What stage of cellular respiration can occur in human cells with or without oxygen present?
A. the Krebs cycle
B. the electron transport chain
C. glycolysis
D. pyruvate oxidation
Answer: C
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Why is it a good idea for a bacterial cell to be able to utilize glucose FIRST as an energy source (until it's used up), THEN switch to lactose?
A. Glucose is an easier compound to break down and obtain energy from than lactose. B. Lactose cannot be used by bacterial cells as an energy source. C. It's about conservation of energy-why expend the energy to make the extra enzymes for breaking down lactose when glucose is right there and doesn't need the extra enzymes for breakdown. D. Glucose provides 10x as much energy when broken down as lactose. E. Glucose is no easier compound to break down and obtain energy from than lactose AND It's about conservation of energy-why expend the energy to make the extra enzymes for breaking down lactose when glucose is right there and doesn't need the extra enzymes for breakdown.
Which molecule in the Calvin cycle is used to synthesize starch and sucrose?
A) 3-phosphoglycerate B) glyceraldehyde-3-phosphate C) ribulose-1,5-bisphosphate D) 1,3-bisphosphoglycerate E) ribulose-5-phosphate
A red blood cell has lost its nucleus to make more space for carrying oxygen. This is an example of ________
A) a prokaryotic cell B) a cell that is not living C) the relationship between structure and function D) a cell whose DNA is circular
In cells, endergonic reactions are often coupled with exergonic reactions that store energy
Indicate whether the statement is true or false