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14 Cards in this Set

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  • Back
What is the rule of oxygen in cellular respiration?
It is the final electron acceptor in the electron transport chain.
When the poison cyanide blocks the electron transport chain, glycolysis and the citric acid cycle soon grind to a halt as well. Why do you think they stop?
They run out of NAD+ and FAD.
A biochemist wanted to study how various substances were used in cellular respiration. In one experiment, he allowed a mouse to breathe air containing O2 "labeled" by a particular isotope of oxygen. In the mouse, the labeled oxygen atoms first showed up in
water, H2O
In glycolysis,________ is oxidized and ___ is reduced.
glucose . . . NAD+
What is the most immediate source of energy for making most of the ATP in your cells?
the diffusion of hydrogen ions across a membrane
What conversion represents a reduction reaction?
pyruvate > lactate
Which of the three stages of cellular respiration is considered the most ancient?
Glycolysis is considered the most ancient because it occurs in all living cells and doesn't require oxygen or membrane-enclosed organelles.
Photosynthesis consumes _____ and produces _____.
H2O . . . O2
What are produced by reactions that take place in the thykaloids and consumed by reactions in the stroma?
ATP and NADPH
In photosynthesis, _______ is oxidized and _____ is reduced.
water . . . carbon dioxide
Why is it difficult for most plants to carry out photosynthesis in very hot, dry environments such as deserts?
The closing of stomata keeps CO2 from entering and O2 from leaving the plant.
When light strikes chlorophyll molecules, they lose electrons, which are ultimately replaced by
splitting water
If an intestinal cell in a grasshopper contains 24 chromosomes, a grasshopper sperm cell contains ____ chromsomes.
12
What phases of mitosis is essentially the oppostie of prophase in terms of nuclear changes?
telophase