Answer:
Explanation:
To measure correctly the volume of a liquid in a graduated cylinder, you must follow these recomendations:
- Place the graduated cylinder in a leveled and quite surface (the cylinder must not me vibrating or moving in any way).
- Place your self so that your eyes are at the level of the vertex of the meniscus. The meniscus is the curved surface of the liquid inside the vessel (the cylinder in this case).
- Read the two smallest marks on the cylinder between which the vertex (the bottom of the meniscus in this case) is. The measure is taken as the average between those two small marks.
The first and second recomendations are supposed to be correctly handled to take the picture. So, you must now follow the recomendations about reading around the bottom of the meniscus.
In the figure the bottom of the meniscus is between the marks 24 ml and 25 ml, so the correct measurement is (24ml + 25ml)/2 = 24.5 ml.
As you see, although the cylinder is calibrated to read 1 ml, you can appreciate up to half one miliiter, 0.5 ml.
The correct number of <em>significant figures</em> includes the certain digits (24) and one uncertain figure: the decimal 5.
<u>Conclusion: </u>Hence, the volume reported with the correct number of significant figures is 24.5 ml
Answer:
Inhibitor
Explanation:
Enzyme inhibitors are compounds that can interact with the enzyme but don't trigger any biological response. This is what sulfanilamide does. When the enzyme is bound to sulfanilamide, it stops being able to bind PABA, its normal substrate, and so it cannot perform its biological action. In consequence, the entire biosynthetic pathway for folic acid is stopped.
Answer:
Enzyme function is dependent on the three-dimensional structure or conformation of the enzyme
Explanation:
Enzyme are biological catalysts.
So they do alter the path of the reaction where the free energy change (or activation energy) is low then the non enzymatic pathway.
Thus the statement
Enzymes alter the free energy change (ΔG) of the reactions which they catalyze : True
It is known that for enzyme we function they need an optimum temperature and pH condition so the statement
Enzyme function is dependent on the pH and temperature of the reaction environment: true
This is also true that
Enzyme activity can be inhibited if the enzyme is bound by a noncompetitive inhibitor.
The false statement is : Enzyme function is dependent on the three-dimensional structure or conformation of the enzyme
Answer:
Explanation:
Scientific notation is the way of writing numbers which are either large or small. The number is written in the scientific notation when the number is between 1 and 10 and then multiplied by the power of 10.
The given number:
450.0000345 can be written as
Answer upto 4 significant digits =
Answer: The author used the word "conversely" because the first statement he made is in CONTRAST to the second statement he made.
Explanation:
Matter is made up of atoms or molecules that are in constant motion. The motion of these tiny particles ( molecules) gives the object energy. The movement of these molecules depends on the state of matter which includes
--> GASEOUS STATE: Here, the particles are completely free to move and are always in motion.
--> LIQUID STATE: particles in this state slide by one another and are always in motion.
--> SOLID STATE: particles in this state are held tightly together but are always in motion.
Also, the molecules in motion are greatly affected by temperature changes. Increase in temperature will cause the particles in the liquid to move faster. Such is seen when soup is heated, the molecules travel faster than before. But the OPPOSITE is seen in an ice cube. This is because the ice cube is in solid state and of a lower temperature.