Answer: The options are missing from the question.
A) Na+ is bound
B) ADP is bound
C) The pump is phosphorylated
D) The pump changes conformation
The correct answer to the question is option C
THE PUMP IS PHOSPHORYLATED
Explanation: Sodium potassium pump (Na+ K+ pump) is a mechanism that uses active transport to move sodium Na+ and potassium K+ in and out of cellular compartments (intracellular and extracellular) inorder to maintain a gradient. It is responsible for maintaning a high extracellular sodium ion concentration and a high intracellular potassium ion concentration.
Once the sodium-potassium pump hydrolyses ATP,the pump will become phosphorylated (transmission of signal throughout the cell) lowing the affinity of the pump to sodium,this causes 3 sodium ions to move out of the intracellular compartment into the the extracellular compartment. The pump further brings two potassium ions together causing a dephosphorylation(inhibition of signal transmission throughout the cell) and then moves the 2 potassium ions out of the cell. This mechanism continues till there is a higher extracellular sodium concentration and a high intracellular potassium concentration therefore achieving the desired gradient(optimum)
Interphase is the phase before it starts mitosis in which the cell grows and replicates both it’s DNA and organelles. This phase takes up 78% of the cell’s lifetime = 561.6 minutes
Prophase takes up around 14% of the cell’s life cycle = 102.8 minutes
Metaphase involves 4% of the total mitosis cycle so = 28.8 minutes
Anaphase is the shortest phase of mitosis, taking up only 0.8% of the cycle = 5.2 minutes
Telophase is the final phase of the mitosis cell cycle and lasts around 3% of the total time = 21.6 minutes
<span> water is a solvent. It helps to break waste and nutrients down in the </span>cell so <span>that they can be moved through the various membranes. this is necessary in a cell </span><span />
Answer:
D. MicroRNA-1/206 targets c-Met mRNA for destruction via RISC.
Explanation:
microRNA's are non-coding RNA's, that is, they are not translated to proteins. MicroRNA-1/206 leads to gene silencing by 'tagging' the c-Met mRNA for cleavage by RISC proteins.
RISC: RNA-induced silencing complex is a ribonucleoprotein complex that leads to the incorporation of a single strand of micro RNA (or siRNA) that will bind to the targeted mRNA. The microRNA or siRNA strand will tag the targeted RNA for cleavage by proteins from the ribonucleoprotein. No translation will occur.
With Freezing.... the substance energy level decreases.
Freezing is endothermic and as such energy is lost to the environment
from the substance thus decreasing the energy level.
