IB Diploma Programme (DP) - SL & HL · Biology

B1.1 Carbohydrates and lipids (Molecules): Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on B1.1 Carbohydrates and lipids (Molecules).

10 questions25 marksFree, no account

Question 1

1 mark

Which components are required to form one triglyceride molecule through condensation reactions?

Question 2

1 mark

What is a characteristic difference between cis-unsaturated and trans-unsaturated fatty acids?

Question 3

1 mark

An individual has a body mass of \(75\text{ kg}\) and a height of \(1.8\text{ m}\). Calculate their Body Mass Index (BMI) using the formula \(BMI = \frac{\text{mass}}{\text{height}^2}\) and identify their weight category.

Question 4

1 mark

What is the primary role of triglycerides in animal cells?

Question 5

1 mark

Phospholipids are described as amphipathic molecules. Which part of the phospholipid molecule is responsible for its hydrophobic properties?

Question 6

2 marks

Identify the characteristic chemical feature that distinguishes an unsaturated fatty acid from a saturated fatty acid.

Write your answer out first, then check it against the worked solution.

Question 7

3 marks

Compare lipids and carbohydrates as energy storage molecules in terms of the amount of energy released per gram.

Write your answer out first, then check it against the worked solution.

Question 8

6 marks

Explain how the highly branched structure of glycogen in liver cells relates to its function as a readily available energy source during periods of high metabolic demand.

Write your answer out first, then check it against the worked solution.

Question 9

4 marks

Carbohydrates are essential organic compounds.
a) Describe the condensation reaction that occurs when two molecules of glucose join together.
b) Identify the specific type of covalent bond formed during this process.
c) State the name of the resulting disaccharide and the small molecule produced as a byproduct.

Write your answer out first, then check it against the worked solution.

Question 10

5 marks

Triglycerides and phospholipids are both types of lipids found in living organisms.
a) Compare the molecular structure of a triglyceride with that of a phospholipid.
b) Explain how the difference in their structures accounts for their distinct biological roles in energy storage versus membrane formation.

Write your answer out first, then check it against the worked solution.

* The content provided by thinka is generated by AI and may not always be accurate or up-to-date. Please use it as a supplementary resource and verify with official materials.

You've seen the model answer. Now get yours marked.

This page can show you how a good answer looks. It cannot tell you what your answer was missing. thinka marks your written work against the real mark scheme in about 15 seconds.

Get My Answers Marked Back to the notes

Want more questions like these? Get a fresh set on this topic, marked as you go.