recognition mechanism and it operates through the structural and conformational complementarity between enzyme and substrate. Enzymes show different degrees of specificity towards their substrate.
Explanation:
for one it would be rising and for two dropping
If the temperature is increased, then the amount of oxygen released by the plant during photosynthesis will decrease. If the temperature is too high the enzymes lose their shape and become unable to function properly, and the rate of photosynthesis decreases.
I hope this helps in anyway!
Answer:
The correct answer is: D) the pivoting of the myosin head, which causes actin and myosin to slide relative to each other.
Explanation:
<u>Muscle contraction</u><u> occurs when the sarcomere is shortened.</u> The sarcomere is a structure composed of filaments: the thick ones are composed of myosin, and the thin ones are composed of actin. These two proteins interact with one another to make the sarcomere shorten and produce the contraction of the muscle.
Muscle, in its natural state, is not contracted. This is because <u>the binding sites on actin for the myosin heads are covered</u> by the proteins troponin and tropomyosin.
When the signal for muscle contraction arrives at the muscle, calcium ions are released from the sarcoplasmic reticulum and reach the sarcomere to reconfigure the complex formed by troponin and tropomyosin so <u>the binding site on the actin filament becomes exposed and the myosin head can attach to it.</u>
When an ATP molecule appears and binds to the myosin head, the latter separates from the actin-binding site and moves toward the next actin-binding site with the energy provided by the hydrolysis of this ATP molecule. This is what is called power stroke.
This keeps on happening until muscle contraction is no longer needed and calcium ions are reabsorbed, which will make troponin and tropomyosin cover the actin-binding sites once again.
Explanation:
Pollination is the transfer of pollen grains from
an anther to a stigma . Pollen can be transferred
by an animal or by the wind. Fertilization takes
place inside the ovary when the nucleus
of pollen grains fuses with the nucleus of
an ovule to produce a zygote