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 of the following is a characteristic of uridine diphosphate (UDP)?

It contains three phosphate groups linked in a chain.

It acts as a glycosyl carrier in the synthesis of glycogen.

It is a purine nucleotide involved in DNA replication.

It is directly incorporated into RNA during transcription.

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Verified step by step guidance

Understand the structure and function of uridine diphosphate (UDP). UDP is a nucleotide composed of uridine (a pyrimidine base), a ribose sugar, and two phosphate groups. It is not involved in DNA replication or directly incorporated into RNA during transcription.

Review the role of UDP in biochemical processes. UDP acts as a glycosyl carrier molecule, meaning it helps transfer sugar molecules during the synthesis of glycogen and other glycosylation reactions.

Clarify why UDP does not contain three phosphate groups linked in a chain. Unlike ATP, UDP has only two phosphate groups attached to the ribose sugar.

Eliminate incorrect options based on the biochemical role of UDP. It is not a purine nucleotide (purines include adenine and guanine), nor is it directly incorporated into RNA during transcription.

Conclude that the correct characteristic of UDP is its role as a glycosyl carrier in glycogen synthesis, which aligns with its biochemical function in transferring sugar molecules.