BSC 108 COMPREHENSIVE QUESTIONS AND
COMPLETE SOLUTIONS TEST PAPER
●● What is DNA composed of?
Answer: nucleotide subunits
●● What is the backbone of DNA?
Answer: deoxyribose and a phosphate group
●● What is the backbone of DNA covalently bonded to?
Answer: nitrogen-containing bases
●● How many strands of DNA does a DNA molecule contain?
Answer: two
●● The two strands of DNA are:
Answer: complementary
●● What are the nitrogen-containing bases in DNA?
Answer: adenine, guanine, thymine, cytosine
●● How are the nitrogen-containing bases held together?
,Answer: hydrogen bonds
●● What bases pair together?
Answer: adenine=thymine
guanine=cytosine
●● How does DNA replicate?
Answer: 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.
Answer: complementary strands
●● Each strand is used as a ______________ to make a new strand.
Answer: template
●● What are the two daughter molecules composed of?
Answer: One "old" (parent) strand and one "new" (synthesized) strand
●● Where do parent strands separate?
, Answer: origins of replication
●● Where and how does synthesis of two new complementary strands
occur?
Answer: 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?
Answer: merge
●● How does an organism's DNA lead to specific traits?
Answer: by dictating the synthesis of proteins
●● What is the structure of RNA?
Answer: single-stranded nucleic acid
●● RNA contains ________ instead of thymine.
Answer: Uracil
●● What sugar is used in RNA?
Answer: ribose
●● What is the function of mRNA (messenger RNA)?
COMPLETE SOLUTIONS TEST PAPER
●● What is DNA composed of?
Answer: nucleotide subunits
●● What is the backbone of DNA?
Answer: deoxyribose and a phosphate group
●● What is the backbone of DNA covalently bonded to?
Answer: nitrogen-containing bases
●● How many strands of DNA does a DNA molecule contain?
Answer: two
●● The two strands of DNA are:
Answer: complementary
●● What are the nitrogen-containing bases in DNA?
Answer: adenine, guanine, thymine, cytosine
●● How are the nitrogen-containing bases held together?
,Answer: hydrogen bonds
●● What bases pair together?
Answer: adenine=thymine
guanine=cytosine
●● How does DNA replicate?
Answer: 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.
Answer: complementary strands
●● Each strand is used as a ______________ to make a new strand.
Answer: template
●● What are the two daughter molecules composed of?
Answer: One "old" (parent) strand and one "new" (synthesized) strand
●● Where do parent strands separate?
, Answer: origins of replication
●● Where and how does synthesis of two new complementary strands
occur?
Answer: 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?
Answer: merge
●● How does an organism's DNA lead to specific traits?
Answer: by dictating the synthesis of proteins
●● What is the structure of RNA?
Answer: single-stranded nucleic acid
●● RNA contains ________ instead of thymine.
Answer: Uracil
●● What sugar is used in RNA?
Answer: ribose
●● What is the function of mRNA (messenger RNA)?
