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Chemistry, Physics, Biology
12th
grade
Unit 3 L3 Btec Applied science NQF
50 questions
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- 1. Multiple Choice
Definition of a hypothesis
A prediction, based on scientific ideas, made as a starting point for further investigation
A prediction which states that there is no relationship between two variables or no difference among groups.
A scientific question that requires an answer
A scientific observation
- 2. Multiple Choice
Definition of a null hypothesis
A prediction which states that there is no relationship between two variables or no difference among groups.
A prediction, based on scientific ideas, made as a starting point for further investigation
A scientific observation
A scientific question that requires an answer
- 3. Multiple Choice
What is an independent variable?
The variable that may change as result of the changing independent variable. This is the variable you measure.
Variables that need to be kept constant
The variable being changed in an investigation.
The method to be followed
- 4. Multiple Choice
What is a dependent variable
A method to be followed
The variable being changed in an investigation.
Variables that need to be kept constant.
The variable that may change as result of the changing independent variable. This is the variable you measure.
- 5. Multiple Choice
What is a control variable?
The method being followed
Variables that need to be kept constant.
The variable that may change as result of the changing independent variable. This is the variable you measure.
The variable being changed in an investigation.
- 6. Multiple Choice
What does quantitative mean?
Observations made without using numbers.
Data which involves using numbers.
Recordings made of colour
Recordings made of physical changes
- 7. Multiple Choice
What does qualitative mean?
Measurements involving mass
Measurements involving volume
Data which involves using numbers.
Observations made without using numbers.
- 8. Multiple Choice
In science what does accuracy mean in terms of data?
When results are repeated
How precisely the measurement is taken.
How close the readings are to the actual values.
When results are valid
- 9. Multiple Choice
What is this formula showing?
T-Test
Standard deviation
Mean
Chi squared test
- 10. Multiple Choice
What does the formula show?
Standard deviation
t-test
chi squared
mean
- 11. Multiple Choice
What does the formula show?
t-test
mean
chi squared
standard deviation
- 12. Multiple Choice
What does this symbol mean?
divide
multiply
excellent
sum of
- 13. Multiple Choice
What does the O stand for?
optional
outlier
observed
zero
- 14. Multiple Choice
What does the E stand for?
example
endless
expected
exact
- 15. Multiple Choice
What does the S standard for?
Sample
Standard
Seven
Sign
- 16. Multiple Choice
What does the n stand for?
nine
number
none
number of terms
- 17. Multiple Choice
What is this number?
103
100
10000
1000
- 18. Multiple Choice
What does the prefix Mega mean?
million
millionth
thousand
millimeter
- 19. Multiple Choice
What does the prefix centi mean?
100th
10th
1000th
10000th
- 20. Multiple Choice
What does the prefix micro mean?
1 thousandth
1 hundredth
1 millionth
10 hundredth
- 21. Multiple Choice
Enzymes are an example of
Lipids
Carbohydrate
Protein
Nucleic Acid
- 22. Multiple ChoiceEnzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?reducing the number of productsreducing the activation energyincreasing the temperature of the cellincreasing the concentration of reactants
- 23. Multiple ChoiceEach enzyme only has 1 substrate that will fit its active site. What is this called?reusablecatalystspecificfragile
- 24. Multiple ChoiceWhat 3 letters do enzymes typically end in?-ose-ase-ese-tic
- 25. Multiple ChoiceAny substance that is acted upon by an enzyme is called a(n)?CoenzymeSubstrateVitaminPolypeptide
- 26. Multiple ChoiceIn the diagram, what is letter A?productsubstrateenzyme-substrate complexactive site
- 27. Multiple ChoiceLetter D...active siteenzymesubstrateproducts
- 28. Multiple ChoiceLetter B...active siteenzymesubstrateproducts
- 29. Multiple ChoiceLetter C...active siteenzymessubstrateproducts
- 30. Multiple ChoiceBased on the graph, what is the optimal temperature for this enzyme?15oC40oC30oC35oC
- 31. Multiple ChoiceAt high temperatures enzyme activity declines because of:DenaturationDecreased Kinetic MotionIncreased H-BondingDissociation of Ionic Compounds
- 32. Multiple ChoiceAt low temperatures enzyme activity declines because of:DenaturationDecreased Kinetic MotionIncreased H-BondingDissociation of Ionic Compounds
- 33. Multiple ChoiceWhat is the name for the mechanism of enzyme activity?Lock and keyjigsaw puzzlehammer and nailtwo hands pattern
- 34. Multiple ChoiceWhich of the following conclusions can be drawn from this graph?The optimum pH of the enzyme is 6.6.The optimum pH of the enzyme is 5.8The enzyme’s activity increases as pH increases 5.0 to 9.0The enzyme’s activity is greater around pH of 8.0 .
- 35. Multiple ChoiceEnzymes are composed of which of the following monomers?amino acidscarbohydratesnucleotidesmonosaccharides
- 36. Multiple Choice
What do we know about the enzyme's structure if the enzyme is in its optimum pH
the enzyme structure is not denatured, meaning that the active site is still in tact
the enzyme structure is not denatured, meaning that the active site is changed
the enzyme structure is denatured
- 37. Multiple Choice
What temperature do you think our enzymes will work the best at?
room temperature, 25 degrees
0 degree
50 degrees
37 degrees
- 38. Multiple ChoiceWhich of the factors does NOT affect enzymatic activity?TemperaturepHConcentrationColor
- 39. Multiple ChoiceEnzyme A digests proteins in the stomach (environment with a pH of 2). Enzyme B digests proteins in the small intestine (environment with a pH of 8). Which of the following is NOT true:Enzyme A would be denatured in the small intestine.Enzyme A works best in acidic conditions.Enzyme A can also work in the small intestine.Enzyme A helps in the hydrolysis of proteins.
- 40. Multiple ChoiceWhat would happen to the rate of reaction if more substrate added to the solution at point Cincrease reaction ratedecrease reaction rateno change in reaction rate
- 41. Multiple ChoiceWhat would happen to the rate of reaction if more enzyme added to the solution at point Cincrease reaction ratedecrease reaction rateno change in reaction rate
- 42. Multiple Choice
What is a Belt Transect?
A way of sampling a changing habitat
A way of sampling a non-changing habitat
A way of keeping up your pants
- 43. Multiple Choice
What is the best way to place a quadrat?
Place it where you like
Divide the sample area into a grid and use a random number generator to choose a square.
Throw the quadrat so it's random
Divide the sample area into a grid and choose a square.
- 44. Multiple ChoiceWhat is the pH range of enzyme A?20-3.73.70
- 45. Multiple ChoiceWhich enzyme is most efficient in a basic solution?AB
- 46. Multiple Choice
What is the optimal pH of enzyme A?
8
2
5.7-10
10
- 47. Multiple ChoiceFind the mode:
5, 0, 9, 9, 3, 0, 5, 5, 49537 - 48. Multiple ChoiceWhen finding the median, what do you do if there are two middle numbers?Add them together and divide by 2Write them both as the answerGive upPick one
- 49. Multiple ChoiceWhat is the first thing you should do before finding the median or the mode?Start crossing numbers offPut numbers in order from least to greatestList the numbers how they areLook for repeats
- 50. Multiple Choice
Anomalous results are...
crossed out
always included in the calculation of the mean (average)
excluded from the mean
included in the mean sometimes
- Answer choicesTagsAnswer choicesTags