Correct answer is 2 - To breathe
The Stem allows the water to move
Answer:
Option A
Explanation:
The pH of a solution is determined by the following formula
pH = -log [H+]
Here H+ is the hydrogen ion concentration
Thus, if pH is known one can determine the hydrogen ion concentration by taking its antilog.
Hence, option A is correct
Answer: tRNAs function at specific sites in the ribosome during translation, which is a process that synthesizes a protein from an mRNA molecule. Basically its job it's to transfer the RNA to the rRNA so it can "build" the protein.
Explanation:
Answer: B Voltage gated potassium channels.
A) voltage-gated sodium channels
B) voltage-gated potassium channels
C) sodium potassium pumps
D) chloride channels
Explanation:
Tetraethylammonium is a pH- potassium channel blocker;which prevents escape of potassium ions from the intracellular layer of the axon,by blocking the channels. This increases positive ion concentration of the inner axon,( together with other positive charged molecules in the axoplasm). since potassium is a positively charged and intracellular ion
Due to the fact that(TEA) is pH -potassium ion blocker; it has no inhibitory effect on the voltage-gated sodium ion channels, so action potential can progresses. But after the sodium gated channels were closed, action potential drops but the concentration of positive charged potassium ions increases because-
They cannot leave the axoplasm since the potassium votage gated channels has been shu by (TEA)t. This stabilizes the membrane potential, and prevented the cells from returning to resting membrane potential .
