If the membrane only allows osmosis to take place, the cell would shrink.
Osmosis is the thermal movement of water molecule (solvents) through a selectively permeable membrane (the cell membrane) from a region of low concentration of solute to a region of high concentration of solute.
When a cell contains 50% solute and 50% solvent is means it is isotonic.
When a solution surrounding a cell contains more solute (70%) and less solvent (30%) than the cell, it is said to be hypertonic.
Therefore when an isotonic cell is placed in a hypertonic solution, there would be movement of water molecules from the cell, which has low concentration of solute to the surrounding solution with high solute concentration.
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Answer:
a neurotransmitter binds to its receptor on a receiving cell
Explanation:
Answer:
b
Explanation:
because because it's talking about the five kingdoms and b the correct answer
From glucose ATPs are produced.
ATP:
- One glucose molecule is divided into two pyruvate molecules during glycolysis, requiring two ATP molecules while generating four ATP molecules and two NADH molecules.
- For the cell to utilize as energy, glycolysis results in a net gain of two pyruvate molecules, two ATP molecules, and two NADH molecules.
- Glucose breaks down into pyruvate and energy during glycoses
- From glucose 6- phosphate to lactate 3 ATPs are produced.
- ATPs are generated from which one is utilized when fructose phosphate is converted to fructose bisphosphate. So the net yield is ATP.
From dihydroxyacetone phosphate 2 ATPs are produced.
As the cycle occurs only once either from DHAP or PGAL (glyceraldehyde phosphate)
Three irreversible reactions of glycolysis:
Hexokinase
Glucose + ATP Glucosephosphate + ADP
Phosphofructokinase-I
Fructosephosphate + ATP Fructosebisphosphate ADP
Pyruvate kinase
Pyruvate ATP
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Answer:
b. Cellular clock is the correct answer.
Explanation:
Cellular clock theory states that cells can divide a maximum of about 75 to 80 times, and that as we age our cells become less capable of dividing.
Cellular clock theory directs on the lifespan of organisms. As the many individual cells do not remain to reproduce continually, so this theory implies that aging of the cells is a result of their reproductive limitation and because of cellular aging.
Cellular clock theory is the theory Leonard Hayflick's that describes the cellular aging mechanism and it suggests that as the cell becomes aged it becomes less effective of dividing.