DNA Structure

What is the role of DNA in cells?

• DNA stores genetic information and provides instructions for the development and functioning of living organisms.

• DNA is responsible for energy production in cells.

• DNA helps in the digestion of food in organisms.

• DNA acts as a barrier to protect cells from external damage.

What are the four nitrogenous bases in DNA?

• Adenine (A), Thymine (T), Cytosine (C), and Guanine (G)

• Adenine (A), Uracil (U), Cytosine (C), and Guanine (G)

• Adenine (A), Thymine (T), Cytosine (C), and Uracil (U)

• Guanine (G), Thymine (T), Cytosine (C), and Adenosine (A)

What is the complementary base pairing rule in DNA?

• Adenine pairs with Cytosine, and Thymine pairs with Guanine.

• Adenine pairs with Thymine, and Cytosine pairs with Guanine.

• Guanine pairs with Thymine, and Adenine pairs with Cytosine.

• Adenine pairs with Guanine, and Cytosine pairs with Thymine.

What is the structure of DNA?

• DNA is a single strand of nucleotides.

• DNA is a double helix made up of two strands that wind around each other, consisting of nucleotides.

• DNA is a triple helix structure found in some organisms.

• DNA is a linear molecule that does not form any helical structure.

What is a nucleotide?

• A basic building block of proteins, consisting of amino acids.

• A basic building block of DNA, consisting of a sugar, a phosphate group, and a nitrogenous base.

• A type of lipid that stores energy in cells.

• A molecule that carries oxygen in the blood.

What is the significance of the double helix structure of DNA?

• It allows for the efficient storage of genetic information and the accurate replication of DNA.

• It provides a mechanism for protein synthesis.

• It protects DNA from environmental damage.

• It facilitates the transport of RNA in the cell.

What are the three components of a nucleotide?

• Sugar, phosphate, and nitrogen base.

• Amino acids, sugars, and lipids.

• Phosphate, glucose, and amino acids.

• Nitrogen base, fatty acids, and glycerol.

What is a mutation in DNA?

• A mutation is a change in the DNA sequence that can lead to changes in the structure and function of proteins.

• A mutation is a process that repairs damaged DNA sequences.

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

• A mutation is a virus that infects DNA and alters its sequence.

What does DNA stand for?

• Deoxyribonucleic Acid

• Dioxyribonucleic Acid

• Deoxyribose Nucleic Acid

• Deoxyribonucleic Base

How does DNA determine traits in an organism?

• DNA sequences are randomly generated and have no effect on traits.

• DNA sequences code for proteins, which determine the traits and characteristics of an organism.

• DNA is only responsible for the physical appearance of an organism.

• DNA does not play a role in determining traits; it is the environment that shapes characteristics.