Answer: option A, B and D
Explanation:
The telomeres found at the terminal ends of eukaryotic chromosomes are long repetitive sequences that protects the DNA from being identify as a damage molecule to encourage fusion with other chromosomes. Since replication does not extend down to these 3' ends, the cell recruits the telomerase enzyme which is a ribonucleoprotein that helps to add telomeric repeats using its own RNA component as template to extend this end. Thus if mutation like a large deletion occurs in the gene encoding for this enzyme, the telomerase would not be able to associate correctly with the telomere, the catalytic center also encoding for its RNA polymerase would be altered and the enzymes will not be able to synthesize new telomeric repeats sequences
the universe consists of all existing matter, energy, and space.
Answer:
The correct answer would be -
Membrane A - Hypotonic solution - the movement of water towards inside the cell
Membrane B - Isotonic soltion - there will be no movement of water
Membrane C - Hyertonic solution - the movement of water towards outside of the cell
Explanation:
This experiment deals with tonicity as this solution will affect the tonicity of the egg membrane. In membrane A there are more solutes inside the cell than outside the cell so it is hypotonic solution so the movement of water will be towards inside the cell.
In membrane B the solutes are equal in both sides so there will be no movement as its isotonic condition while in membrane C the solution is in hypertonic situation as the solutes are more outside than inside.
Thus, the behavior of the membranes are-
Membrane A - Hypotonic solution - the movement of water towards inside the cell
Membrane B - Isotonic soltion - there will be no movement of water
Membrane C - Hyertonic solution - the movement of water towards outside of the cell
Answer:
Na+ only
Explanation:
Depolarisation of membrane refers to the change in the resting membrane potential of the membrane of a cell which is usually -70mv to a more positive value.
This value changes when the positive ions move inside the cell which increases the positive charge inside the cell.
In the myocardial cell, the sodium ions move inside the cell which changes the potential towards the more positive side as a result of which the signals for contraction arises.
Thus, Na+ only is correct.
Answer:
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Explanation:
