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BIO 1 DNA Structure And Replication
Test Description: BIO 1
Instructions: Answer all questions to get your test result.
1) The basic unit (monomer) of nucleic acids is the
A
nucleolus.
B
nucleotide.
C
nitrogenous base.
D
nucleosome.
2) In DNA, cytosine always pairs with
A
another cytosine.
B
guanine.
C
adenine.
D
thymine.
3) What type of bonds hold the bases of DNA together?
A
ionic bonds
B
hydrogen bonds
C
covalent bonds
D
dermabonds
4) In eukaryotic cells, DNA is tightly coiled around proteins called
A
keratin.
B
histomines.
C
histones.
D
collagen.
5) The DNA and protein tightly packed together in a eukaryotic cell's nucleus is called
A
nucleochrome.
B
chromophore.
C
chromatin.
D
kodachrome.
6) During DNA replication the enzyme that joins the new nucleotides together is called
A
nuclease.
B
RNA polymerase.
C
helicase.
D
DNA polymerase.
7) During DNA replicaton adenine will always base pair with
A
thymine.
B
another adenine.
C
guanine.
D
cytosine.
8) During replication DNA polymerase
A
loosens the DNA from the histone proteins.
B
unwinds the double helix.
C
rewinds the DNA around the histone proteins.
D
proofreads the new strand of DNA checking for mistakes.
9) Copying of DNA during replication begins at
A
the replication forks.
B
the 5' end of the strand.
C
the 3'end of the strand.
D
the base sequence AATGCCA.
10) At the end of DNA replication,
A
two DNA molecules each with one strand old and one strand new.
B
one old double stranded DNA and one new double stranded DNA result.
C
RNA has been made.
D
two completely new strands are formed. The old DNA has been degraded.
*select an answer for all questions
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