DNA Structure and Nucleotide Components

Which component is NOT part of a nucleotide?

• Amino acid

• Sugar

• Phosphate group

• Nitrogenous base

What is the function of DNA?

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

• DNA is responsible for the production of energy in cells.

• DNA helps in the digestion of food in the stomach.

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

What is the significance of complementary base pairing?

• It allows for the formation of hydrogen bonds between nucleotides.

• It ensures accurate DNA replication and transcription.

• It prevents mutations in the DNA sequence.

• It facilitates the translation of RNA into proteins.

How many chromosomes are present in the human body?

• 44 chromosomes

• 46 chromosomes

• 48 chromosomes

• 42 chromosomes

Which nitrogenous bases pair together in DNA?

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

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

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

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

How many cells are estimated to be in the human body?

• 50 trillion

• 75 trillion

• 100 trillion

• 25 trillion

How does DNA replication occur?

• DNA replication occurs through the unwinding of the double helix and the synthesis of new complementary strands.

• DNA replication occurs through the splitting of the double helix into two separate strands without any synthesis.

• DNA replication occurs by the addition of nucleotides to a single-stranded template without unwinding.

• DNA replication occurs through the formation of a triple helix structure that stabilizes the DNA.

What is a mutation in DNA?

• A mutation is a change in the DNA sequence that can lead to changes in protein function.

• 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 molecules.

What is the complementary DNA sequence for ATG?

• TAC

• ATC

• GTA

• CAG

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)

• Cytosine (C), Thymine (T), Guanine (G), and Ribose (R)