DNA Structure

What are the key components of DNA?

• Nitrogen bases, phosphate groups, ribose sugar

• Hydrogen bonds, covalent bonds, helicase

• Amino acids, ribose, phospholipids

• Nitrogen bases, phosphate groups, deoxyribose sugar

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

• Nitrogen bases

• Phosphate groups

• Deoxyribose

• Ribose

What is the function of helicase in DNA replication?

• To add phosphate groups to the DNA strand

  
  

• To form hydrogen bonds between nitrogen bases

  
  

• To form covalent bonds between nucleotides

• To break hydrogen bonds between nitrogen bases

How are the nitrogen bases in DNA paired?

• Adenine with guanine, cytosine with thymine

• Adenine with thymine, guanine with cytosine

• Adenine with cytosine, guanine with thymine

• Adenine with uracil, guanine with cytosine

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

• Covalent bonds

• Hydrogen bonds

• Ionic bonds

• Peptide bonds

What is the function of DNA in cells?

• To store and transmit genetic information

• To carry genetic information

• To provide energy for DNA replication

• To provide energy for cellular processes

Tags

NGSS.HS-LS3-1

What is the primary function of RNA?

• Regulate gene expression by binding to specific proteins

• Carry out the instructions encoded in DNA for protein synthesis

• Store genetic information in the form of a double helix

• Facilitate the transfer of amino acids to the ribosome during protein synthesis

What are the building blocks of DNA?

• carbohydrates

• lipids

• proteins

• nucleotides

Which functional group is shown in red?

• carboxyl group

• hydroxyl group

• amino group

• phosphate group

What is the function of phosphate groups in DNA?

• Phosphate groups determine the genetic code of an organism.

• Phosphate groups form the sides of the DNA ladder.

• Phosphate groups help to link nucleotides together in DNA and RNA.

• Phosphate groups code for specific amino acids.