MCQ-2: Biological Molecules
There are twenty questions in this quiz. Select the correct answer from the given choices.
0 of 16 Questions completed
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:
0 of 16 Questions answered correctly
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)
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.
|Table is loading|
|No data available|
Question 1 of 16
1. Question1 point(s)
The diagram shows two food molecules before and after they have been digested by enzymes.
What identifies the products of fat digestion?CorrectIncorrect
Question 2 of 16
2. Question1 point(s)
Four foods were tested for each of the following nutrients:
- fat (using ethanol);
- protein (using the biuret test);
- reducing sugar (using Benedict’s solution),
Which food contains protein and fat?
colour of result of food test purple / lilac brick-red / orange milky-white A ✓ x ✓ B ✓ x x C x ✓ ✓ D x ✓ x
✓= nutrient present
x = nutrient absentCorrectIncorrect
Question 3 of 16
3. Question1 point(s)
Which simple molecules are the basic units of protein?CorrectIncorrect
Question 4 of 16
4. Question1 point(s)
Which substance catalyses the breakdown of fats to fatty acids and glycerol?CorrectIncorrect
Question 5 of 16
5. Question1 point(s)
Commercial fishermen use ice to store the fish that they catch.
How does the ice keep the fish fresh?CorrectIncorrect
Question 6 of 16
6. Question1 point(s)
The roots of plants take up nitrates from the soil.
What are the nitrates used to make?CorrectIncorrect
Question 7 of 16
7. Question1 point(s)
An experiment is set up to investigate gas exchange in aquatic plants.
The hydrogencarbonate indicator solution is orange at the start.
Which colour is it after three hours?CorrectIncorrect
Question 8 of 16
8. Question1 point(s)
The diagram shows the structure of part of a DNA molecule.
What does X represent?CorrectIncorrect
Question 9 of 16
9. Question1 point(s)
What is the colour change shown by Benedict’s solution when heated with a reducing sugar?CorrectIncorrect
Question 10 of 16
10. Question1 point(s)
Two pieces of an aquatic plant were placed into two different test-tubes, P and Q.
Each test-tube contained hydrogencarbonate indicator and was sealed and kept at 20 °C.
Test-tube P was kept in the light and test-tube Q was kept in the dark.
The table shows the effect of carbon dioxide on the colour of the hydrogencarbonate indicator.
dark red orange
What would the colour of the indicator be after 12 hours?
P Q A dark red orange B dark red dark red C orange dark red D orange orangeCorrectIncorrect
Question 11 of 16
11. Question1 point(s)
The data show the concentrations of sugar and starch in an onion.
total sugar including reducing sugar
/ g per 100g
/ g per 100g
The onion is tested with Benedict’s solution and iodine solution.
Which set of results is correct?
A blue blue-black B blue brown C brick red blue-black D brick red brownCorrectIncorrect
Question 12 of 16
12. Question1 point(s)
Which statement about the structure of DNA is correct?CorrectIncorrect
Question 13 of 16
13. Question1 point(s)
The base sequence of part of one strand of a DNA molecule is shown.
What is the base sequence of the other strand?CorrectIncorrect
Question 14 of 16
14. Question1 point(s)
Which processes depend on the fact that water is a solvent?
from the spongy
in blood plasma
movement of water
loss of sweat from
the skin surface
A ✓ ✓ ✓ ✓ B ✓ ✓ ✓ x C ✓ x x ✓ D x ✓ ✓ xCorrectIncorrect
Question 15 of 16
15. Question1 point(s)
Which identifies the chemical elements found in proteins?
carbon hydrogen oxygen nitrogen A ✓ ✓ ✓ ✓ B ✓ ✓ ✓ x C ✓ x ✓ x D x ✓ x ✓
✓ = present
x = absentCorrectIncorrect
Question 16 of 16
16. Question1 point(s)
A student carries out a test to see whether the solution in a test-tube contains protein.
Which row shows the correct food test and a positive result?
name of test colour seen with a
A Benedict’s test blue-black B Benedict’s test purple C biuret test blue-black D biuret test purpleCorrectIncorrect