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.

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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

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What does the order of amino acids directly affect?

• the protein made

• the nucleotide made

• the peptide bonds produced

• the carbohydrate made

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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

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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

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

• Proteins

• stores genetic information, made up of nucleotides

• Nucleic acid

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

• Carbohydrate

• Short term/quick energy

• Polymer

• Made up of smaller subunits called monomers

• Lipids

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.

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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