What is the correct relationship among DNA, genes and
chromosomes?
A)A gene contains many chromosomes which are
composed of proteins
B)A chromosome contains many genes which are
composed of DNA
C)A gene is composed of proteins which are found on the
chromosomes
D)A chromosome contains many genes which are
composed of proteins
What is the correct relationship among DNA, genes and
chromosomes?
A)A gene contains many chromosomes which are
composed of proteins
B)A chromosome contains many genes which are
composed of DNA
C)A gene is composed of proteins which are found on the
chromosomes
D)A chromosome contains many genes which are
composed of proteins
DNA and RNA are polymers of…
A. fatty acids
B. nucleotides
C. monoglycerides
D. amino acids
DNA and RNA are polymers of…
A. fatty acids
B. nucleotides
C. monoglycerides
D. amino acids
What are the parts of a nucleotide?
a. a phosphate, five-carbon sugar, and a nitrogen base
b. a group of linked amino acids
c. one half of a DNA molecule
d. a protein, a sugar, and a phosphate
e. a phosphate, a six-carbon sugar, and a nitrogen base
What are the parts of a nucleotide?
a. a phosphate, five-carbon sugar, and a nitrogen base
b. a group of linked amino acids
c. one half of a DNA molecule
d. a protein, a sugar, and a phosphate
e. a phosphate, a six-carbon sugar, and a nitrogen base
Which parts of a nucleotide make-up the backbone of a
nucleic acid molecule?
A) phosphate
B) sugar
C) nitrogen base
D) A and B
E) B and C
Which parts of a nucleotide make-up the backbone of a
nucleic acid molecule?
A) phosphate
B) sugar
C) nitrogen base
D) A and B
E) B and C
In double stranded DNA, the weak bonds between
complementary nitrogen bases involve:
a. RNA
b. DNA
c. hydrogen bonds
d. five-carbon sugars
e. sulfur
In double stranded DNA, the weak bonds between
complementary nitrogen bases involve:
a. RNA
b. DNA
c. hydrogen bonds
d. five-carbon sugars
e. sulfur
Which of the following is NOT one of the nitrogen bases
in a DNA molecule?
a. adenine
b. cytosine
c. uracil
d. thymine
e. guanine
Which of the following is NOT one of the nitrogen bases
in a DNA molecule?
a. adenine
b. cytosine
c. uracil
d. thymine
e. guanine
Cytosine will form a base pair only with:
a. cytosine
b. adenine
c. thymine
d. uracil
e. guanine
Cytosine will form a base pair only with:
a. cytosine
b. adenine
c. thymine
d. uracil
e. guanine
What is the base sequence of the DNA strand that would
be complementary to the following single-stranded DNA
molecule?
GGATCTGATCCAGTCA
||||||||||||||||
_________________________________
What is the base sequence of the DNA strand that would
be complementary to the following single-stranded DNA
molecule?
GGATCTGATCCAGTCA
||||||||||||||||
CCTAGACTAGGTCAGT
Identify components
1 and 2 of the
molecule to the
right.
Identify components
1 and 2 of the
molecule to the
right.
1 = a phosphate
2 = deoxyribose sugar  You know it’s DNA since it is double stranded!
In this DNA, which of
the following can
3 and 4 be?
a) A and G
b) U and A
c) C and C
d) A and T
In this DNA, which of
the following can
3 and 4 be?
a) A and G
b) U and A
c) C and C
d) A and T
In this DNA,
3 and 4 are held
Together by
a) Barry Bonds
b) Covalent Bonds
c) Peptide bonds
d) Hydrogen bonds
In this DNA,
3 and 4 are held
Together by
a) Barry Bonds
b) Covalent Bonds
c) Peptide bonds
d) Hydrogen bonds
DNA replication…
A. occurs by the addition of nucleotides to the end of the
DNA molecule.
B. results in the formation of four new DNA strands.
C. produces two brand new DNA strands that do not
resemble the original strand
D. uses each strand of a DNA molecule as a template for
the creation of a new strand.
E. begins when two DNA molecules join together to
exchange segments.
DNA replication…
A. occurs by the addition of nucleotides to the end of the
DNA molecule.
B. results in the formation of four new DNA strands.
C. produces two brand new DNA strands that do not
resemble the original strand
D. uses each strand of a DNA molecule as a template for
the creation of a new strand.
E. begins when two DNA molecules join together to
exchange segments.
Describe what is
happening in each
step of DNA
replication
(figure to right)
Describe what is
happening in each
step of
DNA replication
(figure to right)
1: one parent double stranded DNA
2: DNA unzips and unwinds
3: Complementary nitrogen bases match up forming a
new strand of DNA using an old strand as a template
4: Two daughter double helices; each ½ old and ½ new
The enzyme ________ unzips and unwinds the DNA
molecule.
A) DNA polymerase
B) helicase
C) primase
D) DNA ligase
E) unzipase
The enzyme ________ unzips and unwinds the DNA
molecule.
A) DNA polymerase
B) helicase
C) primase
D) DNA ligase
E) unzipase
The enzyme ________ assembles a new strand of DNA
according to the base pairing rules and using an old
strand of DNA as the template..
A) DNA polymerase
B) helicase
C) primase
D) DNA ligase
E) unzipase
The enzyme ________ assembles a new strand of DNA
according to the base pairing rules and using an old
strand of DNA as the template..
A) DNA polymerase
B) helicase
C) primase
D) DNA ligase
E) unzipase
A double-stranded DNA is 21% cytosine.
What is the percent of thymine in that DNA?
A double-stranded DNA is 21% cytosine.
What is the percent of thymine in that DNA?
29 % thymine
A double-stranded DNA is 38% adenine.
What is the percent of cytosine in that DNA?
A double-stranded DNA is 38% adenine.
What is the percent of cytosine in that DNA?
12 % cytosine
In the semi-conservative DNA replication, daughter DNA
molecules consist of:
a. one-half of the molecules with two parental strands
and one-half of the molecules with two new strands
b. all molecules with interspersed parental and new
segments
c. all molecules with one parental and one new strand
d. all molecules with two new strands
In the semi-conservative DNA replication, daughter DNA
molecules consist of:
a. one-half of the molecules with two parental strands
and one-half of the molecules with two new strands
b. all molecules with interspersed parental and new
segments
c. all molecules with one parental and one new strand
d. all molecules with two new strands
Two differences between DNA and RNA are that only the
RNA contains…
a) ribose and uracil
b) deoxyribose and uracil
c) deoxyribose and thymine
d) ribose and adenine
e) ribose and thymine
Two differences between DNA and RNA are that only the
RNA contains…
a) ribose and uracil
b) deoxyribose and uracil
c) deoxyribose and thymine
d) ribose and adenine
e) ribose and thymine