Answer:
a) price of an exercise book = #200
b) #400
Explanation:
Let x represent the price of the book
Let y represent the price of the exercise book
- According to this question, the price of the book is thrice that of an exercise book i.e. x = 3y
- Also, the question states that if a student spend #9600 on book and #8000 on exercise book, he has 56 items altogether. This means that to get how many books and exercise books he bought, we divide the price of book and exercise book he bought by the price of each book (x) and exercise book (y) respectively. Mathematically, this means:
- Student bought 9600/x books
- Student bought 8000/y exercise books
So, 9600/x books + 8000/y exercise books = 56 item
9600/x + 8000/y = 56
Since x = 3y
We can say;
9600/3y + 8000/y = 56
Find the L.C.M of 3y and y = 3y and solve using fraction method (see attachment).
9600 + 24000/3y = 56
33600/3y = 56
Cross multiply
33600 = 56 × 3y
33600 = 168y
Divide both sides by 168
33600/168 = 168y/168
200 = y
y = 200
Since, x = 3y
x = 3 × 200
x = 600
Therefore, the price of book (x) and exercise book (y) are #600 and #200 respectively.
b) The difference between the price of a book and an exercise book i.e. x - y
= #600 - #200
= #400
I believe the answer is water
Answer:
option A " Polymerace chain reaction" (PCR)
Explanation:
polymerace chain reaction is a method in which millions to billions copies of DNA is formed by taking small about of DNA and amplify it for further studies.
It has following three steps:
1- Denaturation : in which un-winding of DNA occur by means of heat at approx 90 degree Celsius for some seconds
2- Annealing: is a step in which DNA priming occur.
3- Extension: complementary nucleotide is added.
Answer:
The phenomenon of generating cellular energy in the presence of oxygen is termed as aerobic respiration. In the process of aerobic respiration, the generation of 36 ATPs takes place. The initial step of aerobic respiration is glycolysis, which is followed by the citric acid cycle and electron transport chain.
On the other hand, the phenomenon of generating energy in the absence of oxygen is termed as anaerobic respiration. It is a comparatively faster process in comparison to aerobic respiration in which the generation of two ATPs takes place. The phenomenon of anaerobic respiration takes place within the cytoplasm, where energy is discharged from glucose by the process of glycolysis, and the recycling of NADH takes place back to NAD+ by the process of fermentation.
Thus, it can be seen that the process of glycolysis takes place both in aerobic and anaerobic conditions.
Answer:
enzymes are biological catalysts which speeds of up chemical reactions which is occuring on an organism
Explanation:
when an enzyme is deposited to a metabolic reaction, the active site of the enzymes me will be attaching to the substrate particle. then the substrate particle will be broken down to product particles
eg : starch + amylase gives maltose
