BSC 108 Exam 3 100 Questions and Answers
(2026) | Fully Solved with Verified Answers |
A+ Verified
• DNA and RNA are polymers composed of nucleotide monomers. -✓✓True
• In a DNA double helix, adenine pairs with ______ and guanine pairs with _______. -
✓✓thymine; cytosine
• If one strand of DNA has the sequence ATCCGA, what is the sequence of the other
strand? -✓✓TAGGCT
• Describe the process of transcription. What are the starting molecules and the end
products? -✓✓Transcription is the manufacture of a strand of RNA complementary to a
strand of DNA. In initiation, RNA polymerase binds to a promoter region on the DNA
strand. RNA synthesis occurs during the elongation phase as RNA nucleotides are
added to the growing RNA polynucleotide. When the RNA polymerase reaches the
terminator region of the gene, elongation stops and the polymerase and new RNA
molecule detach. The starting molecules are DNA, RNA polymerase, and RNA
nucleotides. The end product is a new strand of RNA.
• How many nucleotides make up a codon? -✓✓3
• Which of the following is the correct sequence of events that occurs during
transcription? -✓✓initiation, elongation, termination
• Codon -✓✓a three-nucleotide sequence of DNA or mRNA that specifies a particular
amino acid or termination signal
• Prion -✓✓an infectious form of a protein
, • Bacteriophage -✓✓a virus that infects bacteria
• Intron -✓✓a noncoding portion of a gene
• Exon -✓✓a coding portion of a gene
• Anticodon -✓✓a specific sequence of three nucleotides that is complementary to a
codon
• How do viruses differ from bacterial cells? -✓✓Viruses are not cellular and cannot
reproduce outside of a host organism.
• After replication, each new DNA double helix consists of one old strand and one new
strand. -✓✓true
• A mutagen is any change to the genetic information of a cell or virus. -✓✓false
• Translation converts the information stored in ____ to ____. -✓✓RNA; polypeptide
• What cellular structure facilitates the process of translation? -✓✓ribosomes
• Describe the role of mRNA. -✓✓Messenger RNA encodes genetic information from
DNA and conveys it to the ribosomes, where the information is translated into amino
acid sequences.
• The three parts of a nucleotide are a sugar, a phosphate, and an anticodon. -✓✓false
• A geneticist finds that a particular mutation has no effect on the polypeptide encoded
by the gene. This mutation probably involves -✓✓substitution of one nucleotide.
(2026) | Fully Solved with Verified Answers |
A+ Verified
• DNA and RNA are polymers composed of nucleotide monomers. -✓✓True
• In a DNA double helix, adenine pairs with ______ and guanine pairs with _______. -
✓✓thymine; cytosine
• If one strand of DNA has the sequence ATCCGA, what is the sequence of the other
strand? -✓✓TAGGCT
• Describe the process of transcription. What are the starting molecules and the end
products? -✓✓Transcription is the manufacture of a strand of RNA complementary to a
strand of DNA. In initiation, RNA polymerase binds to a promoter region on the DNA
strand. RNA synthesis occurs during the elongation phase as RNA nucleotides are
added to the growing RNA polynucleotide. When the RNA polymerase reaches the
terminator region of the gene, elongation stops and the polymerase and new RNA
molecule detach. The starting molecules are DNA, RNA polymerase, and RNA
nucleotides. The end product is a new strand of RNA.
• How many nucleotides make up a codon? -✓✓3
• Which of the following is the correct sequence of events that occurs during
transcription? -✓✓initiation, elongation, termination
• Codon -✓✓a three-nucleotide sequence of DNA or mRNA that specifies a particular
amino acid or termination signal
• Prion -✓✓an infectious form of a protein
, • Bacteriophage -✓✓a virus that infects bacteria
• Intron -✓✓a noncoding portion of a gene
• Exon -✓✓a coding portion of a gene
• Anticodon -✓✓a specific sequence of three nucleotides that is complementary to a
codon
• How do viruses differ from bacterial cells? -✓✓Viruses are not cellular and cannot
reproduce outside of a host organism.
• After replication, each new DNA double helix consists of one old strand and one new
strand. -✓✓true
• A mutagen is any change to the genetic information of a cell or virus. -✓✓false
• Translation converts the information stored in ____ to ____. -✓✓RNA; polypeptide
• What cellular structure facilitates the process of translation? -✓✓ribosomes
• Describe the role of mRNA. -✓✓Messenger RNA encodes genetic information from
DNA and conveys it to the ribosomes, where the information is translated into amino
acid sequences.
• The three parts of a nucleotide are a sugar, a phosphate, and an anticodon. -✓✓false
• A geneticist finds that a particular mutation has no effect on the polypeptide encoded
by the gene. This mutation probably involves -✓✓substitution of one nucleotide.
