Understanding DNA

This video tutorial explains DNA, its location in cells, its function in carrying genetic information, and its structure. DNA is found in the nucleus of eukaryotic cells and in the cytoplasm of prokaryotic cells. It carries genetic information that determines the characteristics of living organisms. DNA is composed of nucleotides, which include a phosphate group, a sugar group, and a nitrogen base. The four bases, adenine, thymine, cytosine, and guanine, pair up to form the double helix structure of DNA.

What does DNA stand for?

• Deoxyribose Nucleic Atom

• Deoxyribose Nucleic Acid

• Deoxyribonucleic Acid

• Deoxyribonucleic Atom

Where is DNA located in eukaryotic cells?

• In the cytoplasm

• In the nucleus

• In the cell membrane

• In the mitochondria

How many pairs of chromosomes do humans have?

• 46 pairs

• 9 pairs

• 28 pairs

• 23 pairs

What is the role of genes in DNA?

• They code for proteins

• They protect the cell

• They transport nutrients

• They store energy

What makes each person's DNA unique?

• The number of chromosomes

• The sequence of genes

• The type of cells

• The amount of DNA

What are the building blocks of DNA?

• Proteins

• Carbohydrates

• Lipids

• Nucleotides

Which of the following is NOT a base found in DNA?

• Uracil

• Cytosine

• Thymine

• Adenine

What shape does DNA form?

• Single Helix

• Double Helix

• Triple Helix

• Quadruple Helix

Which bases pair together in DNA?

• Adenine and Cytosine

• Thymine and Guanine

• Cytosine and Thymine

• Adenine and Thymine

What type of bonds hold the DNA bases together?

• Metallic bonds

• Ionic bonds

• Hydrogen bonds

• Covalent bonds