Module 4
Metabolism of Carbohydrate, Fats and Protein
Chem 224 Biochemistry
Submitted by:
Shaira L. Bayubay BSED- SCIENCE 2D
,Pre-Test
I. Instructions: choose the correct answer from the options given. Write
the letter of your answer.
1. Which of the following are products of the Kreb’s Cycle?
a. Acetyl CoA and NADH
b. Acetyl CoA and Co2
c. Co2 and H20
d. Co2 and FADH2
2. Which of the following is an electron carrier that shuttles electrons between various
protein complexes in the electron transport chain?
a. FMN
b. NADH
c. Cyt c
d. Cyta3
3. Lactate fermentation can occur in:
a. Humans, animals, microorganism
b. Humans, animals but not in microorganism
c. Microorganisms, but not in humans and animals
d. Microorganisms, humans but not in animals
4. As part of the Cori Cycle, which will occur in liver cells.
a. Glucose is converted to pyruvate
b. Glucose is converted to lactate
c. Lactate is converted to pyruvate
d. Pyruvate is converted to lactate
5. In what organ will gluconeogenesis occur?
a. Liver
b. Adrenals
c. Pancreas
d. Small intestines
6. Amino acid metabolism differs from glucose and fatty acid metabolism because:
a. Amino acid cannot be used for energy production
b. There is no storage from for amino acids
c. Amino acids cannot be converted to acetyl CoA
d. All metabolic intermediates contain nitrogen
7. Amino acids in the amino acid pool are utilized by the body except:
a. Synthesis of proteins
b. Synthesis of non-essential amino acids
c. Synthesis of non-protein nitrogen containing substance
d. Synthesis of essential amino acids
8. Pyridoxal phosphate is needed in:
a. Urea cycle
b. Formation of hemoglobin
c. Transamination
, d. Deamination
9. The intermediate needed in Kreb’s cycle produced in the urea cycle is:
a. Ornithine
b. Fumarate
c. Oxaloacetate
d. Citrulline
10. What substance is always present as a reactant in oxidative deamination of amino
acids?
a. Ammonium ion
b. Water
c. NADH
d. Keto acid
11. In the oxidation of fatty acids, the molecule that carries activated fatty acid into the
inner mitochondrial membrane is:
a. CoA
b. Carnitine
c. Acetyl CoA
d. Citrate
12. A substance which serves as intermediate for both Kreb’s cycle and lipogenesis.
a. Acetoacetate
b. Oxaloacetate
c. Isopentyl pyrophosphate
d. Citrate
13. A ketone body is produced when the following condition occurs
a. When there is more acetyl CoA
b. Prolonged fasting and starvation
c. When there is balance between carbohydrate and lipid metabolism
d. When acetyl CoA is processed in Kreb’s cycle
14. Lipogenesis can occur in the body:
a. Particularly in the muscles
b. When dietary intake exceeds energy requirement
c. Presence of FAD and NAD
d. Presence of CoA
15. In cholesterol biosynthesis
a. The last stage is conversion of acetyl Co-A to mevalonate
b. The second stage is conversion of squalene to lanosterol
c. Cholesterol is eventually converted to steroid hormones
d. The third stage is conversion of mevalonate to squalene
Setting-up
From the process of digestion, what are the end products formed when you eat foods rich in:
1. Carbohydrates
Monosaccharides: glucose, fructose, and galactose.
2. Fats
Fatty acid: glycerol
3. Protein
Amino acids
Metabolism of Carbohydrate, Fats and Protein
Chem 224 Biochemistry
Submitted by:
Shaira L. Bayubay BSED- SCIENCE 2D
,Pre-Test
I. Instructions: choose the correct answer from the options given. Write
the letter of your answer.
1. Which of the following are products of the Kreb’s Cycle?
a. Acetyl CoA and NADH
b. Acetyl CoA and Co2
c. Co2 and H20
d. Co2 and FADH2
2. Which of the following is an electron carrier that shuttles electrons between various
protein complexes in the electron transport chain?
a. FMN
b. NADH
c. Cyt c
d. Cyta3
3. Lactate fermentation can occur in:
a. Humans, animals, microorganism
b. Humans, animals but not in microorganism
c. Microorganisms, but not in humans and animals
d. Microorganisms, humans but not in animals
4. As part of the Cori Cycle, which will occur in liver cells.
a. Glucose is converted to pyruvate
b. Glucose is converted to lactate
c. Lactate is converted to pyruvate
d. Pyruvate is converted to lactate
5. In what organ will gluconeogenesis occur?
a. Liver
b. Adrenals
c. Pancreas
d. Small intestines
6. Amino acid metabolism differs from glucose and fatty acid metabolism because:
a. Amino acid cannot be used for energy production
b. There is no storage from for amino acids
c. Amino acids cannot be converted to acetyl CoA
d. All metabolic intermediates contain nitrogen
7. Amino acids in the amino acid pool are utilized by the body except:
a. Synthesis of proteins
b. Synthesis of non-essential amino acids
c. Synthesis of non-protein nitrogen containing substance
d. Synthesis of essential amino acids
8. Pyridoxal phosphate is needed in:
a. Urea cycle
b. Formation of hemoglobin
c. Transamination
, d. Deamination
9. The intermediate needed in Kreb’s cycle produced in the urea cycle is:
a. Ornithine
b. Fumarate
c. Oxaloacetate
d. Citrulline
10. What substance is always present as a reactant in oxidative deamination of amino
acids?
a. Ammonium ion
b. Water
c. NADH
d. Keto acid
11. In the oxidation of fatty acids, the molecule that carries activated fatty acid into the
inner mitochondrial membrane is:
a. CoA
b. Carnitine
c. Acetyl CoA
d. Citrate
12. A substance which serves as intermediate for both Kreb’s cycle and lipogenesis.
a. Acetoacetate
b. Oxaloacetate
c. Isopentyl pyrophosphate
d. Citrate
13. A ketone body is produced when the following condition occurs
a. When there is more acetyl CoA
b. Prolonged fasting and starvation
c. When there is balance between carbohydrate and lipid metabolism
d. When acetyl CoA is processed in Kreb’s cycle
14. Lipogenesis can occur in the body:
a. Particularly in the muscles
b. When dietary intake exceeds energy requirement
c. Presence of FAD and NAD
d. Presence of CoA
15. In cholesterol biosynthesis
a. The last stage is conversion of acetyl Co-A to mevalonate
b. The second stage is conversion of squalene to lanosterol
c. Cholesterol is eventually converted to steroid hormones
d. The third stage is conversion of mevalonate to squalene
Setting-up
From the process of digestion, what are the end products formed when you eat foods rich in:
1. Carbohydrates
Monosaccharides: glucose, fructose, and galactose.
2. Fats
Fatty acid: glycerol
3. Protein
Amino acids
