What is DNA?

Mr. Anderson explains the structure and function of DNA, emphasizing its role as the foundation of genetics. He describes nucleotides as the building blocks of DNA, detailing their components: nitrogenous bases, deoxyribose sugar, and phosphate groups. The video covers the anti-parallel nature of DNA strands, the significance of 3' and 5' ends, and the importance of base pairing. Mr. Anderson highlights DNA's stability and its ability to store genetic information, comparing it to RNA and discussing its evolutionary advantages.

What are the building blocks of DNA?

• Nucleotides

• Amino acids

• Sugars

• Proteins

Which of the following is a purine found in DNA?

• Adenine

• Uracil

• Thymine

• Cytosine

What sugar is found in the structure of DNA?

• Ribose

• Deoxyribose

• Glucose

• Fructose

In DNA, what does the term 'antiparallel' refer to?

• The identical orientation of the two strands

• The perpendicular orientation of the two strands

• The opposite orientation of the two strands

• The parallel orientation of the two strands

Which type of bond holds the nitrogenous bases together in DNA?

• Ionic bonds

• Covalent bonds

• Metallic bonds

• Hydrogen bonds

Which base pairs with adenine in DNA?

• Cytosine

• Uracil

• Guanine

• Thymine

What is the significance of weak hydrogen bonds in DNA?

• They strengthen the DNA backbone

• They make DNA rigid

• They allow DNA to unzip easily

• They prevent DNA replication

What gives DNA its three-dimensional shape?

• Hydrogen bonds

• Covalent bonds

• Ionic bonds

• Metallic bonds

Why is DNA considered more stable than RNA?

• It is found outside the nucleus

• It contains uracil

• It has a more stable three-dimensional shape

• It has a single strand

What evolutionary advantage does DNA have over RNA?

• It is less stable

• It can mutate more easily

• It is more complex

• It has a backup copy for error correction