What gases do humans breathe in and breathe out?

We breathe in oxygen gas and breathe out carbon dioxide gas.

Why do cells "prefer" to use the aerobic pathway over the anaerobic pathway?

Aerobic path makes a lot more ATP than anaerobic path.

Which of these is the correct balanced equation for aerobic cellular respiration?

C6H12O6 + 6O2 --> 6CO2 + 6H2O + ATP

How do your muscles feel when lactate builds up inside them?

They feel tired, and you feel like you can't push any more.

What is the major requirement for aerobic respiration to take place?

Oxygen gas must be present in the cells.

When lactate builds up, what happens to the pH of the cell, and what are the effects?

pH drops, cell becomes acidic & can't operate normally

What happens when oxygen is absent in cells, when they still need ATP energy?

Cells get a little ATP by fermenting glucose to lactate.

What is the order of the steps of aerobic cellular respiration?

glycolysis, Krebs cycle, electron transport

If oxygen becomes available when the cell is full of lactate, what happens?

The cell uses a little ATP to convert lactate --> glucose.

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Cellular Respiration (Aerobic and Anaerobic)

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a #biology quiz to review the basics of anaerobic and aerobic respiration

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Questions 10

Answers

1
What gases do humans breathe in and breathe out?
We breathe in oxygen gas and breathe out carbon dioxide gas.
We breathe in oxygen gas and breathe out oxygen gas.
We breathe in carbon dioxide gas and breathe out oxygen gas.
We breathe in and breathe out carbon dioxide gas.
2
Why do cells "prefer" to use the aerobic pathway over the anaerobic pathway?
Aerobic path makes a little more ATP than anaerobic path.
The aerobic path produces less ATP than the anaerobic path.
The two pathways make the same ATP, neither is preferred.
Aerobic path makes a lot more ATP than anaerobic path.
3
Which of these is the correct balanced equation for aerobic cellular respiration?
C6H12O6 + 6O2 --> 6CO2 + 6H2O + ATP
6O2 + 6 H2O + ATP --> C6H12O6 + 6CO2
C6H12O6 + 6CO2 --> 6O2 + 6 H2O + ATP
C6H12O6 + 6H2O --> 6CO2 + 6O2 + ATP
4
How do your muscles feel when lactate builds up inside them?
They feel tired, but use the lactate to get energized.
They feel tired, and you feel like you can't push any more.
They feel dehydrated, and you need to stop to have water.
They feel energized, and you feel like you could go forever.
5
In human cells, what is/are the product(s) of anaerobic respiration?
carbon dioxide and water
lactic acid (lactate)
ethanol (alcohol)
6
What is the major requirement for aerobic respiration to take place?
ATP must be present in the cells.
Carbon dioxide gas must be present in the cells.
Water must be present in the cells.
Oxygen gas must be present in the cells.
7
When lactate builds up, what happens to the pH of the cell, and what are the effects?
pH increases, cell becomes acidic & can't operate normally
pH increases, cell becomes basic & can't operate normally
pH drops, cell becomes acidic & can't operate normally
pH drops, cell becomes basic & can't operate normally
8
What happens when oxygen is absent in cells, when they still need ATP energy?
Cells make lots of ATP by fermenting glucose to lactate.
Cells make a little ATP via glycolysis & the Krebs cycle.
Cells make lots of ATP by doing aerobic respiration.
Cells get a little ATP by fermenting glucose to lactate.
9
What is the order of the steps of aerobic cellular respiration?
glycolysis, Krebs cycle, electron transport
electron transport, glycolysis, Krebs cycle
Krebs cycle, electron transport, glycolysis
glycolysis, electron transport, Krebs cycle
10
If oxygen becomes available when the cell is full of lactate, what happens?
The cell continues to build up lactate.
The cell uses a little ATP to convert glucose --> lactate.
The cell uses a little ATP to convert lactate --> glucose.
The cell leaves the lactate alone and uses glucose instead.

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