Biology Macromolecules and Enzymes quiz

How does the structure of a nucleic acid compare to the structure of a

protein?

• Both are smaller subunits; nucleic acids make up nucleotides and

  proteins make up amino acids.

• Both are larger compounds; nucleic acids are made of nucleotides

  while proteins are made of amino acids.

• Nucleic acids are larger compounds made of amino acids, while

  proteins are smaller subunits that make up amino acids.

• Nucleic acids are smaller subunits that make of ribosomes, while

  proteins are larger compounds made of amino acids.

Which best explains enzyme specificity?

• An enzyme reacts best at a certain pH.

• An enzyme reacts best at a certain temperature.

• An enzyme is able to react with only one substrate.

• An enzyme is able to react with many different substrates.

Which most directly determines the sequence of amino acids in a

protein?

• the DNA in the nucleus of the cell

• the amino acids found in the cytoplasm

• the type of cell in which the protein is made

• the region of the cell in which the protein is made

What does the order of amino acids directly affect?

• the protein made

• the nucleotide made

• the peptide bonds produced

• the carbohydrate made

All living things are similar because

• they have one cell with the same organelles

• they all have DNA which stores genetic information for making proteins

• they can use the same proteins and amino acids to carry out life processes

• they contain the same types of tissues to carry out the functions of life

Enzymes can be inhibited (stop working)

• by too much minerals in water

• by different types of fabric

• by temperature and pH

• by different fragrances

Match the following

• Made up of smaller subunits called monomers

• Proteins

• stores genetic information, made up of nucleotides

• Carbohydrate

• Short term/quick energy

• Lipids

• many functions, including speeding up reactions, protection from diseases

• Polymer

• long term energy and storage in living organisms, also insulation

• Nucleic acid

What is the relationship between DNA and proteins in all organisms?

• The nucleotide sequences contain the instructions used to synthesize

  amino acids.

• The amino acid sequences contain the instructions used to synthesize

  DNA and RNA.

• The helical shape of DNA resembles the helical shape of some

  proteins that are found in all cells.

• Cells are the same in all organisms, therefore there is no significant

  relationship between DNA and amino acids.

What woiuld happen if the active site for an enzyme gets blocked by poison?

• The enzyme would continue to work

• The enzyme would take longer to perform its normal functions

• The enzyme would be useless because its acvtive site was blocked

• the enzyme would transfer its active site to another location