Unit 7 | Molecular Biology

Front

What is splicing in molecular biology?

Back

Splicing is the process of removing introns from pre-mRNA and joining exons together to form mature mRNA.

Front

What is the purpose of gel electrophoresis?

Back

Gel electrophoresis is used to separate DNA fragments based on their molecular size.

Front

Are PCR primers single-stranded RNA sequences?

Back

False. PCR primers are short, single-stranded DNA sequences.

Front

What is the function of a promoter in transcription?

Back

A promoter signals the start of transcription by providing a binding site for RNA polymerase.

Front

What signals the termination of translation?

Back

The stop codon signals the termination of translation.

Front

Define transcription in molecular biology.

Back

Transcription is the process of synthesizing RNA from a DNA template.

Front

What is the role of ribosomes in protein synthesis?

Back

Ribosomes facilitate the translation of mRNA into a polypeptide chain (protein).

Front

What are introns and exons?

Back

Introns are non-coding regions of a gene that are removed during splicing, while exons are coding regions that remain in the mature mRNA.

Front

What is the difference between DNA and RNA?

Back

DNA is double-stranded and contains deoxyribose sugar, while RNA is single-stranded and contains ribose sugar.

Front

What is the significance of the start codon?

Back

The start codon (AUG) signals the beginning of translation and codes for the amino acid methionine.