BIOA01H3 Chapter 7: Chapter 7 (Fall2010)

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jadedolphin901

17 Feb 2012

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Bioa01fall2010 chapter 7: pathways that harvest chemical energy. glycolysis: begins glucose metabolism in all cells and produces two molecules of three carbon product pyruvate. A small amount of the energy stored in glucose is captured in usable forms. cellular respiration: uses oxygen (aerobic) from the environment and completely converts each pyruvate molecule into three molecules of carbon dioxide. A great deal of the energy stored in the covalent bonds of pyruvate is released and transferred to adp and phosphate to form atp. Converts pyruvate into lactic acid or ethyl alcohol which are still energy rich molecules. Because the breakdown of glucose is incomplete, much less energy is released than by cellular respiration. glycolysis takes place first then 3 steps of cellular respiration: pyruvate oxudation, citric acid cycle and the electron transport chain. reduction is the gain of one or more electrons. oxidation is the loss of one or more electrons.

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Glycolysis occurs:
a. only in the presence of oxygen
b. only in eukaryotic cells
c. whether or not oxygen is present
d. in mitochondria
e. in cells without the assistance of enzymes

Glycolysis:
a. releases all the of the chemical energy in the original glucosemolecule
b. occurs in mitochondria
c. produces two molecules that contain much of the chemical energyin the original glucose molecule
d. does not produce any ATP molecules
e. does not require enzymes

The citric acid cycle:
a. produces carbon dioxide. Most of the chemical energy istransferred to the reduced coenzyme NADH
b. directly produces most of ATP formed by breakdown of a glucosemolecule
c. is located in the cytoplasm
d. occurs in both prokaryotic and eukaryotic cells
e. does not require enzymes

In anaerobic environments, yeast cells:
a. cannot make any ATP
b. continue to make ATP by oxidative phosphorylation
c. make more ATP than they do when they are in an aerobicenvironment
d. transfer electrons from NADH to pyruvate so that glycolysis cancontinue
e. immediately die

I have looked everywhere in the chapter and cannot quite find theanswers. These questions seem ambiguous; can someone enlighten me?

What is the main product of cellular respiration?

TRUE or FALSE: Glycolysis does not require oxygen.

During glycolysis, 2 molecules of ___ are required in âglucose primingâ or activation.

In what cells does ethanol fermentation occur?

In what cells does lactic acid fermentation occur?

TRUE or FALSE: The light-dependent reactions of the cyclic pathway produce ATP.

What wavelength of light has the most potential energy for photosynthesis?

Which is the only plant with the ability to overcome the inefficiencies of photorespiration?

Plants appear green because ________ .

The Krebs cycle occurs __ times in order to fully break down glucose.

The Krebs cycle takes place in the ____ of the cell.

TRUE or FALSE: Nucleic Acid can be broken down to create ATP.

The bulk of the ATP that our bodies need is harvested through which of the following: Anearobic processes or Aerobic processes?

TRUE or FALSE: The electron transport chain is aerobic.

How many ATP molecules do anaerobic pathways produce?

1. Aerobic cellular respiration can best be described as a:

a.	a redox reaction to convert energy for metabolism

b.	a need for oxygen in order to store energy in ATP

c.	all answer choices are correct

an organism's way of catabolizing glucose

2. During photosynthesis, electrons from the reaction center chlorophyll are transferred to the electron transport system. These electrons are replaced by the splitting of __________ molecules.

a. glucose

b. carbon dioxide

c. water

d. ATP

During glycolysis:

a.	a glucose molecule is broken down into two pyruvate molecules.

b.	a glucose molecule is formed from carbon dioxide that is fixed by Rubisco.

c.	the energy from electrons forms a proton gradient that is used to synthesize ATP.

d.	the electrons in acetyl-CoA are transferred to electron carriers.

Bacterial cells reproduce through the process of:

a.	cytokinesis

meiosis

mitosis

binary fission

Cytokinesis refers to the:

a.	formation of two new nuclei during telophase.

b.	splitting of the centromere to separate the sister chromatids.

c.	division of the cytoplasm to produce two daughter cells.

d.	division of the genetic material into two daughter cells.

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BIOA01H3 Chapter 7: Chapter 7 (Fall2010)

BIOA01H3 Full Course Notes

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