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72 Cards in this Set

  • Front
  • Back
Catabolsim is an essentially ______ process.
a. synthesis
b. exothermic
c. exothermic
d. isothermic
C
T/F
Glycogenloysis is the cleavage of glucose-1-phosphate from the ends of glycogen molecules.
F
Which of the following can enter the glycolysis pathway?
a. glucose
b. fructose
c. galactose
d. all of the following
D
Which is the product of the first stage of glycolysis?
a. glucose-6-phosphate
b. pyruvate
c. glyceraldehyde-3-phosphate
d. lactate
C
Under aerobic conditions in the body, pyruvate is converted to:
a. lactate
b. acetyl- CoA
c. ethanol
d. acetaldehyde
B
One turn of the Krebs cycle produces ______ molecules of CO2.
a. 2
b. 3
c. 4
d. 5
A
The net yield of ATP from the complete catabolism of one molecule of glucose is:
a. 18
b. 24
c. 36
d. 42
C
The majority of ATP produced during the catabolism of glucose is formed during:
a. oxidative phosphorylation
b. glycolysis
c. the Kreb's cycle
d. glycogenolysis
A
ASpproximately ___ percent of the energy available from glucose catabolism is trapped in the formation of ATP.
a. 20
b. 40
c. 60
d. 80
B
T/F
NADH is the coenzyme used in anabolism (synthesis).
F
T/F
The protein complex which is responsible for respiration is imbedded in the inner mitochondrial membrane.
T
T/F
The catabolism of fatty acids is called beta-oxidation.
T
T/F
Ketone bodies are formed when the concentration of acteyl-CoA in the mitochondria is very high.
T
T/F
In the cytoplasm acetyl-CoA is used in the synthesis of steroids.
T
The activator/carrier molecule used in fatty acid biosynthesis is:
a. CoASH
b. ACP
c. FAD
d. NADH
B
Which of the following is a ketone body?
a. acetyl CoA
b. acetone
c. acetaldehyde
d. malonyl-CoA
B
The most important function of amino acids is for the synthesis of:
a. glucose
b. pyruvate for energy production
c. proteins
d. purines and pyrimidines
C
Two key aminoacids in the catabolism of the amino group of the aminoacids are glutamate and _____.
a. phenylalanine
b. glycine
c. serine
d. asparate
D
Oxidative deamination of the aminoacids produce:
a. urea
b. CO2 and HOH
c. ammonium ion
d. aspartate
C
The direct "fuel" for the urea cycle is:
a. ammonium ion
b. glutamate
c. carbamoyl phosphate
d. pyruvate
C
The production of glutamate from aspartate is called:
a. transamination
b. deamination
c. decarboxylation
d. aminogenesis
A
T/F
Carbamoyl phosphate is produced by the reaction of CO2, ammonium ion and ATP.
T
T/F
The second amino group of urea is derived from aspartate.
T
T/F
The molecule which reacts with carbamoyl phosphate at the start of the urea cycle is oxaloacetate.
F
Catabolism is an essentially ______ process.
a. anergonic
b. endergonic
c. exergonic
d. isergonic
C
Direct phosphorylation of glucose by ATP leads to the formation of:
a. glucose-1-phosphate
b. glucose-6-phosphate
c. glucose-1,6-diphosphate
d. fructose-6-phosphate
B
The product of glycogenolysis is:
a. glucose
b. glycogen
c. glucose-1-phosphate
d. glucose-6-phosphate
C
Glycolysis occurs within the:
a. mitochondria
b. nucleus
c. ribosomes
d. cytoplasm
D
Which of the following can not enter the glycolysis pathway?
a. glucose
b. fructose
c. galactose
d. glycogen
D
Which coenzyme is used in most oxidation-reduction reactions of carbohydrate catabolism?
a. ATP/ADP
b. NAD+/NADH
c. NADP+/NADPH
d. CoASH
B
Which is the production of the endergonic stage of glycolysis?
a. glucose-6-phosphate
b. pyruvate
c. glyceraldehyde-3-phosphate
d. lactate
C
The net ATP output for glycolysis is ___ per glucose molecule.
a. 1
b. 2
c. 3
d. 4
B
Which of the following is the final product of glycolysis?
a. pyruvate
b. carbon dioxide and water
c. lactate
d. acetyl-CoA
A
Which coenzyme must be reoxidized so that glycolysis can continue to produce energy?
a. NADH
b. NADP+
c. FADH2
d. NAD
A
Under anaerobic conditions in the body, pyruvate is converted to:
a. lactate
b. acetyl-CoA
c. ethanol
d. acetaldehyde
A
Under anaerobic conditions in a muscle cell, pyruvate is converted to:
a. ethanol
b. CO2 and HOH
c. acetyl-CoA
d. none of these
D
T/F
The production of triose phosphates in the first stage of glycolysis is an endothermic sequence of reactions.
T
The oxidative (aerobic) reactions of metabolism occur in the:
a. cytoplasm
b. mitochondria
c. nucleus
d. ribosomes
B
The direct precurser for the citric acid cycle is:
a. glucose
b. glycogen
c. fatty acids
d. acetyl-CoA
D
Glyceraldehyde-3-phosphate and dihyroxyacetonephosphate are:
a. triose
b. functional isomers
c. monosaccharides
d. all of the above
D
The products of the tricarboxylic acid cycle are CO2 and:
a. 3NADPHs, 1FAD, and 1ATP
b. NAD+
c. NADPH
d. 3NADH, 1FADH, and 1GTP
D
T/F
Gluconeogenesis is the porduction of glucose from non-carbohydrate sources.
T
T/F
The electron transport system (ETS) of respiratory chain is found dispersed in the mitochondrial matrix.
F
What metal ions are present in the cytochromes of the ETS aid in the passage of electrons down the chain?
a. Cr+++ and Ca++
b. Fe++ and Fe+++
c. Zn and Zn++
d. Na+ and Mg++
B
The final electron acceptor during resiration is:
a. NAD
b. NADH2
c. FAD
d. O2
D
The formation of ATP in the ETS is called:
a. reductive phosphorylation
b. substrate phosphorylation
c. oxidative phosphorylation
d. substrate oxidation
C
T/F
It is possible to oxidize the hydrogen atoms of acetyl-SCoA without having oxidative phosphorylation occur.
T
T/F
Oxidative phosphorylation and electron transport are coupled in the ETS.
T
T/F
Glycogenolysis directly leads to the formation of glucose-6-phosphate which undergoes glycolysis.
F
An important product of pentose phosphate pathway (shunt) is:
a. NADH
b. NADPH
c. FADH2
d. FPH2
B
Another important product of the pentose shunt is:
a. ribose-5-phosphate
b. fructose-1,6-diphosphate
c. galactose-1-phosphate
d. phosphoenolpyruvate (PEP)
A
T/F
NADPH is the coenzyme used in anabolic reations(synthesis).
T
T/F
The protein complex which is resonsible for respiration is dispersed in the mitochondrial matrix.
F
Before fats and oils can be metabolized, fatty acids must be relesed from triglycerides with the aid of a triglyceride lipase.
T
T/F
The anabolism of fatty acids is called beta-oxidation.
F
The activator/carrier molecule used in fatty acid catabolism is:
a. coenzyme-A, CoASH
b. acyl carrier protein (ACP), fatty acid synthestase
c. NAD +
d. ATP
A
Complete beta-oxidation of a 12-carbon fatty acid produces ___ molecules of acetyl-CoA.
a. 2
b. 4
c. 6
d. 12
C
T/F
Beta-oxidation occurs in the cytoplasm of a cell.
F
T/F
Fatty acid synthesis is the complete reverse of beta-oxidation.
F
The protein which is responsible for the transport of fatty acids through the inner mitochondrial membrane into the matrix is:
a. CoASH
b. ACP
c. carnitine
d. albumin
C
T/F
The synthesis of a 12 carbon fatty acid is achieved bu the sequential condensation of 6 acetyl CoA molecules.
F
Which coenzyme is the reducing agent used in fatty acid biosynthesis?
a. NAD+
b. NADH
c. NADPH
d. FADH2
C
T/F
The key intermediate in fatty acid synthesis is the free three carbon diacid malonate.
F
T/F
Ketone bodies are formed when the concentration of acetyl-CoA in the cytoplasm is very high.
F
T/F
In the cytoplasm acetyl-CoA is used in the synthesis of non-saponifiable lipids.
T
The activator/carrier molecule used in fatty acid oxidations is:
a. CoASH
b. ACO
c. FAD+
d. NADH
A
Which of the following is a ketone body?
a. acetyl-CoA
b. acetone
c. malonate
d. malonyl-CoA
B
The most important function of aminoacids is for the synthesis of:
a. glucose
b. pyruvate for energy production
c. proteins
d. purines and pyrimidines
C
The key aminoacids in the catabolism of the amino group of aminoacids are glutamate and ______.
a. phenylalanine
b. glycine
c. serine
d. aspartate
D
Oxidative deamination of aminoacids directly produces:
a. urea
b. glutamate
c. carbamoyl phosphate
d. pyruvate
C
the production of glutamate from alpha-ketoglutarate is called:
a. transamination
b. deamination
c. decarboxylation
d. aminogenesis
A
The second amino group of urea is derived from:
a. glucose
b. glutamate
c. aspartate
d. acetate
C