Cellulose is found in the cell walls of plant cells. It is permable so any substance disolveabls in water can pass through so it dose not act as a barrier. It gives the cell its strength and support. As water moves in to the cell by osmosis it stops the cell from bursting.
The correct answer is A
The scientist can determine that this nucleic acid is a DNA molecule, because it contains Thymine, which does not occure in the RNA molecule. The RNA molecule contains Adenine, Guanine and Cytosine just like the DNA, but unlike the DNA it contains Uracil, not Thymine.
Secondly, the scientist can say with certainty that this DNA molecule is surrounded by a nucleus based on the structure of the nucleic acid described. Only eukaryotic cells have ladder structure. The prokaryotic cells have circular DNA and do not have any organelles, like the nucleus. Therefore, from the ladder structure of the DNA the scientist can see that the cell has a nucleus.
1. it is a non spontaneous chemical reaction
2. change in gibs free energy (∆G) is positive ie., ∆G>0
3. entropy is included in any change in gibs free energy. ie, ∆G= ∆H-T.∆S
where,
∆G = change in gibs free energy
∆H= change in enthalpy
∆S= change in entropy
T= temperature in kelvin
4. in this reaction the total amount of energy is a loss, (ie., more energy is needed to start the reaction than the energy obtained from it)
5. total energy is a negative net result.
6. in metabolism endergonic process is anabolic, ie., energy is stored.
7. examples: protein synthesis, Na+/K+ pump (drives nerve conduction and muscle contraction).
Enzymes are catalysts, which means that they make chemical reactions go faster, but are not changed by the reaction. For example, digestive enzymes cause food that you eat to be broken down much faster than would occur without them, but they are not broken down in the reaction they are speeding up.
Research has shown that people who have a chronic disease or have low energy levels also have lower enzyme content in their blood, urine, and tissues. While there is clearly a direct relationship between disease states and a person's enzyme levels, only recently has the NATURE of that relationship been better understood. Researchers began to question if a person's enzyme levels were low because they were sick or were they sick because their enzyme levels were low. The researchers found something surprising.
<span>A person may not have a low enzyme content because he is sick or old, but instead, the reason a person may be sick or old is because of low enzyme content.</span>
