BSC203 Exam 2 Questions with Answers (100% Correct Answers)

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BSC203 Exam 2 Questions with Answers (100% Correct Answers)

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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.

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