Intron versus Extrons

What is the primary function of DNA in cells?

• To control the cell's metabolism

• To store genetic information

• To regulate the cell's size and shape

• To produce proteins

What is the difference between introns and exons?

• Introns code for proteins, while exons do not

• Exons are non-coding sequences, while introns contain genetic information

• Introns are removed from the pre-mRNA, while exons are spliced together to form the mature mRNA

• Exons are found only in eukaryotic DNA, while introns are found only in prokaryotic DNA

Which of the following is NOT a characteristic of introns?

• They are transcribed into pre-mRNA

• They are spliced out during RNA processing

• They contain genetic information

• They code for proteins

What is splicing?

• The process of synthesizing mRNA from DNA

• The process of removing introns and splicing exons together to form mature mRNA

• The process of translating mRNA into protein

• The process of copying DNA into RNA

What is the function of mature mRNA?

• To store genetic information

• To code for proteins

• To regulate gene expression

• To transcribe introns

What is the purpose of alternative splicing?

• To increase the number of genes in an organism's genome

• To increase the diversity of proteins that can be produced from a single gene

• To eliminate introns from the pre-mRNA

• To prevent the translation of mRNA into protein

Which of the following is an example of alternative splicing?

• The production of a single mRNA from a gene with no introns

• The production of different proteins from a single gene through the use of different start codons

• The production of different proteins from a single gene through the use of different combinations of exons

• The production of a protein that is shorter than expected due to the presence of a premature stop codon