BSC 108 Exam 3 180 Questions and
Answers | Accurate Solutions with
Clear Explanations | Grade A+
What is the structure of a strand of DNA? -✓✓double helix, twisted ladder
What is DNA composed of? -✓✓nucleotide subunits
What is the backbone of DNA? -✓✓deoxyribose and a phosphate group
What is the backbone of DNA covalently bonded to? -✓✓nitrogen-containing bases
How many strands of DNA does a DNA molecule contain? -✓✓two
The two strands of DNA are: -✓✓complementary
What are the nitrogen-containing bases in DNA? -✓✓adenine, guanine, thymine,
cytosine
How are the nitrogen-containing bases held together? -✓✓hydrogen bonds
What bases pair together? -✓✓adenine=thymine
guanine=cytosine
How does DNA replicate? -✓✓DNA molecule unwinds and each strand is a template for
complementary base pairing; each daughter helix contains an intact strand from the
, parent helix and a newly synthesized strand therefore DNA replication is
semiconservative
One parent molecule is composed of two __________________ that separate. -
✓✓complementary strands
Each strand is used as a ______________ to make a new strand. -✓✓template
What are the two daughter molecules composed of? -✓✓One "old" (parent) strand and
one "new" (synthesized) strand
Where do parent strands separate? -✓✓origins of replication
Where and how does synthesis of two new complementary strands occur? -
✓✓replication bubbles, using the parent strands as templates
What do the replication bubbles do as DNA replication progresses in both directions at
the replication forks? -✓✓merge
How does an organism's DNA lead to specific traits? -✓✓by dictating the synthesis of
proteins
What is the structure of RNA? -✓✓single-stranded nucleic acid
RNA contains ________ instead of thymine. -✓✓Uracil
What sugar is used in RNA? -✓✓ribose
What is the function of mRNA (messenger RNA)? -✓✓carries the genetic message from
a gene (DNA) to ribosomes that translate it into a protein
Answers | Accurate Solutions with
Clear Explanations | Grade A+
What is the structure of a strand of DNA? -✓✓double helix, twisted ladder
What is DNA composed of? -✓✓nucleotide subunits
What is the backbone of DNA? -✓✓deoxyribose and a phosphate group
What is the backbone of DNA covalently bonded to? -✓✓nitrogen-containing bases
How many strands of DNA does a DNA molecule contain? -✓✓two
The two strands of DNA are: -✓✓complementary
What are the nitrogen-containing bases in DNA? -✓✓adenine, guanine, thymine,
cytosine
How are the nitrogen-containing bases held together? -✓✓hydrogen bonds
What bases pair together? -✓✓adenine=thymine
guanine=cytosine
How does DNA replicate? -✓✓DNA molecule unwinds and each strand is a template for
complementary base pairing; each daughter helix contains an intact strand from the
, parent helix and a newly synthesized strand therefore DNA replication is
semiconservative
One parent molecule is composed of two __________________ that separate. -
✓✓complementary strands
Each strand is used as a ______________ to make a new strand. -✓✓template
What are the two daughter molecules composed of? -✓✓One "old" (parent) strand and
one "new" (synthesized) strand
Where do parent strands separate? -✓✓origins of replication
Where and how does synthesis of two new complementary strands occur? -
✓✓replication bubbles, using the parent strands as templates
What do the replication bubbles do as DNA replication progresses in both directions at
the replication forks? -✓✓merge
How does an organism's DNA lead to specific traits? -✓✓by dictating the synthesis of
proteins
What is the structure of RNA? -✓✓single-stranded nucleic acid
RNA contains ________ instead of thymine. -✓✓Uracil
What sugar is used in RNA? -✓✓ribose
What is the function of mRNA (messenger RNA)? -✓✓carries the genetic message from
a gene (DNA) to ribosomes that translate it into a protein
