Grade 12 Geography Unit 2.pdf
2.9 MB
Grade 12 Geography Short note Unit 1 and 2
What are enzyme models?
Enzyme models are theoretical frameworks that describe how enzymes function to catalyze biochemical reactions. The two most well-known models are:
1. Lock and Key Model: This model suggests that the enzyme's active site (the region where the substrate binds) is precisely shaped to fit a specific substrate, much like a key fits into a lock. According to this model, the enzyme and substrate have complementary shapes, allowing for a perfect fit that facilitates the reaction.
2. Induced Fit Model: This model builds on the lock and key concept by suggesting that the active site of the enzyme is flexible and can change shape upon substrate binding. When the substrate approaches, the enzyme undergoes a conformational change that enhances the fit between the enzyme and substrate, leading to a more effective catalytic process.
Both models illustrate the specificity and efficiency of enzymes in catalyzing reactions, but the induced fit model is generally considered more accurate in describing the dynamic nature of enzyme-substrate interactions. Enzyme models help researchers understand enzyme kinetics, regulation, and mechanisms of action in biological systems.
@maths_group11
@maths_group11
Enzyme models are theoretical frameworks that describe how enzymes function to catalyze biochemical reactions. The two most well-known models are:
1. Lock and Key Model: This model suggests that the enzyme's active site (the region where the substrate binds) is precisely shaped to fit a specific substrate, much like a key fits into a lock. According to this model, the enzyme and substrate have complementary shapes, allowing for a perfect fit that facilitates the reaction.
2. Induced Fit Model: This model builds on the lock and key concept by suggesting that the active site of the enzyme is flexible and can change shape upon substrate binding. When the substrate approaches, the enzyme undergoes a conformational change that enhances the fit between the enzyme and substrate, leading to a more effective catalytic process.
Both models illustrate the specificity and efficiency of enzymes in catalyzing reactions, but the induced fit model is generally considered more accurate in describing the dynamic nature of enzyme-substrate interactions. Enzyme models help researchers understand enzyme kinetics, regulation, and mechanisms of action in biological systems.
@maths_group11
@maths_group11
Which of the following is true about any functions f(x)?
A. If both the value of x and f(x) increase at the same time, the function is increasing.
B. If both the value of x and f(x) is decreased at the same time, the function is decreased.
C. If the value of x is increased and f(x) is decreased at the same time, the function is increased.
D. We can not determine it.
A. If both the value of x and f(x) increase at the same time, the function is increasing.
B. If both the value of x and f(x) is decreased at the same time, the function is decreased.
C. If the value of x is increased and f(x) is decreased at the same time, the function is increased.
D. We can not determine it.
The total cost (in Birr) of producing x iron sheets per day is C(x) = 1000+100x - 0.5x², 0 ≤ x ≤ 100, what is the marginal (rate of change) of cost at production level of 80 iron sheet?
Anonymous Quiz
7%
8.5
37%
20
43%
1800
13%
5800
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What is the Simple Present Tense?
The simple present tense describes actions or states that happen regularly, habitually, or are generally true. It's the most basic tense in English, and we use it to talk about things that are happening now, or that happen on a regular basis.
How we use the verb?
• Regular Verbs: These verbs form their simple present tense by simply adding "-s" or "-es" to the base form of the verb for third-person singular (he, she, it).
* Example: walk -> walks, play -> plays, watch -> watches
• Irregular Verbs: These verbs have unique forms for the simple present tense. They don't follow a predictable pattern.
* Example: go -> goes, have -> has, do -> does
How We Use the Simple Present Tense
1. Regular Habits and Routines:
* I eat breakfast every morning.
* She goes to the gym three times a week.
* They study English on Tuesdays and Thursdays.
2. Facts and General Truths:
* The sun rises in the east.
* Water boils at 100 degrees Celsius.
* Dogs are mammals.
3. Permanent States and Conditions:
* I live in New York City.
* She loves to dance.
* He works as a doctor.
4. Expressing Opinions, Beliefs, or Feelings:
* I think it's a great idea.
* She believes in honesty.
* He feels happy today.
5. Giving Instructions or Directions:
* Turn left at the corner.
* Open the door.
* Please wait here.
6. Making Scheduled Events:
* The train leaves at 10 am.
* The concert starts at 8 pm.
* The meeting is tomorrow at 2 pm.
More Examples
• Regular Habits: The birds sing in the morning.
• General Truth: The earth revolves around the sun.
• Permanent State: He loves his family.
• Opinion: I believe that education is important.
• Instruction: Please close the window.
• Scheduled Event: The flight arrives at 6:30 pm.
The simple present tense describes actions or states that happen regularly, habitually, or are generally true. It's the most basic tense in English, and we use it to talk about things that are happening now, or that happen on a regular basis.
How we use the verb?
• Regular Verbs: These verbs form their simple present tense by simply adding "-s" or "-es" to the base form of the verb for third-person singular (he, she, it).
* Example: walk -> walks, play -> plays, watch -> watches
• Irregular Verbs: These verbs have unique forms for the simple present tense. They don't follow a predictable pattern.
* Example: go -> goes, have -> has, do -> does
How We Use the Simple Present Tense
1. Regular Habits and Routines:
* I eat breakfast every morning.
* She goes to the gym three times a week.
* They study English on Tuesdays and Thursdays.
2. Facts and General Truths:
* The sun rises in the east.
* Water boils at 100 degrees Celsius.
* Dogs are mammals.
3. Permanent States and Conditions:
* I live in New York City.
* She loves to dance.
* He works as a doctor.
4. Expressing Opinions, Beliefs, or Feelings:
* I think it's a great idea.
* She believes in honesty.
* He feels happy today.
5. Giving Instructions or Directions:
* Turn left at the corner.
* Open the door.
* Please wait here.
6. Making Scheduled Events:
* The train leaves at 10 am.
* The concert starts at 8 pm.
* The meeting is tomorrow at 2 pm.
More Examples
• Regular Habits: The birds sing in the morning.
• General Truth: The earth revolves around the sun.
• Permanent State: He loves his family.
• Opinion: I believe that education is important.
• Instruction: Please close the window.
• Scheduled Event: The flight arrives at 6:30 pm.
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[APTITUDE EUEE] [2003-2014].pdf
77.4 MB
SAT Entrance (2003-2014/15)
Grade 12 solved Problem on introduction to calculus.pdf
12.3 MB
Grade 12 solved problems on introduction to calculus
2017 W.SHEET-I.pdf
906.9 KB
Chemistry work sheet for grade 12 students. From grade 11 unit 1 - 6 and from grade 12 unit 1&2.
This work sheet contains 150 multiple choice questions.
This work sheet contains 150 multiple choice questions.
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What is the area of triangle with vertices A(0,5), B(0,0) and C(5,0)?
Anonymous Quiz
14%
13 square units.
27%
26 square units.
31%
15 square units.
28%
12. 5 square units.
Let A and B be 2 × 2 matrices with det(A) = 3 and det(B) = 2. Then what is the value of det(2AB)?
Anonymous Quiz
41%
24
49%
12
8%
10
1%
16
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If the determinate of the given matrix is zero then the matrix is:
Anonymous Quiz
30%
Singular matrix
21%
Non-singular matrix
24%
Invertible matrix
26%
Can not be determined
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If the diagonal elements of a certain upper triangular matrix are 4, 5 and -1. Then what is the determinate of the matrix?
Anonymous Quiz
12%
8
27%
20
18%
-8
43%
-20
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🎉🎉 መልካም ዜና ለማትሪክ ተፈታኝ ተማሪዎች
አሁኑን Join በመድረግ ተቀላቅለው አንዳለይ ተጉዙ❗️✅✅
አሁኑን Join በመድረግ ተቀላቅለው አንዳለይ ተጉዙ❗️✅✅
Which one of the following is the derivative of the function f(x) = (x³ + 1)⁶?
Anonymous Quiz
11%
18x²(x³ + 1)⁴
49%
18x²(x³ + 1)⁵
34%
6(x³ + 1)⁵
5%
6(x³ + 1)⁴
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Which rule do we use to find the derivative of any composition functions like fog(x) ?
Anonymous Quiz
24%
Product rule
20%
Quotient rule
54%
Chain rule
3%
Sum rule
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Suppose g(x) = (4 - x²)f(x³ + 1). If f(0) = 3, and f'(0) = 2, then what is g'(-1)?
Anonymous Quiz
24%
24
32%
-12
34%
12
10%
-24
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If the given rational function is odd function then which of the following is true about the graph of the function?
Anonymous Quiz
37%
The graph is symmetrical about the origin
21%
The graph is symmetrical about the x-axis
24%
The graph is symmetrical about the y-axis
18%
The graph doesn't have any symmetric
Symmetry of the graph of rational functions.
There are only two symmetry of a rational functions. These are:
1. Even Symmetry (y-axis symmetry): A rational function f(x) is symmetric about the y-axis if f(-x) = f(x) for all x in the domain of the function. This means that the graph of the function will look the same on both sides of the y-axis.
2. Odd Symmetry (origin symmetry): A rational function f(x) is symmetric about the origin if f(-x) = -f(x) for all x in the domain of the function. This means that if you rotate the graph 180 degrees around the origin, it will look the same.
Rational functions cannot have symmetry about the x-axis, because that would violate the definition of a function (each input must correspond to exactly one output).
👇👇👇👇👇👇
@maths_group11
@maths_group11
There are only two symmetry of a rational functions. These are:
1. Even Symmetry (y-axis symmetry): A rational function f(x) is symmetric about the y-axis if f(-x) = f(x) for all x in the domain of the function. This means that the graph of the function will look the same on both sides of the y-axis.
2. Odd Symmetry (origin symmetry): A rational function f(x) is symmetric about the origin if f(-x) = -f(x) for all x in the domain of the function. This means that if you rotate the graph 180 degrees around the origin, it will look the same.
Rational functions cannot have symmetry about the x-axis, because that would violate the definition of a function (each input must correspond to exactly one output).
👇👇👇👇👇👇
@maths_group11
@maths_group11
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