1.) Plants are |
B. net O2 producers and CO2 consumers |
2.) Animals are |
C. net O2 consumers and CO2 producers |
3.) In animal cells, the primary organelle that generates molecules of ATP is the |
E. mitochondrion |
4.) The main reason that cellular respiration needs to occur step by step is because |
D. it enables cells to harness energy released at each step. |
5.) The chemical formula for glucose is |
A. C6H12O6 (I couldn’t make the numbers small and lowered..) |
6.) During glycolysis, molecules of glucose are |
D. broken down into two molecules of pyruvate. |
7.) Glycolysis of a glucose molecule |
A. produces a net gain of two molecules of ATP |
8.) The three main biochemical pathways of cellular respiration are |
D. glycolysis, Krebs cycle, and electron transport chain. |
9.) The electrons that are transferred during cellular respiration are carried in the molecules |
B. NADH and FADH2. (The 2 is in fact small.. but it again wont let me lower it..) |
10.) Glycolysis occurs in the |
A. cytoplasm. |
The Krebs cycle occurs in the A. lysosome. |
D. Mitochondrion |
The electron transport chain occurs in the A. lysosome. |
E. Mitochondrion |
13.The "spent" electrons from the electron transport chain in aerobic respiration are transferred to |
A. oxygen. |
14.) The products of cellular respiration are |
E. carbon dioxide, water, and ATP |
15.) The reactants for cellular respiration are |
D. glucose and oxygen. |
Fermentation is most common in |
D. mircobes. |
17.) The area enclosed by the highly-folded inner mitochondrial membrane is the |
E. matrix. |
18.) Glycolysis does not require |
E. oxygen. |
19.) During glycolysis, to "activate" glucose two molecules of ____________ are required. |
B. ATP |
20.) In glycolysis, the net number of NADH produced is |
c. 2. |
21.) The net ATP production in glycolysis is only two because |
… |
22.) Only a small amount of ATP is produced during glycolysis because most of the energy stored in a glucose molecule remains in the bonds of |
D. pyruvate |
The compound that enters the Krebs cycle is |
E. acetyl CoA |
The only source of ATP production in cells relying fermentation is |
A. glycolysis. |
The Krebs cycle produces ______, ______, and carbon dioxide. A. glucose, oxygen |
C. ATP, electron carrier molecule |
Since the Krebs cycle is a cyclic pathway, the original acceptor needed to start the Krebs cycle and the end product of the Krebs cycle are A. enzymes. |
D. the same molecule |
The electron transport chain produces a/an _____________ gradient. |
E. proton (H) |
An example of a poison that kills by interfering with ATP production is A. arsenic. |
C. All answers are correct. |
29.) The net ATP yield from a molecule of glucose is ______ ATP molecules. |
B. 36 |
Muscle cells use lactic acid fermentation to |
A. regenerate NAD+ so that glycolysis can continue in the absence of oxygen |
Alcoholic fermentation |
D. All answers are correct |
Which energy pathway is used by all living organisms? A. Aerobic respiration |
B. Carbon reactions |
If you measure the air a person has inhaled and exhaled, you will find that the concentrations have ______ in the exhaled air. A.higher O2 concentrations and lower CO2 concentrations |
A. higher O2 concentrations and lower CO2 concentrations |
When NAD+ picks up two electrons and a proton in reactions of the Krebs cycle to form NADH, the NAD+ is |
C. Reduced |
What happens first to the carbon atoms that enter the Krebs cycle as acetyl CoA? A. They are reduced to form carbon dioxide. |
B. They combine with a 4-carbon sugar to form a 6-carbon sugar citrate. |
What is the role of oxygen in respiration? A. It is formed from the oxidation of water at the beginning of the electron transport chain. |
C. It is reduced at the end of the electron transport chain, forming water. |
Molecules called uncouplers allow protons to cross the inner mitochondrial membrane. What effect would this have on ATP production in the mitochondria? A. decreased ATP, because electrons would not be able to move through the electron transport chain |
… |
Cyanide and carbon monoxide block the final step in the electron transport chain. What effect would this have on ATP production in the mitochondria? A. decreased ATP, because protons would not be able to move across the inner mitochondrial membrane |
… |
A cell produces approximately 30 ATP per glucose molecule. However, if you calculated the total energy in a glucose molecule, 90 ATP should be generated. What is the best explanation for this difference? A. Some of the energy is destroyed. |
E. Lost as heat. |
______ ATP are produced per glucose molecule during fermentation, whereas ______ ATP are produced per molecule of glucose by aerobic respiration. |
C. 2, 30 |
If you put a plant in a chamber and shine a light on it, A. the concentration of O2 will increase and the concentration of CO2 will decrease. |
A. the concentration of O2 will increase and the concentration of CO2 will decrease. |
If you put a plant in a chamber and place it in the dark, A. the concentration of O2 will increase and the concentration of CO2 will decrease. |
… |
Without cellular respiration, organisms A. All answers are correct. |
A. All the answers are correct |
If glucose is unavailable, aerobic respiration may occur with A. All choices are correct. |
A. All are correct. |
A variety of carbohydrates, proteins, and fats in a diet A. provides many molecules which can enter aerobic respiration at different stages. |
A. Provides many molecules which can enter aerobic respiration at different stages. |
If some of the protons are utilized for other functions on the cell and do not flow through ATP synthase after the electron transport chain, then |
A. fewer ATP will be made. |
Cellular aerobic respiration includes glycolysis, the Krebs cycle, and electron transport chain. A. True B. False |
A. True |
Cellular aerobic respiration includes only the Krebs cycle and electron transport chain. A. True B. False |
B. False |
In eukaryotic cells, the electron transport chain occurs in the mitochondria. A. True B. False |
A. True |
Fermentation is a more efficient form of energy production than aerobic respiration. A. True B. False |
B. fasle |
NADH is the only electron carrier produced during aerobic respiration. A. True B. False |
… |
The electron transport chain extracts most of the potential energy in NADH by removing the energy from its electrons in a single step. A. True B. False |
B. Fasle |
Aerobic respiration uses oxygen as its final electron acceptor at the end of the electron transport chain. |
A. True |
Fermentation uses an inorganic molecule as the electron acceptor at the end of the electron transport chain. A. True B. False |
… |
Human muscle cells complete fermentation and anaeobic respiration. A. True B. False |
B. false |
Plant cells complete fermentation and aerobic respiration. A. True B. False |
… |
Fermentation cannot occur in the presence of oxygen. A. True B. False |
A. True |
The products of fermentation can be converted to reactants of aerobic respiration. A. True B. False |
A. True |
BIOLOGY CHAPTER 6
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