DNA Structure

What determines the genetic code in a DNA molecule?

• The order (sequence) of the nitrogen bases.

• The number of chromosomes in a cell.

• The type of amino acids present in proteins.

• The presence of ribonucleic acid (RNA).

How many hydrogen bonds are formed between Guanine and Cytosine?

• Two hydrogen bonds.

• Three hydrogen bonds.

• Four hydrogen bonds.

• One hydrogen bond.

What is the role of deoxyribose in DNA?

• Deoxyribose is the sugar component of the DNA backbone.

• Deoxyribose acts as a nitrogenous base in DNA.

• Deoxyribose is responsible for the replication of DNA.

• Deoxyribose provides energy for cellular processes.

What is a mutation in the context of DNA?

• A mutation is a change in the DNA sequence that can affect genetic information.

• A mutation is a process that repairs damaged DNA.

• A mutation is a type of protein that helps in DNA replication.

• A mutation is a virus that infects DNA.

What forms the sides (backbone) of the DNA ladder?

• Deoxyribose sugar and phosphate.

• Ribose sugar and nitrogenous bases.

• Amino acids and proteins.

• Glucose and ribonucleic acid.

Which nitrogen base does Cytosine always pair with?

• Adenine

• Thymine

• Guanine

• Uracil

What is the difference between DNA and RNA?

• DNA is single-stranded and contains ribose.

• DNA is double-stranded and contains deoxyribose.

• RNA is double-stranded and contains deoxyribose.

• RNA is single-stranded and contains deoxyribose.

What is the function of DNA?

• DNA provides energy for cellular processes.

• DNA stores and transmits genetic information.

• DNA helps in the digestion of food.

• DNA is responsible for the movement of muscles.

What is the structure of DNA commonly described as?

• A double helix.

• A triple helix.

• A linear strand.

• A circular loop.

What are the correct complementary base pairs in DNA?

• Adenine pairs with Uracil (A-U) and Guanine pairs with Cytosine (G-C).

• Adenine pairs with Thymine (A-T) and Guanine pairs with Cytosine (G-C).

• Adenine pairs with Cytosine (A-C) and Thymine pairs with Guanine (T-G).

• Adenine pairs with Thymine (A-T) and Guanine pairs with Uracil (G-U).