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

Carbohydrates

Biochemistry

1. Introduction to Biochemistry

Carbohydrates

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Multiple Choice

Which of the following is incorrect concerning carbohydrate absorption?

All dietary carbohydrates are absorbed as monosaccharides.

Disaccharides can be directly absorbed into the bloodstream without further digestion.

Fructose is absorbed by facilitated diffusion through the GLUT5 transporter.

Glucose and galactose are absorbed in the small intestine via sodium-dependent cotransporters (SGLT1).

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Verified step by step guidance

Step 1: Begin by understanding the process of carbohydrate digestion and absorption. Carbohydrates are broken down into monosaccharides (glucose, fructose, and galactose) before absorption in the small intestine. Disaccharides and polysaccharides must be enzymatically hydrolyzed into monosaccharides.

Step 2: Evaluate the statement 'All dietary carbohydrates are absorbed as monosaccharides.' This is correct because only monosaccharides can be absorbed into the bloodstream. Disaccharides and polysaccharides must be broken down by enzymes such as amylase and disaccharidases.

Step 3: Analyze the statement 'Disaccharides can be directly absorbed into the bloodstream without further digestion.' This is incorrect because disaccharides must be hydrolyzed into monosaccharides by enzymes like maltase, sucrase, and lactase before absorption.

Step 4: Examine the statement 'Fructose is absorbed by facilitated diffusion through the GLUT5 transporter.' This is correct. Fructose is absorbed in the small intestine via facilitated diffusion using the GLUT5 transporter.

Step 5: Review the statement 'Glucose and galactose are absorbed in the small intestine via sodium-dependent cotransporters (SGLT1).' This is correct. Both glucose and galactose are absorbed through active transport mechanisms involving sodium-dependent cotransporters (SGLT1).