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 nucleoside consists of the base adenine attached to a ribose sugar?

Guanosine

Thymidine

Adenosine

Cytidine

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Verified step by step guidance

Step 1: Understand the structure of a nucleoside. A nucleoside consists of a nitrogenous base (purine or pyrimidine) attached to a sugar molecule, which can be either ribose (in RNA) or deoxyribose (in DNA).

Step 2: Identify the nitrogenous base adenine. Adenine is a purine base with a double-ring structure, commonly found in both DNA and RNA.

Step 3: Recall that when adenine is attached to a ribose sugar, the resulting nucleoside is called adenosine. This is specific to RNA, as ribose is the sugar present in RNA.

Step 4: Compare the other options provided: Guanosine consists of guanine attached to ribose, Thymidine consists of thymine attached to deoxyribose (specific to DNA), and Cytidine consists of cytosine attached to ribose.

Step 5: Conclude that the nucleoside consisting of adenine attached to ribose is adenosine, based on the structural pairing of adenine with ribose.