Amutation in a gene causes an alteration in the structure of helicase. which of the following would you expect as a result of this mutation?
a. the dna molecule will supercoil.
b. no replication fork will be formed.
c. replication will occur via rna polymerase alone.
d. no proofreading of the replicated strands will occur.

the answer is b.) hydrogen bonds between bases.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.