Phospholipids and Inorganic Ions in Biology

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What type of molecules are amino acids considered to be?

Carbohydrates

Lipids

Proteins (correct)

Nucleic acids

Which part of an amino acid is responsible for its distinctive properties?

R group (correct)

Amino group (NH2)

Carboxylic acid group

Hydrogen ion concentration

How are amino acids joined together in proteins?

Peptide bonds (correct)

Hydrogen bonds

Glycosidic bonds

Phosphodiester bonds

Which component of phospholipids is attracted to water?

Phosphate heads Signup and view all the answers

Iron ions are a component of which important molecule in red blood cells?

Haemoglobin Signup and view all the answers

What do hydrogen ions determine in substances like blood?

$pH$ Signup and view all the answers

Which of the following statements about proteins is correct?

Proteins are polymers of amino acids linked by peptide bonds. Signup and view all the answers

Which of the following is NOT a function of proteins in living organisms?

Storage of genetic information Signup and view all the answers

Which of the following is a primary structural level of a protein?

Sequence of amino acids Signup and view all the answers

What is the role of phospholipids in biological membranes?

They form the hydrophobic interior of the membrane. Signup and view all the answers

Which of the following inorganic ions is NOT required for biological processes in living organisms?

Lead ions (Pb2+) Signup and view all the answers

What is the primary function of macromolecules in living organisms?

Carry out diverse structural and functional roles Signup and view all the answers

What type of reaction joins monomers by chemical bonds and involves the elimination of a water molecule?

Condensation reaction Signup and view all the answers

Which type of saccharide can join together to form disaccharides and polysaccharides?

Monosaccharides Signup and view all the answers

What is the main substrate for respiration and contains six carbon atoms in each molecule?

Glucose Signup and view all the answers

Which type of molecule consists only of carbon, hydrogen, and oxygen, and forms long chains of sugar units called saccharides?

Carbohydrates Signup and view all the answers

Which type of reaction involves adding water to break a chemical bond between two molecules?

Hydrolysis reaction Signup and view all the answers

What is the process called when monomers are joined together to form polymers?