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BSC203 Exam 2 Questions with Answers (100% Correct
Answers)
Gene expression Answer: Conversion of DNA instructions into RNA and
proteins.
Transcription Answer: Process of synthesizing RNA from DNA template.
RNA polymerase Answer: Enzyme that catalyzes RNA synthesis from
DNA.
Ribose Answer: Sugar present in RNA, replacing deoxyribose.
Uracil (U) Answer: RNA base that substitutes thymine (T) in DNA.
Messenger RNA (mRNA) Answer: RNA that carries protein synthesis
instructions.
Ribosomal RNA (rRNA) Answer: RNA component of ribosomes essential
for translation.
Transfer RNA (tRNA) Answer: Adaptor molecule that translates mRNA
codons to amino acids.
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Promoter Answer: DNA sequence where RNA polymerase binds to
initiate transcription.
General transcription factors Answer: Proteins required for eukaryotic
transcription initiation.
Sigma factor Answer: Subunit aiding bacterial RNA polymerase in
transcription initiation.
Exons Answer: Coding regions of a gene that remain in mRNA.
Introns Answer: Noncoding regions of a gene removed during splicing.
RNA splicing Answer: Process of removing introns and joining exons.
Spliceosome Answer: Complex that catalyzes RNA splicing reactions.
Alternative splicing Answer: Process allowing multiple proteins from
one gene.
5' RNA capping Answer: Modification added to the 5' end of pre-
mRNA.
3' polyadenylation Answer: Addition of poly-A tail to the 3' end of
mRNA.
© 2025 All rights reserved
BSC203 Exam 2 Questions with Answers (100% Correct
Answers)
Gene expression Answer: Conversion of DNA instructions into RNA and
proteins.
Transcription Answer: Process of synthesizing RNA from DNA template.
RNA polymerase Answer: Enzyme that catalyzes RNA synthesis from
DNA.
Ribose Answer: Sugar present in RNA, replacing deoxyribose.
Uracil (U) Answer: RNA base that substitutes thymine (T) in DNA.
Messenger RNA (mRNA) Answer: RNA that carries protein synthesis
instructions.
Ribosomal RNA (rRNA) Answer: RNA component of ribosomes essential
for translation.
Transfer RNA (tRNA) Answer: Adaptor molecule that translates mRNA
codons to amino acids.
© 2025 All rights reserved
, 2
Promoter Answer: DNA sequence where RNA polymerase binds to
initiate transcription.
General transcription factors Answer: Proteins required for eukaryotic
transcription initiation.
Sigma factor Answer: Subunit aiding bacterial RNA polymerase in
transcription initiation.
Exons Answer: Coding regions of a gene that remain in mRNA.
Introns Answer: Noncoding regions of a gene removed during splicing.
RNA splicing Answer: Process of removing introns and joining exons.
Spliceosome Answer: Complex that catalyzes RNA splicing reactions.
Alternative splicing Answer: Process allowing multiple proteins from
one gene.
5' RNA capping Answer: Modification added to the 5' end of pre-
mRNA.
3' polyadenylation Answer: Addition of poly-A tail to the 3' end of
mRNA.
© 2025 All rights reserved
