Chemistry of Life / Scientific Method

Which of the following terms applies to a lipid?

• saturated

• DNA

• enzyme

• dissacride

What effect does extreme temperature and pH have on an enzyme?

• forms ionic bonds

• forms covalent bonds

• denatures the enzyme

• increase product formation

Which of the following statements regarding carbon is false?

• Carbon has the ability to bond with up to four other atoms

• 
  Carbon has the capacity to form single and double bonds.

• 
  Carbon has the ability to form branched or unbranched arrangements

• 
  Carbon has the capacity to form polar bonds with hydrogen.

The time it takes to run a marathon depends on the amount of training the runner gets.

• time is the independent variable and training is the dependent variable

• training is the independent variable and time is the dependent variable

• marathon is the independent variable and time is the dependent variable

• 
  time is the independent variable and marathon is the dependent variable

• there is not enough information to determine which variable is which

The three particles that make up atoms are?

• protons

• neutrons

• electrons

• negatives

• isotopes

Which statement is true about valence electrons?

• 
  They are uncharged subatomic particles.

• 
  They are found in the nucleus of an atom.

• 
  They participate in forming chemical bonds.

• They are in the innermost electron shell of carbon.

Which of of the following refers to the group that transmits hereditary information

• 
  carbohydrate

• 
  lipid

• nucleic acid

• 
  protein

Use the molecular structures in Figure to answer the following: Which letter is a nucleotide?

• A

• B

• C

• D

Use the molecular structures to answer the following: Which letter is a carbohydrate?

• A

• B

• C

• D

A covalent bond is formed as the result of

• transferring electrons

• sharing electrons

• transferring protons

• sharing protons