IB Biology Topic 1

Which of the following carbohydrates are disaccharides? One, some or all answers may be correct.

• maltose

• lactose

• starch

• sucrose

Which type of reaction is used to produce maltose?

• carboxylation

• esterification

• hydrolysis

• condensation

What is the name of the bond that is used to join monosaccharides together?

• ester bond

• peptide bond

• hydrogen bond

• glycosidic bond

The monosaccharides glucose and fructose have the same molecular formula (C₆H₁₂O₆).

They can join to form the disaccharide sucrose.

What is the molecular formula of sucrose?

• C₁₂H₂₄O₁₂

• C₁₂H₂₃O₁₀

• C₁₂H₂₂O₁₁

• C₁₂H₂₀O₁₀

Tags

NGSS.HS-LS1-6

What type of reaction is used to breakdown a polypeptide (protein) into amino acids?

Which of the following could be a glycosidic bond?

• C-O

• C-N

• C-H

• C=C

Tags

NGSS.HS-LS1-6

Which of the following properties allow starch to be a good energy storage carbohydrate? One, some or all answers may be correct.

• it is soluble so there is no osmotic effect

• it is coiled so a lot can be fit into a small space

• it is a large molecule so cannot easily leave the cell

• it is branched so it is easier to remove glucose molecules

Which molecule is shown in the diagram?

• cellulose

• amylose

• amylopectin

• polypeptide

Cis-unsaturated fatty acids are healthier than trans-unsaturated fatty acids. Which of the following properties of cis-unsaturated fatty acids contribute to this? I. they have less bends in their chain II. there are weaker attractive forces between their chains III. they are more likely to form liquids (oils) than solids

• I and II only

• I and III only

• II and III only

• I, II and III

Which of the following are differences between a triglyceride and a phospholipid?

• I and II only

• I and III only

• II and III only

• I, II and III