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DNA Structure and Replication Flashcards | StudBud
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DNA Structure and Replication
DNA Structure and Replication
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#College prep biology
Flashcards
25 cards
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Practice quiz
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Questions
25
Answers
1
After DNA replication, each daughter cells contains _________________.
One old and one newly synthesized DNA strand.
Two new copies
Two old copies
2
How many amino acids does this DNA fragment encode for?5'-ATGCGCAATCGATCAGGCTAGTCAC-3'
8 amino acids
9 amino acids
This fragment does not code for any proteins.
7 amino acids
3
The DNA double strand forms a ___________________.
double helix
beta helix
Triple helix
staircase helix
4
Nucleotide(s) present in DNA
Adenine, cytosine, guanine, and uracil.
Cytosine, adenine, and thymine.
Guanine, adenine, thymine, cytosine, and uracil.
Guanine, adenine, thymine, and cytosine.
5
DNA strands are held together by _______________.
sugar molecules
Hydrogen bonds
covalent bonds
water molecules
6
The anticodon for methionine (ATG) is ___________?
5-CAT-3'
5-TAC-3'
5-UAG-3'
5-CAU-3'
7
A nitrogen base found in DNA and RNA. It pairs with thymine in DNA and with uracil in RNA.
Adenine
Cytosine
Thymine
Guanine
8
DNA is found in all living organisms.
false
true
9
DNA replication structure is known as _____________?
DNA complementary strand.
DNA replication fork or bubble.
DNA double helix.
DNA polymerase chain reactions.
10
Write the complementary strand 5'-AACCGTCGA-3'
5'-AACCGTCGA-3'
5'-TTGGCAGCT-3'
5'-AGCTGCCAA-3'
5'-TCGACGGTT-3'
11
Transcribe this DNA fragment to RNA: 5'-ATGCTCGAA-3'
5'-TTCGAGCAT-3'
5'-AUGCUCGAA-3'
5'-UUCGAGCATU-3'
5'-ATGCTCGAA-3'
12
The new DNA strand formed after DNA replication is an exact copy of its parent strand.
I do not know
False
This is to difficult
True
13
The codon that signals the start of a protein
AUG
ATG
AAU
ACG
14
A nitrogen base found in both DNA and RNA; pairs with only with cytosine.
Cytosine
Adenine
Thymine
Guanine
15
DNA replication takes place in which phase of the cell cycle?
G1 phase
S phase
G1 and G2 phases
Mitosis phase
16
The lagging strand is ______________________.
Synthesize discontinuously.
The leading strand is the only one that is replicated.
Synthesize continuously.
Is synthesized after the lagging strand is synthesized.
17
The leading strand is ______________________.
Synthesize continuously.
The leading strand is the only one that is replicated.
Synthesize discontinuously.
Is synthesized after the lagging strand is synthesized.
18
DNA polymerase III _________________?
Separates the DNA double helix.
Adds nucleotides to the growing strand, 5'-3'.
Adds a short fragment of RNA.
Keeps the DNA strand from forming hydrogen bonds.
19
DNA primase
Adds a short fragment of RNA (RNA primer).
Keeps the DNA strand from forming hydrogen bonds.
Adds nucleotides to the growing strand, 5'-3'.
Separates the DNA double helix.
20
DNA polymerase adds nucleotides to which end of the DNA strand?
3'-5'
to either end (5'-3' or 3'-5')
5'-3'
to both ends simultaneously
21
Single strand binding proteins (SSBp) _________________?
Keeps the DNA strand from forming hydrogen bonds.
Separates the DNA double helix.
Adds a short fragment of RNA.
Adds nucleotides to the growing strand, 5'-3'.
22
DNA helicase
Separates the DNA double helix.
Keeps the DNA strand from forming hydrogen bonds.
Adds a short fragment of RNA (RNA primer).
Adds nucleotides to the growing strand, 5'-3'.
23
DNA nucleotides consist of ____________?
Nitrogenous base, phosphate group, and an amino group.
DNA polymers
Nitrogenous base, phosphate group, and a sugar.
Nitrogenous base, hydrogen bonds, and a phosphate group.
24
The process of making identical copies of DNA before cell division.
Replication origin
leading strand
Replication fork
DNA replication
25
What enzyme joins Okazaki fragments in the lagging strand?
DNA helicase
DNA polymerase III
RNA polymerase
DNA ligase
