DNA Versus RNA: Key Differences and Cellular Roles

The video tutorial explains the differences between DNA and RNA. DNA is typically double-stranded and larger, with millions of nucleotides, while RNA is single-stranded and smaller. DNA contains deoxyribose sugar, whereas RNA contains ribose sugar. DNA is mainly found in the nucleus and mitochondria, while RNA is located in the cytosol and ribosomes. DNA has four nitrogenous bases: adenine, guanine, cytosine, and thymine, whereas RNA has uracil instead of thymine.

What is the typical structure of DNA compared to RNA?

• Both DNA and RNA are double-stranded

• Both DNA and RNA are single-stranded

• DNA is double-stranded, RNA is single-stranded

• DNA is single-stranded, RNA is double-stranded

Which molecule is generally larger in terms of nucleotide count?

• RNA

• It varies depending on the organism

• DNA

• Both are equal

What type of sugar is found in DNA?

• Fructose

• Glucose

• Deoxyribose

• Ribose

Which sugar is present in RNA?

• Deoxyribose

• Ribose

• Sucrose

• Lactose

Where is DNA primarily located within a cell?

• Cytosol

• Endoplasmic Reticulum

• Ribosomes

• Nucleus

In which part of the cell is RNA mostly found?

• Nucleus

• Mitochondria

• Cytosol and ribosomes

• Golgi apparatus

Which nitrogenous base is found in RNA but not in DNA?

• Adenine

• Uracil

• Guanine

• Thymine

Which base is present in DNA but replaced by uracil in RNA?

• Thymine

• Adenine

• Cytosine

• Guanine