1.1 The study of life Read Online
Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.
Question: Which of the following is NOT a product of the Krebs cycle?
Choices:
Alcohol
Carbon Dioxide
ATP
FADH2
Question: In aerobic cellular respiration, the majority of ATP is created during:
Choices:
Glycolysis
lactic acid fermentation
The Krebs cycle
The ETC
Question: Cellular respiration is called an aerobic process because it requires
Choices:
Light
Oxygen
Exercise
Glucose
Question: In cellular respiration, a two-carbon molecule combines with a four-carbon molecule to form citric acid as part of
Choices:
glycolysis
carbon fixation
the Krebs cycle
the ETC
Question: Why does cyanide kill people?
Choices:
It prevents the ETC from working correctly
People cannot create NADPh in glycolysis
It prevents pyretic acid from being created
None of the above
Question: Animals breathe in order to take in the carbon dioxide their cells need to perform cellular respiration.
Choices:
True
False
Question: At most, how many molecules of ATP can be produced per glucose molecule in aerobic cellular respiration?
Choices:
2
8
24
36
75
Question: In the process of aerobic respiration, organisms use _________ and give off _________ .
Choices:
oxygen ; carbon dioxide
carbon dioxice ; oxygen
water ; carbon dioxide
oxygen ; oxygen
Question: Which of the following is not part of cellular respiration?
Choices:
ETC
glycolysis
The Krebs cycle
the Calvin Cycle
Question: With oxygen present, the Krebs cycle and the electron transport chain
Choices:
Produce most of the ATP needed for life
Allow organisms to avoid fermentation
Break down glucose to produce carbon dioxide, water, and ATP
All of the Above
Question: When glycolysis occurs,
Choices:
a molecule of glucose is split
two molecules of pyretic acid are made
some ATP is produced
All of the above
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