A system is contained by its boundary; therefore, the size of a system is limited by its boundary.
Besides cell walls, features often found in plant cells but not in animal cells are: <span>· Chloroplast- specialized organelles in which light energy is converted to chemical energy during the photosynthesis(chloroplasts contain chlorophylls a and b-green color of the plant)
</span> <span>· Vacuole-central organelle filled with fluid for storing food (sometimes it is found in animals but rare)</span><span><span>· </span>in animals but rare)</span>
<span><span>· </span>Starch-energy storage of plants (it is glycogen in animals)</span> <span> </span>
Answer:
The Laura tried to grow micro-organisms in culture broth medium in Petri-plates but the microbial growth was not observed even on the fourth day of culture which could be due to:
1. Laura could have not provided the correct broth medium maintaining the with pH and salt concentrations.
2. Microorganisms did not get optimal growth conditions.
3. The bacterial source could have died after the collection which could have lysed after their death and thus no longer visible.
1) Adenosine triphosphate (ATP) is thought of as the "molecular currency" for energy transfer within the cell. Function: ATPs are used as the main energy source for metabolic functions. They are consumed by energy-requiring (endothermic) processes and produced by energy-releasing (exothermic) processes in the cell and Cells store energy in the form of ATP; cells make 36 ATP through cellular respiration.
2) Energy is normally stored long term as carbohydrate, in plants the storage polymer is starch whereas in animals the storage polymer is glycogen. Both of these are formed from the monomer alpha-glucose (C6H12O6). When energy is required by the cell, storage polymers are hydrolysed to yield glucose molecules, which are the starting point of respiration, a series of chemical regions yielding ATP, the universal cellular energy release molecule.
