Biology Chapter 10

Last update by al-moh111 on 06/04/2014
1797599 People have viewed this Quiz
  • Share

Glycolysis is thought to be one of the most ancient of metabolic processes. Which statementsupports this idea?

A) Glycolysis is the most widespread metabolic pathway.

B) Glycolysis neither uses nor needs O2.

C) Glycolysis is found in all eukaryotic cells.

D) The enzymes of glycolysis are found in the cytosol rather than in a membrane-enclosedorganelle.

E) Ancient prokaryotic cells, the most primitive of cells, made extensive use of glycolysis longbefore oxygen was present in Earth's atmosphere.



Answer:

A) Glycolysis is the most widespread metabolic pathway.



View Biology Chapter 10 as Flashcard Deck

Related Quiz Content
  • feldman2009
    Answered in Biology Chapter 10

    Which of the following statements about NAD+ is false?

    A) NAD+is reduced to NADH during both glycolysis and the citric acid cycle.

    B) NAD+has more chemical energy than NADH.

    C) NAD+is reduced by the action of hydrogenases.

    D) NAD+can donate electrons for use in oxidative phosphorylation.

    E) In the absence of NAD+, glycolysis can still function.

    A) NAD+is reduced to NADH during both glycolysis and the citric acid cycle.
  • feldman2009
    Answered in Biology Chapter 10

    Why is glycolysis considered to be one of the first metabolic pathways to have evolved?

    A) It produces much less ATP than does oxidative phosphorylation.

    B) It is found in the cytosol, does not involve oxygen, and is present in most organisms.

    C) It is found in prokaryotic cells but not in eukaryotic cells.

    D) It relies on chemiosmosis which is ametabolic mechanism present only in the first cells- prokaryotic cells.

    E) It requires the presence of membrane-enclosed cell organelles found only in eukaryotic cells.



    B) It is found in the cytosol, does not involve oxygen, and is present in most organisms.



  • feldman2009
    Answered in Biology Chapter 10

    Muscle cells, when an individual is exercising heavily and when the muscle becomes oxygen deprived, convert pyruvate to lactate. What happens to the lactate in skeletal muscle cells?

    A) It is converted to NAD+.

    B) It produces CO2and water.

    C) It is taken to the liver and converted back to pyruvate.

    D) It reduces FADH2to FAD+.

    E) It is converted to alcohol.

    C) It is taken to the liver and converted back to pyruvate.


  • feldman2009
    Answered in Biology Chapter 10

    When muscle cells are oxygen deprived, the heart still pumps. What must the heart cells be able to do?

    A) derive sufficient energy from fermentation

    B) continue aerobic metabolism when skeletal muscle cannot

    C) transform lactate to pyruvate again

    D) remove lactate from the blood

    E) remove oxygen from lactate



    B) continue aerobic metabolism when skeletal muscle cannot



  • feldman2009
    Answered in Biology Chapter 10

    Phosphofructokinase is an important control enzyme in the regulation of cellular respiration. Which of the following statements describes a function of phosphofructokinase?

    A) It is activated byAMP (derived from ADP).

    B) It is activated by ATP.

    C) It is inhibited by citrate, an intermediate of the citric acid cycle.

    D) It catalyzes the conversion of fructose-1,6-bisphosphate to fructose-6-phosphate, an early step of glycolysis.

    E) It is an allosteric enzyme.

    E) It is an allosteric enzyme.
  • feldman2009
    Answered in Biology Chapter 10

    Phosphofructokinase is an allosteric enzyme that catalyzes the conversion of fructose-6- phosphate to fructose-1,6-bisphosphate, an early step of glycolysis. In the presence of oxygen, an increase in the amount ATP in a cell would be expected to

    A) inhibit the enzyme and thus slow the rates of glycolysis and the citric acid cycle.

    B) activate the enzyme and thus slow the rates of glycolysis and the citric acid cycle.

    C) inhibit the enzyme and thus increase the rates of glycolysis and the citric acid cycle.

    D) activate the enzyme and increase the rates of glycolysis and the citric acid cycle.

    E) inhibit the enzyme and thus increase the rate of glycolysis and the concentration of citrate.



    A) inhibit the enzyme and thus slow the rates of glycolysis and the citric acid cycle.



  • feldman2009
    Answered in Biology Chapter 10

    Even though plants carry on photosynthesis, plant cells still use their mitochondria for oxidation of pyruvate. When and where will this occur?

    A) in photosynthetic cells in the light, while photosynthesis occurs concurrently

    B) in non-photosynthesizing cells only

    C) in cells that are storing glucose only

    D) in photosynthesizing cells in dark periods and in other tissues all the time

    E) in photosynthesizing cells in the light and in other tissues in the dark



    D) in photosynthesizing cells in dark periods and in other tissues all the time


  • feldman2009
    Answered in Biology Chapter 10

    In vertebrate animals, brown fat tissue's color is due to abundant mitochondria. White fat tissue, on the other hand, is specialized forfat storage and contains relatively few mitochondria. Brown fat cells have a specialized protein that dissipates the proton-motive force across the mitochondrial membranes. Which of the following might be the function of the brown fat tissue?

    A) to increase the rate of oxidative phosphorylation from its few mitochondria

    B) to allow the animals to regulate their metabolic rate when it is especially hot

    C) to increase the production of ATP synthase

    D) to allow other membranes of the cell to perform mitochondrial function

    E) to regulate temperature by converting energy from NADH oxidation to heat

    E) to regulate temperature by converting energy from NADH oxidation to heat
  • feldman2009
    Answered in Biology Chapter 10

    What is the purpose of beta oxidation in respiration? 

    A) oxidation of glucose 

    B) oxidationof pyruvate 

    C) feedback regulation

    D) control of ATP accumulation 

    E) breakdown of fatty acids 



    E) breakdown of fatty acids 



  • feldman2009
    Answered in Biology Chapter 10

    Where do the catabolic products of fatty acid breakdown enter into the citric acid cycle?

    A) pyruvate

    B) malate or fumarate

    C) acetyl CoA

    D)

    C) acetyl CoA