Cell Biology Questions
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reactions that occur in organisms do so within what range?
ATPdependent phosphorylation of fructose-6-phosphate to fructose-1,6-bisphosphate (reaction 3). The enzyme that catalyzes this reaction, phosphofructokinase, is subject to allosteric control.
To change Fructose 1,6 BisPhosphate to Dihydroxyacetone Phosphate
An enzyme is a lipid that catalyzes chemical reactions. True False
1 Glucose leads to how many pyruvate
An enzyme is a protein that catalyzes chemical reactions. True False
Hexokinase (reaction 1) • Phosphofructokinase (reaction 3) • Pyruvate kinase (reaction 10)
1. Glycolysis is the oxidation of glucose. Pyruvate is the end product.2. Provides ATP. NADH is also produced.3. In aerobic organisms, glycolysis yields precursors to the Krebs Cycle & Electron Transport System
How many intermediates are bisphosphorylated
When an end product of a reaction is in excess and inhibits the first enzyme of the pathway, this is an example of positive feedback. True False
where does the light dependent reaction take place
Reduction is the loss of electrons. True False
what is energy stored in cells as?
Products of light dependent reactants
Phagocytosis is a process that cells primarily use to obtain nutrients. True False
what do cells replenish their energy with?
Reduction is the gain of electrons. True False
Which of the following is incorrect about turgor pressure? A. It occurs in an organism with cell walls when placed into a hypertonic environment. B. It is necessary to keep plants from wilting. C. It is the force of water against the inside of the cell wall. D. It is maintained by osmosis. E. It occurs in an organism with cell walls when placed into a hypotonic environment.
Your liver produces 90% of the cholesterol found in your body. When cholesterol levels get too high, the first enzyme in the pathway of cholesterol synthesis is inhibited. This is an example of A. positive feedback. B. denaturation. C. equilibrium. D. negative feedback. E. a coenzyme.
A reason that some antibiotics harm bacteria, but not humans, is because the antibiotic inhibits bacterial enzymes that humans do not have. True False