IB Biology SL Biological Molecules

Which of the following is NOT a function of proteins

• Enzymes: speed up chemical reactions

• Energy: stored energy in cells

• Transport: movement of molecules into/out of cells

• Structure: provides shape to cells and tissues

The framework of all organic macromolecules is made of straight chains, branched chains, and rings of

• Hydrogen

• Carbon

• Oxygen

• Phosphorous

• Nitrogen

Tags

NGSS.HS-LS1-6

The most abundant molecule in most living things is

• hydrogen

• carbon

• carbon dioxide

• water

Water is polar which means that

• Both ends of the molecule have a positive charge

• Both ends of the molecule have a negative charge

• One end of the molecule has a positive charge, while the other end has a negative charge

• The molecule is neutral

Tags

NGSS.HS-PS2-6

Which of the following represents the correct ranking of terms from smallest to largest

• Polymer→monomer→carbon atom

• Carbon atom→polymer→monomer

• Monomer→carbon atom→polymer

• Carbon atom→monomer→polymer

Protein's function is

• makes membranes

• controls chemical reactions

• provides energy

• contains genetic material

Which of the following is NOT considered to be one of the large groups of biomolecules?

• Carbohydrates

• Enzymes

• Lipids

• Nucleic Acids

• Proteins

Which of these inorganic ions is found in Hemoglobin and attracted to oxygen in the bloodstream?

• Magnesium

• Iron

• Nitrate

• Phosphate

What type of bond joins Hydrogen atoms to Oxygen atoms within a molecule of water

• Covalent

• Ionic

• Hydrogen

• Disulphide

The Benedicts test shows an orange color when a simple sugar is present. Why would sucrose not show a positive (orange) result with the Benedict's test?

• It's not any type of sugar

• It is a polysaccharide

• It's not a simple sugar

• It's an enzyme