PCB 3023 Exam 1 questions with answers

PCB 3023 Exam 1 questions with answers
|\ |\ |\ |\ |\ |\




A reaction occurs spontaneously only if the change in free energy
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\


(ΔG) is
|\ |\




negative




Which of the following are required for glycolysis to take place?
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\




NAD+, Pi, ADP, ATP |\ |\ |\




The free-energy change, ΔG, for the chemical reaction A → B is 0
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


kJ/mole at 37°C when the concentrations of A and B are 10 M and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


0.1 M, respectively. What is the free-energy change for the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


reaction when the concentrations of A and B are 0.01 M and 1 M,
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


respectively?
|\




+23.76 kJ/mole |\




Which part of the mitochondrion contains porins?
|\ |\ |\ |\ |\ |\




outer membrane |\

,What is true of the organelles that produce ATP in eukaryotic
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


animal cells? |\




They evolved from bacteria engulfed by ancestral cells billions of
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\


years ago. |\




Which of the following is true for eukaryotic cells?
|\ |\ |\ |\ |\ |\ |\ |\




- Fats are converted to acetyl CoA in the mitochondria; sugars
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


are converted to acetyl CoA in the cytosol
|\ |\ |\ |\ |\ |\ |\




- Sugars are converted to acetyl CoA, but fats are not
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\




- Fats are converted to acetyl CoA, but sugars are not
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\




- Sugars and fats are both converted to acetyl CoA in the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


mitochondria
- Sugars are converted to acetyl CoA in the mitochondria; fats are
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


converted to acetyl CoA in the cytosol
|\ |\ |\ |\ |\ |\ |\




Sugars and fats are both converted to acetyl CoA in the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


mitochondria.




For some biosynthetic reactions, such as the synthesis of nucleic
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\


acids, the energy supplied by the hydrolysis of ATP to ADP and Pi
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


is insufficient to drive the reaction forward. How can such
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\


reactions occur inside cells? |\ |\ |\

, ATP is hydrolyzed to AMP and Pi in two successive hydrolysis
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


reactions.




Which of the following statements are true of mitochondria?
|\ |\ |\ |\ |\ |\ |\ |\




- In plant cells, they are replaced by chloroplasts
|\ |\ |\ |\ |\ |\ |\ |\




- Inside a cell, they are mobile, constantly changing shape and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


position
- They contain an outer membrane, an inner membrane, and two
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\


internal compartments
|\ |\




- They are similar in size and shape to bacteria
|\ |\ |\ |\ |\ |\ |\ |\ |\




- They contain their own DNA and RNA
|\ |\ |\ |\ |\ |\ |\




- Inside a cell, they are mobile, constantly changing shape and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


position
- They contain an outer membrane, an inner membrane, and two
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\


internal compartments
|\ |\




- They are similar in size and shape to bacteria
|\ |\ |\ |\ |\ |\ |\ |\ |\




- They contain their own DNA and RNA
|\ |\ |\ |\ |\ |\ |\




The synthesis of ATP in glycolysis occurs by which process?
|\ |\ |\ |\ |\ |\ |\ |\ |\




substrate-level phosphorylation |\