The mechanism is straightforward: in Metaphase one of Meiosis, chromosomes line up in two lines, with homologous across from each other, which allows them to interact by crossing over. In Metaphase of Mitosis, the chromosomes are all lined up single file, so the homologous chromosomes cannot interact.
The flexible lipid bilayer that surrounds the cell and acts as a selectively permeable barrier that regulates what enters into and what exits out of the cell would be the cell or plasma membrane.
The giant axon of a squid, shows that hyperpolarizing stimulus is followed by transient inward capacitive current and lasting outward capacitive current.
Hyperpolarization is a change in a cell's membrane potential that makes it more negative. It is the opposite of a depolarization. It inhibits action potentials by increasing the stimulus required to move the membrane potential to the action potential threshold.
Hyperpolarization can be caused, for instance, by opening channels that allow positive ions to move out of the cell (or negative ions to move in).
The hyperpolarization-activated current is an inward current activated by hyperpolarization from the resting potential and is an important modulator of action potential firing frequency in many excitable cells.
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Answer:
The correct answer is a. hydrogen bonds between the amino group of one peptide bond and the carboxyl group of another peptide bond.
Explanation:
The secondary structure of proteins are formed by α-helices and β-structures, that can be supported by hydrogen bonds between amine hydrogens and another peptide bond.
