Exploring DNA: Structure and Functions

What is the primary function of DNA in cells?

• To store energy

• To store genetic information

• To transport proteins

• To catalyze chemical reactions

Which of the following base pairs are found in DNA?

• Adenine and Uracil

• Guanine and Cytosine

• Thymine and Uracil

• Adenine and Guanine

During DNA replication, which enzyme is responsible for unwinding the DNA double helix?

• DNA polymerase

• Helicase

• Ligase

• Primase

What is the role of mRNA in the process of protein synthesis?

• To carry amino acids to the ribosome

• To form the structure of the ribosome

• To carry the genetic code from DNA to the ribosome

• To catalyze the formation of peptide bonds

Which of the following processes occurs in the nucleus of a eukaryotic cell?

• Translation

• Transcription

• Protein folding

• Glycolysis

What is the complementary DNA strand for the sequence 5'-ATCG-3'?

• 5'-TAGC-3'

• 5'-CGAT-3'

• 5'-GCTA-3'

• 5'-ATCG-3'

Which molecule is responsible for bringing amino acids to the ribosome during translation?

• mRNA

• tRNA

• rRNA

• DNA

What is the function of DNA polymerase during DNA replication?

• To unwind the DNA double helix

• To synthesize a new DNA strand

• To join Okazaki fragments

• To add RNA primers

Which of the following is a difference between DNA and RNA?

• DNA contains ribose sugar, while RNA contains deoxyribose sugar

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

• DNA contains thymine, while RNA contains uracil

• DNA is found in the cytoplasm, while RNA is found in the nucleus

What is the role of ribosomes in the cell?

• To replicate DNA

• To synthesize proteins

• To transport lipids

• To store carbohydrates