The Chemistry of Life

Chapter 2: Chemistry of Life

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Multiple Choice

The nucleus of an atom has:

• Protons and electrons

• Protons and Neutrons

• Only protons

• Electrons

Multiple Choice

A compound has:

• Different elements

• Same elements

• None of the above

• All of the above

Multiple Choice

Water is a ________ molecule

• Nonpolar

• Polar

• hydrogen

• covalent

Multiple Choice

Water is a polar molecule. This is because

• Electrons are floating around with no purpose

• Electrons is being equally shared

• Electrons is more concentrated towards the 2 hydrogens

• Electrons is more concentrated towards the oxygen

Multiple Select

Select ALL the properties of water

• High specific heat

• Adhesion

• Cohesion

• Hydrogen bonds

Multiple Choice

Carbohydrates is a

• Monomer

• Polymer

• salt

• None of the above

Multiple Choice

What is the monomer of carbohydrates?

• Polysaccharide

• Monosaccharide

• Monomer

• Polymer

Multiple Choice

What is the monomer of Lipids?

• Lipids

• Fatty acids

• None of the above

• Fats

Multiple Choice

What is the monomer of proteins?

• polymer

• Proteins

• Amino acids

• monomer

Multiple Choice

What is the monomer of nucleic acids?

• amino acids

• nucleotides

• monosaccarides

• monomer

Multiple Select

Select ALL carbon based molecules

• Carbohydrates

• Nucleic Acid

• Proteins

• Lipids

Multiple Choice

Enzymes are ___________

• Lipids

• proteins

• carbohydrates

• nucleic acid

Multiple Choice

A catalyst ____________

• speeds up a chemical reaction

• slows down a chemical reaction

• serves no purpose in a chemical reaction

• None of the abpve

Multiple Choice

True or False

Enzymes are catalyst

• True

• False

Multiple Choice

Enzymes

• Decrease the activation energy (energy needed for the reaction to occur)

• Increase the activation energy (energy needed for the reaction to occur)

• has no effect on the activation energy (energy needed for the reaction to occur)

• None of the above

Multiple Select

What conditions affect a chemical reaction?

• Concentration(amount) of enzymes

• PH

• Temperature

• Concentration(amount) of substrate

Multiple Choice

Substrates bind to the _____ _____ found on an enzyme

• enzyme

• active site

• products

• reactants

Multiple Select

Select ALL that is true about enzymes

• Enzymes decrease the activation energy(energy required for the reaction to occur)

• Enzymes are proteins

• Enzymes are catalysts that helps to speed up a chemical reaction

• Enzymes increase the reaction rate (speed of a chemical reaction)