IB Biology Topic 1 Review

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-PS1-4

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

What type of bond connects glycerol to fatty acids?

• glycosidic

• lipid

• ester

• peptide

Which of the following best describes primary succession?

• Volcano wipes out ecosystem that gradually grows back from ash covered soil

• Volcano creates a new island of rock that must break down to form an ecosystem

• Forest fire burns down forest that must bounce back over time

• Tornado destroys a crop that must slowly grow back over time.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

How does energy enter an ecosystem?

• sunlight

• soil

• animals

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-4

NGSS.HS-LS2-5