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Biology 207 Exam 2 Questions And Answers Latest Update
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Biology 207 Exam 2 Questions And Answers Latest Update
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2024/2025Biology 207 Exam 2 Questions
And Answers Latest Update
Cells ANS✔✔ The units of life
What are the 3 groups of life? ANS✔✔ - Bacteria
- Archaea
- Eukarya
Exergonic reaction ANS✔✔ pathways release energy by breaking down complex molecules from
simpler compounds
Endergonic reaction ANS✔✔ pathways consume energy to build complex molecules from simple
ones
Redox reaction ANS✔✔ reactions involving a transfer of electrons between 2 molecules
What happens to something that is reduced? ANS✔✔ Oxidation is the loss of electrons
What molecules are involved in transferring energy generated in an exergonic reaction to power an
endergonic reaction? ANS✔✔
Activation energy ANS✔✔ the energy necessary to reach the transition state
How is activation energy overcome? ANS✔✔ supplied by heat from its surroundings
Enzyme ANS✔✔ speed biochemical reactions
, 2024/2025
How does an Enzyme function? ANS✔✔ they speed reactions by lowering the activation energy
How does an Enzyme change a reaction's free energy diagram? ANS✔✔
What are three ways that enzyme activity can be controlled? ANS✔✔ - orienting substates
correctly
- straining substate bonds
- providing a favorable microenvironment
What are the effects of changes in temperature and pH on enzyme function? ANS✔✔ their
hydrogen bonds can break which causes the enzymes to unravel (denature)
Diffusion ANS✔✔ the tendency for molecules to spread out evenly into available space
what type of molecules can diffuse across the call membrane? ANS✔✔ non polar
- carbon dioxide, oxygen, H2O
Facilitated diffusion ANS✔✔ requires the assistance of membrane proteins (polar molecules)
How do you know which way a molecule will diffuse? ANS✔✔
What are the effects of tonicity on cells? ANS✔✔ - Isotonic
- Hypertonic
- Hypotonic
Isotonic ANS✔✔ solute concentration is the same as the other side of the membrane
Hypertonic ANS✔✔ solute concentration is greater than the other side of the membrane
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