DNA Structure and Replication

What are the key components of DNA?

• Nitrogen bases, phosphate groups, deoxyribose

• Hydrogen bonds, covalent bonds, helicase

• Amino acids, ribose, phospholipids

• Glucose, lipids, oxygen

Which component of DNA forms the backbone of the double helix structure?

• Nitrogen bases

• Phosphate groups

• Deoxyribose

• Covalent bonds

What is the function of helicase in DNA replication?

• To form hydrogen bonds between nitrogen bases

• To break hydrogen bonds between nitrogen bases

• To add phosphate groups to the DNA strand

• To form covalent bonds between nucleotides

How are the nitrogen bases in DNA paired?

• Adenine with guanine, cytosine with thymine

• Adenine with cytosine, guanine with thymine

• Adenine with thymine, guanine with cytosine

• Adenine with uracil, guanine with cytosine

What type of bond holds the nitrogen bases together in DNA?

• Covalent bonds

• Ionic bonds

• Hydrogen bonds

• Peptide bonds

What is the role of phosphate groups in DNA?

• To form the double helix structure

• To carry genetic information

• To provide energy for DNA replication

• To stabilize the DNA molecule

What is the function of DNA in cells?

• To store and transmit genetic information

• To produce proteins

• To regulate cell metabolism

• To provide energy for cellular processes

What is the structure of DNA called?

• Double helix

• Single spiral

• Triple helix

• Twisted ladder

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

• Helicase

• Polymerase

• Ligase

• Primase

What is the function of hydrogen bonds in DNA?

• To attach two Nitrogen Bases

• To provide energy for DNA replication

• To carry genetic information

• To form covalent bonds between nucleotides