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Microbiology Exam 2 chapters 7-11 Questions and Answers (100% Pass)
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Microbiology Exam 2 chapters 7-11 Questions and Answers (100% Pass)
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©PREP4EXAMS @2024 [REAL EXAM DUMPS] Wednesday, July 17, 2024 1:27 AMMicrobiology Exam 2 chapters 7-11
Questions and Answers (100% Pass)
sum of all chemical reactions in an organism (catabolism + anabolism) - ✔️✔️Metabolism
Provides energy and building blocks for anabolism, breaks things down to release energy -
✔️✔️Catabolism
uses energy/ harnesses it and building blocks to build large molecules - ✔️✔️Anabolism
The amount of energy required for the reaction to start - ✔️✔️Activation energy
They reduce the activation energy , which allows for the reaction to go to completion quickly
enough to sustain life - ✔️✔️Enzymes
In biological systems if there were no _____ then chemical reactions would not go to
completion quickly enough and life would not exist - ✔️✔️Enzymes
Role of ATP in Coupling Reactions - ✔️✔️Example: new tissues , cells , or proteins
Break down more complex molecules like starch and proteins , releasing ATP - ✔️✔️Catabolic
reactions
Catalysts that increase the rate of chemical reactions - ✔️✔️Enzymes
Catalyzing the chemical reactions of life - ✔️✔️Step 2: enzymes will help this substrate
become product
Step 4: products are released
True or false: enzymes are 3 dimensional tertiary structures - ✔️✔️True
The site where the substrate will bind - ✔️✔️Active site
True or false : there are usually multiple steps that will utilize more than one enzyme to make
the final product - ✔️✔️True
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, ©PREP4EXAMS @2024 [REAL EXAM DUMPS] Wednesday, July 17, 2024 1:27 AM
Term stating that enzymes (proteins) have to have a very specific structure to function
properly - ✔️✔️Form fits function
Two factors that can denature proteins are _____ and ______ - ✔️✔️Temperature and pH
What is the effect of temperature on enzyme activity - ✔️✔️Initially temperature increase the
rate of the reaction, but eventually the temp will be so high that it causes those enzymes to
missfold or unfold and they will no longer function properly , the rate of reaction will drop
Effect of pH on enzyme activity - ✔️✔️All enzymes work best at optimal pH. above and below
the optimal pH the rate of reaction decreases. Extreme pH changes can denature the enzyme
Where the drug or the antibiotic will bind to the active site of the enzyme which blocks the
substrate from being able to attach - ✔️✔️Competitive inhibition
Where the drug or antibiotic is binding to the allosteric site , this will cause the entire protein
to change shape so that the active site will no longer allow the substrate to fit - ✔️✔️Non
competitive inhibition
competitive vs noncompetitive inhibitors - ✔️✔️
Enzyme inhibitors: feedback inhibition - ✔️✔️Biochemical pathway , saves energy , if you
have plenty of product the excess can feedback and attach to the 1st enzyme in that
biochemical pathway shutting everything down
When there no longer excess the cycle turn back on
The oxidation of glucose to pyruvic acid produced ATP and NADH - ✔️✔️Glycolysis
pyruvic acid (from glycolysis) is oxidized and decarboyxlated , gain coenzyme A and will
make 2 NADH - ✔️✔️Transmission/ intermediate step
Harvest electrons, each acetylene CoA yields 1 GTP, 3 NADH, 1 FADH, and 2 Co2
molecules
Total yield : per 2 acetyl CoA's : Co2: 4
Energy: 2 GTP, 6 NADH, 2 FADH - ✔️✔️Krebs cycle / citric acid cycle
A series of carrier molecules that are in turn reduced and oxidized as electrons are passed
down the chain
Energy released from the movement of these electrons can be used to fuel the proton pump
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