BIO 1 DNA Structure And Replication Question Preview (ID: 26637)


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The basic unit (monomer) of nucleic acids is the
a) nitrogenous base.
b) nucleosome.
c) nucleotide.
d) nucleolus.

In DNA, cytosine always pairs with
a) another cytosine.
b) adenine.
c) guanine.
d) thymine.

What type of bonds hold the bases of DNA together?
a) covalent bonds
b) ionic bonds
c) hydrogen bonds
d) dermabonds

In eukaryotic cells, DNA is tightly coiled around proteins called
a) histones.
b) histomines.
c) keratin.
d) collagen.

The DNA and protein tightly packed together in a eukaryotic cell's nucleus is called
a) chromophore.
b) chromatin.
c) kodachrome.
d) nucleochrome.

During DNA replication the enzyme that joins the new nucleotides together is called
a) RNA polymerase.
b) helicase.
c) nuclease.
d) DNA polymerase.

During DNA replicaton adenine will always base pair with
a) cytosine.
b) thymine.
c) another adenine.
d) guanine.

During replication DNA polymerase
a) unwinds the double helix.
b) loosens the DNA from the histone proteins.
c) proofreads the new strand of DNA checking for mistakes.
d) rewinds the DNA around the histone proteins.

Copying of DNA during replication begins at
a) the replication forks.
b) the 3'end of the strand.
c) the 5' end of the strand.
d) the base sequence AATGCCA.

At the end of DNA replication,
a) two completely new strands are formed. The old DNA has been degraded.
b) one old double stranded DNA and one new double stranded DNA result.
c) two DNA molecules each with one strand old and one strand new.
d) RNA has been made.

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