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Biology 101 Exam 2 Questions and Answers
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Biology 101 Exam 2 Questions and Answers
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Biology 101 Exam 2 Questions andAnswers
Which organelles are part of the endomembrane system? - Answer-- Rough
Endoplasmic Reticulum
- Smooth Endoplasmic Reticulum
- Golgi Apparatus
- Lysosomes
- Vacuoles
- Plasma Membrane
What are the three major differences between a plant cell and an animal cell? - Answer-
1. Plants have chloroplasts, animals don't
2. Plants have a cell wall, animals don't
3. Plants have a large central vacuole, animals don't
What are the two laws of thermodynamics? - Answer-1. Energy can be transferred or
transformed but can NOT be created or destroyed
2. every energy transfer makes the universe more disordered
What is the structure of ATP? - Answer-3 unstable phosphate bonds linked to a ribose
on the 5th carbon that is linked to an adenine on the 3rd carbon
How is ATP used to do work in the cell? - Answer-it releases a phosphate which is then
transferred to another molecule and causes that molecule to become energized
What is in allosteric enzyme? - Answer-An enzyme that contains allosteric sites and is
complex, with more than one subunit
How do allosteric activators and inhibitors control the activity of allosteric enzymes? -
Answer-Both activators and inhibitors stabilize the enzyme, with activators increasing
activity and inhibitors decreasing activity
In what ways can an enzyme be regulated? - Answer-- environmental conditions
- inorganic cofactors
- organic coenzymes
- substrate concentration
- enzyme inhibitors (competitive & noncompetitive)
- allosteric regulation
What is the difference between reduction and oxidation? - Answer-Reduction is a gain
of electrons and oxidation is a loss of electrons
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