The video tutorial introduces nucleotides, explaining their structure and importance in forming DNA and RNA. It details the three components of nucleotides: a phosphate group, a five-carbon sugar, and one of four nitrogenous bases (guanine, adenine, cytosine, thymine). The tutorial describes how nucleotides form chains to create DNA, emphasizing the base pairing rules and the DNA structure. It concludes with a recap of the nucleotide's role in nucleic acids, highlighting their significance in cellular functions.

Why are nucleotides important?

• They are used to make DNA and RNA.

• They are used to make proteins.

• They are used to make carbohydrates.

• They are used to make lipids.

Tags

NGSS.HS-LS3-1

What are the three parts of a nucleotide?

• Phosphate group, five-carbon sugar, amino acid

• Phosphate group, six-carbon sugar, nitrogenous base

• Phosphate group, five-carbon sugar, nitrogenous base

• Phosphate group, six-carbon sugar, amino acid

Which nitrogenous base has two rings and contains oxygen?

• Adenine

• Guanine

• Cytosine

• Thymine

Which nitrogenous base has one ring and an amino group?

• Adenine

• Cytosine

• Thymine

• Guanine

What is the sugar in a nucleotide called?

• Fructose

• Glucose

• Deoxyribose

• Ribose

How many types of nitrogenous bases are there in DNA?

• Three

• Two

• Five

• Four

Which nitrogenous base pairs with adenine in DNA?

• Thymine

• Uracil

• Guanine

• Cytosine

What holds the two strands of DNA together in the middle?

• Peptide bonds

• Covalent bonds

• Ionic bonds

• Hydrogen bonds

What forms the 'rungs' of the DNA ladder?

• Amino acids

• Nitrogenous bases

• Sugars

• Phosphate groups

Where is DNA found in the cell?

• Ribosome

• Nucleus

• Mitochondria

• Cytoplasm