Table of contents

1. Introduction to Biochemistry4h 34m
2. Water3h 23m
3. Amino Acids8h 10m
4. Protein Structure10h 4m
5. Protein Techniques14h 5m
6. Enzymes and Enzyme Kinetics13h 38m
7. Enzyme Inhibition and Regulation 8h 42m
8. Protein Function 9h 41m
9. Carbohydrates7h 49m
10. Lipids5h 49m
11. Biological Membranes and Transport 6h 37m
12. Biosignaling9h 45m
Review 1: Nucleic Acids, Lipids, & Membranes2h 47m
Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway3h 12m
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism2h 26m
Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation1h 48m

1. Introduction to Biochemistry

Nucleic Acids

Biochemistry

1. Introduction to Biochemistry

Nucleic Acids

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Multiple Choice

Which three components make up a nucleotide in nucleic acids?

A nitrogenous base, a fatty acid, and a phosphate group

A nitrogenous base, a five-carbon sugar, and a methyl group

A five-carbon sugar, a carboxyl group, and a phosphate group

A nitrogenous base, a five-carbon sugar, and a phosphate group

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Verified step by step guidance

Step 1: Understand the structure of a nucleotide. A nucleotide is the basic building block of nucleic acids (DNA and RNA). It consists of three main components: a nitrogenous base, a five-carbon sugar, and a phosphate group.

Step 2: Identify the nitrogenous base. The nitrogenous base can be one of the following: adenine (A), guanine (G), cytosine (C), thymine (T) in DNA, or uracil (U) in RNA. These bases are responsible for the genetic coding in nucleic acids.

Step 3: Recognize the five-carbon sugar. The sugar in a nucleotide is either deoxyribose (in DNA) or ribose (in RNA). The difference between these sugars is that deoxyribose lacks an oxygen atom on the 2' carbon compared to ribose.

Step 4: Understand the role of the phosphate group. The phosphate group is attached to the 5' carbon of the sugar and is responsible for linking nucleotides together through phosphodiester bonds, forming the backbone of the nucleic acid strand.

Step 5: Eliminate incorrect options. A fatty acid, methyl group, or carboxyl group are not components of a nucleotide. The correct combination is a nitrogenous base, a five-carbon sugar, and a phosphate group.