There are twenty questions in this quiz. Select the correct answer from the given choices.
Quiz Summary
0 of 20 Questions completed
Questions:
Information
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading…
You must sign in or sign up to start the quiz.
You must first complete the following:
Results
Results
0 of 20 Questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 point(s), (0)
Earned Point(s): 0 of 0, (0)
0 Essay(s) Pending (Possible Point(s): 0)
| Average score |
|
| Your score |
|
Categories
- Not categorized 0%
-
Unfortunately, you have not scored the minimum marks required to pass the quiz. You may review the explanations provided below by clicking on the “View Questions” button before taking the quiz again. You need to score a minimum of 50% to pass, and minimum of 70% to get a Certificate of Completion.
-
Congratulations!!! You have passed the Quiz. To get a Certificate of Completion, you need to score a minimum of 70%. You may review the explanations provided below by clicking on the “View Questions” button before taking the quiz again. The more you review and practice, the better you will get at it.
-
Congratulations!!! You have passed the Quiz with a good score. To get a Certificate of Completion, you need to score a minimum of 70%. You may review the explanations provided below by clicking on the “View Questions” button before taking the quiz again. The more you review and practice, the better you will get at it. We have raised the bar because we want you to SUCCEED with brilliant scores.
-
Congratulations!!! You have passed the Quiz with a score >= 70% and are eligible to get a Certificate of Completion.
| Pos. | Name | Entered on | Points | Result |
|---|---|---|---|---|
| Table is loading | ||||
| No data available | ||||
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- Current
- Review
- Answered
- Correct
- Incorrect
-
Question 1 of 20
1. Question
1 point(s)The graph shows how the rate of an enzyme-controlled reaction changes with temperature.
What is happening within the temperature range marked X?CorrectIncorrect -
Question 2 of 20
2. Question
1 point(s)A protease is added to a suspension of egg protein in a test-tube and kept at 37 °C.
After 8 minutes, the protein changes from cloudy to transparent.
Which product, or products, will now be present in the test-tube?CorrectIncorrect -
Question 3 of 20
3. Question
1 point(s)What are enzymes made of?
CorrectIncorrect -
Question 4 of 20
4. Question
1 point(s)At which temperature do most enzymes from the human body become completely denatured?
CorrectIncorrect -
Question 5 of 20
5. Question
1 point(s)The graph shows pH changes in the mouth after eating.
Why is it a good idea to brush teeth after eating?CorrectIncorrect -
Question 6 of 20
6. Question
1 point(s)Equal quantities of a protein-digesting enzyme were added to 5 cm3 of protein solutions of different pH. Each tube was kept at 37 °C.
The amount of amino acid in each tube was measured after 3 minutes. The results are shown in the table.pH amount of amino acid
/arbitrary units1 10 2 9 3 7 4 2 5 1 6 1 7 1 8 0 At which pH was the enzyme most active?
CorrectIncorrect -
Question 7 of 20
7. Question
1 point(s)Four test-tubes were set up as shown in the diagram.
In which tube is the starch digested most quickly?
CorrectIncorrect -
Question 8 of 20
8. Question
1 point(s)The activity of lipase is measured in four parts of the gut.
Which part has the most lipase activity?CorrectIncorrect -
Question 9 of 20
9. Question
1 point(s)The table shows the colour of a biuret solution before and after a food test was carried out.
colour of solution before food test colour of solution after food test blue lilac / purple Which nutrient was present?
CorrectIncorrect -
Question 10 of 20
10. Question
1 point(s)The diagram shows some organs of the digestive system.
Where is amylase made?CorrectIncorrect -
Question 11 of 20
11. Question
1 point(s)A human cell contains a length of DNA that carries the code for making which substance?
CorrectIncorrect -
Question 12 of 20
12. Question
1 point(s)A student set up a test-tube containing starch, water and amylase.
How could the student test whether the amylase had digested all the starch?CorrectIncorrect -
Question 13 of 20
13. Question
1 point(s)The temperature of an enzyme-controlled reaction is increased by 10 °C.
How does this affect the rate of reaction?CorrectIncorrect -
Question 14 of 20
14. Question
1 point(s)In an experiment, the effect of temperature on the action of amylase is investigated.
Six different test-tubes are set up, each containing a mixture of amylase and starch solution.
Which condition should not be kept the same in each of the six test-tubes?CorrectIncorrect -
Question 15 of 20
15. Question
1 point(s)The diagram shows an experiment kept at room temperature.
What is present in the water surrounding the membrane after 45 minutes?CorrectIncorrect -
Question 16 of 20
16. Question
1 point(s)The diagram shows the lock and key model of enzyme action.
Which is the enzyme and which is the substrate?enzyme substrate A 1 2 B 1 3 C 3 1 D 3 2 CorrectIncorrect -
Question 17 of 20
17. Question
1 point(s)The table shows the temperature and pH at which four different enzymes are most active.
Which enzyme is a protease from the stomach?optimum temperature
/ °Coptimum pH A 25 10 B 37 7 C 40 2 D 50 5 CorrectIncorrect -
Question 18 of 20
18. Question
1 point(s)The data show the concentrations of sugar and starch in an onion.
total sugar including reducing sugar
/ g per 100gstarch
/ g per 100g3.7 0 The onion is tested with Benedict’s solution and iodine solution.
Which set of results is correct?Benedict’s
solutioniodine
solutionA blue blue-black B blue brown C brick red blue-black D brick red brown CorrectIncorrect -
Question 19 of 20
19. Question
1 point(s)The small intestines of cows are similar in general structure and function to the small intestines of humans.
A disease in cows reduces the number of villi in their small intestines.
The cows lose weight and become weak.
What explains this?CorrectIncorrect -
Question 20 of 20
20. Question
1 point(s)The diagram shows an experiment on the digestion of the protein in egg albumen by protease.
The protease was taken from a human stomach.
In which test-tube will the protein be digested most quickly?
CorrectIncorrect
