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

3. Amino Acids

Amino Acid Groups

Biochemistry

3. Amino Acids

Amino Acid Groups

Previous problemNext problem

Struggling with Biochemistry?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

When an individual consumes excess protein and overall calories, what is the primary fate of the surplus amino acids in the body?

They are excreted unchanged in the urine.

They are converted directly into glycogen for storage in the liver.

They are deaminated and the carbon skeletons are converted to fatty acids for storage as triglycerides.

They are stored in the body as intact proteins for future use.

Previous problemNext problem

Verified step by step guidance

Step 1: Understand the fate of surplus amino acids in the body. Amino acids cannot be stored directly in the body as intact proteins or glycogen. Instead, they undergo metabolic processes to be utilized or stored.

Step 2: Recognize the process of deamination. Surplus amino acids are deaminated, meaning the amino group (-NH2) is removed. This process primarily occurs in the liver.

Step 3: After deamination, the amino group is converted into ammonia (NH3), which is then processed into urea via the urea cycle and excreted in the urine.

Step 4: The remaining carbon skeletons (α-keto acids) from the deaminated amino acids are metabolized. Depending on the body's energy needs, these carbon skeletons can be converted into glucose (gluconeogenesis), used for energy, or converted into fatty acids.

Step 5: When there is an excess of calories, the carbon skeletons are primarily converted into fatty acids, which are then stored as triglycerides in adipose tissue for long-term energy storage.