1st Sessional, Molecular diagnostics and Micro B Voc MLT, VI sem

Which of the following is not a component of a nucleotide?

• Phosphate group
• Ribose sugar
• Glucose Sugar
• Nitrogenous base

The primary structure of DNA refers to

• The sequence of nitrogenous bases
• The arrangement of nucleotides in a double helix
• The presence of hydrogen bonds between complementary bases
• The sugar-phosphate backbone of the molecule

Which enzyme is responsible for unwinding the DNA double helix during replication?

• DNA polymerase
• Helicase
• Ligase
• RNA polymerase

In RNA, uracil pairs with adenine via how many hydrogen bonds?

• One
• Two
• Three
• Four

Which of the following types of RNA carries amino acids to the ribosome during protein synthesis?

• Messenger RNA (mRNA)
• Transfer RNA (tRNA)
• Ribosomal RNA (rRNA)
• Small nuclear RNA (snRNA)

The process of transcription occurs in the?

• Nucleus
• Cytoplasm
• Ribosome
• Mitochondria

Which of the following statements about DNA replication is correct?

• It is a conservative process
• It occurs in the 5' to 3' direction on both strands
• DNA polymerase synthesizes both leading and lagging strands simultaneously
• Primase adds RNA primers to the lagging strand

In eukaryotic cells, where does mRNA processing occur?

• Nucleus
• Ribosome
• Endoplasmic reticulum
• Golgi apparatus

The central dogma of molecular biology states that:

• DNA is transcribed into RNA, which is then translated into protein
• RNA is transcribed into DNA, which is then translated into protein
• DNA is directly translated into protein
• RNA is directly translated into protein

Which of the following is not a pyrimidine base found in DNA?

• Adenine
• Thymine
• Cytosine
• Uracil