GACE Biology Test Prep Questions and
Answers 100% Pass
Which enzyme in DNA replication is a potential source of new mutation? - ✔✔DNA
Polymer: does not match base pairs with 100% fidelity. Some level of mismatching is
present for all DNA polymerases, and this is a source of mutation in nature. Cells have
mechanisms of correcting base pair mismatches, but they do not fix all of them.
Which of the following mutations is most likely to have a dramatic effect on the
sequence of a protein? - ✔✔Insertions and Deletions cause frame shift mutations. These
mutations cause all subsequent nucleotide to be displaced by one position, and thereby
cause all the amino acids to be different than they would have been if the mutation had
not occurred.
In relation to the water cycle, which of the following statements concerning
transpiration is NOT true? - ✔✔As relative humidity increases, the rate of transpiration
increases. It is more difficult for water to evaporate into the more saturated air. As the
relative humidity decreases, the rate of transportation increases.
In relation to the water cycle, which of the following statements concerning
transpiration is true? - ✔✔as wind increase= the rate of transportation increases
Brittie Donald, All Rights Reserved © 2025 1
, as temperatures increase, the rate of transportation increases
as soil moisture decreases, the rate of transpiration decreases.
DNA replication steps - ✔✔1) Helicase- unwinds the parental double helix
2) DNA topoisomerase - upstream of helices alleviating torsional strain
3) Single-strand binding proteins (SSBP) stabilize unwound DNA, aided by DNA
gyrase.
4) Primase synthesizes a short RNA primer for DNA polymerase to bind to in the 5' to 3'
direction to start replication on each strand.
5) DNA polymerase synthesizes the leading strand in 5' to 3' direction while the lagging
strand is made discontinuously by primase making short pieces and then DNA
polymerase extending these to make Okazaki fragments.
Brittie Donald, All Rights Reserved © 2025 2
Answers 100% Pass
Which enzyme in DNA replication is a potential source of new mutation? - ✔✔DNA
Polymer: does not match base pairs with 100% fidelity. Some level of mismatching is
present for all DNA polymerases, and this is a source of mutation in nature. Cells have
mechanisms of correcting base pair mismatches, but they do not fix all of them.
Which of the following mutations is most likely to have a dramatic effect on the
sequence of a protein? - ✔✔Insertions and Deletions cause frame shift mutations. These
mutations cause all subsequent nucleotide to be displaced by one position, and thereby
cause all the amino acids to be different than they would have been if the mutation had
not occurred.
In relation to the water cycle, which of the following statements concerning
transpiration is NOT true? - ✔✔As relative humidity increases, the rate of transpiration
increases. It is more difficult for water to evaporate into the more saturated air. As the
relative humidity decreases, the rate of transportation increases.
In relation to the water cycle, which of the following statements concerning
transpiration is true? - ✔✔as wind increase= the rate of transportation increases
Brittie Donald, All Rights Reserved © 2025 1
, as temperatures increase, the rate of transportation increases
as soil moisture decreases, the rate of transpiration decreases.
DNA replication steps - ✔✔1) Helicase- unwinds the parental double helix
2) DNA topoisomerase - upstream of helices alleviating torsional strain
3) Single-strand binding proteins (SSBP) stabilize unwound DNA, aided by DNA
gyrase.
4) Primase synthesizes a short RNA primer for DNA polymerase to bind to in the 5' to 3'
direction to start replication on each strand.
5) DNA polymerase synthesizes the leading strand in 5' to 3' direction while the lagging
strand is made discontinuously by primase making short pieces and then DNA
polymerase extending these to make Okazaki fragments.
Brittie Donald, All Rights Reserved © 2025 2
