Question

test name: bio_fs002_u01_py26
test id: 3645054

1. use the figure below to answer the following question.

which of the following structures is circled and labeled x in the figure above?
a nucleotide
b amino acid
c nucleic acid
d dna molecule

1. the graph below shows the progress of a biochemical reaction.

what effect would an enzyme have on the reaction?
a an enzyme would increase the amount of energy at point 3.
b an enzyme would increase the amount of energy needed at point 1.
c an enzyme would decrease the energy needed to move from point 1 to point 2.
d an enzyme would cause the amount of energy at point 1 and point 3 to switch places.

Explanation:

1. In a DNA structure, the basic unit is a nucleotide which is circled in the DNA - double helix figure.
2. Enzymes are biological catalysts that lower the activation - energy (the energy needed to go from the reactant state at Point 1 to the transition state at Point 2) of a biochemical reaction.

Answer:

1. A. nucleotide
2. C. An enzyme would decrease the energy needed to move from Point 1 to Point 2.