4-19

Which statement explains the effect of an inhibitor on an enzyme?

• A substrate will be able to bond with the enzyme.

• The enzyme will likely be attacked by immune cells.

• The enzyme will be unable to produce more enzymes.

• A substrate will be unable to attach to the enzyme.

A student is looking for evidence that spindle fibers are separating the chromosomes to ensure that each new nucleus has one copy of each chromosome. Which diagram is the student looking for?

• Cell 1

• Cell 2

• Cell 3

• Cell 4

Which two processes does this diagram most directly model?

• Energy conversions and synthesis of new molecules

• Synthesis of new molecules and homeostasis

• Transport of molecules and energy conversions

• Homeostasis and transport of molecules

Which statement describes the mutation in the diagram?

• A silent mutation results in the insertion of a different amino acid.

• A substitution occurs with the adenine base.

• A deletion of cytosine base occurs

• A base inserted into one strand of the DNA

Which statement describes this model of DNA?

• The model is inaccurate because the base pairs are incorrect.

• The model is accurate because it contains correctly paired bases.

• The model is accurate because it shows each base splitting to form a double helix.

• The model is inaccurate because some typical bases in

  DNA are missing.