Microbiology - Chapter 8
- 1.The synthesis of DNA, in which small nucleotides are joined together to make a single large molecule would be most correctly described as being a/n ________ reaction.
- A.
Metabolic
- B.
Anabolic
- C.
Catabolic
- D.
Cytobolic
- 2.Photoautotrophs obtain energy from
- A.
Light and use carbon dioxide as a carbon source
- B.
Organic molecules and use carbon dioxide as a carbon source
- C.
Inorganic substances and use carbon dioxide as a carbon source
- D.
Light and use inorganic substances as a carbon source
- 3.Organisms which get their carbon from other organisms are
- A.
Autotrophs
- B.
Chemotrophs
- C.
Phototrophs
- D.
Heterotrophs
- 4.Digestive reactions where large molecules are broken down into smaller ones is called:
- A.
Metabolism
- B.
Catabolism
- C.
Biosynthesis
- D.
Anabolism
- 5.Enzymes work by
- A.
Lowering the energy of the reactants
- B.
Raising the energy of the products
- C.
Decreasing the activation energy of the reaction
- D.
Increasing the activation energy of the reaction
- 6.Factors that affect the rate of enzyme catalyzed reactions include
- A.
Temperature
- B.
PH
- C.
Concentration of enzyme
- D.
All of the above
- 7.Which of the following is not a carrier molecule that carries hydrogen atoms or electrons in oxidative
- A.
Iron
- B.
FAD
- C.
Niacin
- D.
NAD
- 8.In glycolysis each molecule of glucose eventually produces ________ molecules of pyruvic acid.
- A.
One
- B.
Two
- C.
Three
- D.
Four
- 9.Which of the following is true about glycolysis?
- A.
The net yield of ATP is two ATPs for each molecule of glucose
- B.
It provides cells with a relatively large amount of energy
- C.
Four molecules of ATP are used in the initial phosphorylation steps
- D.
The ATP that is used up during glycolysis is not considered in calculating the net yield of ATP
- 10.During glycolysis, electrons are initially transferred to
- A.
NAD
- B.
FAD
- C.
NADP
- D.
H2O
- 11.Organisms that can use oxygen for metabolic reactions but can also function in an environment devoid of oxygen are termed
- A.
Aerobes
- B.
Anaerobes
- C.
Aerophiles
- D.
Facultative anaerobes
- 12.Aerotolerant anaerobes
- A.
Can only utilize oxygen and can detoxify it
- B.
Require a small amount of oxygen to survive and grow
- C.
Can't survive in presence of oxgen
- D.
Do not utilize oxygen but can survive ad grow in its presence
- 13.In fermentation reactions occuring in yeast to produce wine, two products of the reactions are _______ and ____________.
- A.
Acid; hydrogen gas
- B.
Hydrogen gas; propionic acid
- C.
Ethyl alcohol; methane
- D.
Carbon dioxide; ethyl alcohol
- 14.The initial substrate molecule for the Krebs cycle is
- A.
Pyruvic acid
- B.
Acetyl-CoA
- C.
Acetic acid
- D.
Butanediol
- 15.In aerobic respiration, the final electron acceptor is
- A.
Water
- B.
Oxygen
- C.
Sulfur
- D.
Coenzyme Q
- 16.The prokaryotic aerobic metabolism of glucose produces a total (net) of ________ molecules of ATP.
- A.
24
- B.
30
- C.
34
- D.
38
- 17.Which reaction takes place in the mitochondrial matrix?
- A.
Glycolysis
- B.
Fermentation
- C.
Krebs cycle
- D.
Electron transport
- 18.The first step in protein metabolism is the breakdown of proteins into
- A.
Nucleotides
- B.
Fatty acids
- C.
Amino acids
- D.
Coenzymes
- 19.The green sulfur and purple sulfur bacteria are capable of
- A.
Carrying out photosynthesis
- B.
Only obtaining energy from organic molecules
- C.
Bypassing glycolysis for the Krebs cycle
- D.
Metabolizing without enzymes
- 20.In photosynthesis, light energy is used to
- A.
Break down proteins
- B.
Phosphorylate ADP to form ATP
- C.
Metabolize glycerol
- D.
Synthesize carbohydrates
- 21.In photosynthesis, chemical energy is used to make organic molecules in the
- A.
Light reaction
- B.
Dark reaction
- C.
Hydrolytic reaction
- D.
Photophosphorylation reaction
- 22.Bioluminescent microbes
- A.
May have evolved to remove oxygen from the atmosphere
- B.
Are often beneficiares of symbiotic relationships with a larger host, producing light in exchange for nutrients
- C.
Often have the enzyme luciferase which catalyzes the oxidation reaction that emits light
- D.
All of the above
- 23.Glucose is to photosynthesis as pyruvate is to
- A.
Oxidative phosphorylation
- B.
Glycolysis
- C.
Fermentation
- D.
Krebs cycle
- 24.Which one of the following pairs is mismatched
- A.
Alcohol-fermentation
- B.
Pyruvate-glycolysis
- C.
Carbon dioxide-glycolysis
- D.
NADH-Krebs cycle
- 25.A holoenzyme consists of
- A.
An apoenzyme plus a cofactor
- B.
An apoenzyme plus a coenzyme
- C.
A protein and non-protein component
- D.
All of the above
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