Portage Learning| BIOL271 Microbiology Lab 6 Exams
All Versions; Latest Questions With Verified Answers
Institution: Portage Learning
Course Code: BIOL271
Course Title: Microbiology w/ Lab
Exam: Lab 6 Exams
Topic: Enzymatic Reactions
Edition: Updated Version
Student Name: _______________________________
Student Id: _________________________________
Instructor: _________________________________
Instructions:
• Answer All Questions.
• Choose The Correct Answer
QUESTIONS TYPE:
➢ Multiple Choice:
➢ True Or False:
➢ Explain/Describe/ Identification
➢ Fill In The Blank
➢ Short Answer
All The Best!!
, Enzymatic reactions
1. What Are Enzymes?
A. Biological Molecules That Provide Energy For Cells
B. Biological Catalysts That Speed Up Chemical Reactions Without Being Used Up Or
Altered
C. Substances That Stop All Chemical Reactions
D. Proteins That Are Permanently Changed During Chemical Reactions
ANS. B.
Explanation: Enzymes Function As Biological Catalysts And Accelerate Reactions
Without Being Consumed Or Permanently Altered.
2. How Do Catalysts Speed Up Chemical Reactions?
A. By Increasing The Temperature Of The Reaction
B. By Increasing The Amount Of Substrate
C. By Lowering The Activation Energy Of Chemical Reactions
D. By Changing The Final Products Of The Reaction
ANS. C.
Explanation: Catalysts Make Reactions Occur More Readily By Lowering The
Activation Energy Required For The Reaction.
3. The Amount Of Energy Required For A Chemical Reaction To Proceed Is Called?
A. Substrate Energy
B. Activation Energy
C. Enzyme Energy
D. Chemical Energy
ANS. B.
Explanation: Activation Energy Is The Energy Required For A Chemical Reaction To
Proceed.
,4. What Is A Substance Called That An Enzyme Acts Upon?
A. Catalyst
B. Product
C. Substrate
D. Activator
ANS. C.
Explanation: A Substrate Is The Substance Upon Which An Enzyme Acts During An
Enzymatic Reaction.
5. What Is The Effect Of Very High Temperature On Enzyme Activity?
A. The Heat Will Increase Enzyme Activity Permanently.
B. The Heat Will Stop Chemical Activity Of An Enzyme Because Heat Will Denature
The Protein.
C. The Heat Will Convert The Enzyme Into A Substrate.
D. The Heat Will Have No Effect On Enzyme Activity.
ANS. B.
Explanation: Very High Temperatures Can Denature Enzyme Proteins, Causing Them
To Lose Their Functional Structure And Activity.
6. What Is The Effect Of A Ph Change On Enzyme Activity?
The Only Ph Which Effects Enzymes Is _____ Because It Denatures The Protein.
A. 5
B. 6
C. 7
D. 9
ANS. C.
Explanation: The Provided Answer States That The Ph Which Effects Enzymes Is 7
Because It Denatures The Protein.
7. Answer The Following.
, An Unknown Bacterium (Sample B) Was Tested Using Several Of The Rapid,
Qualitative Tests Described Within This Lab Lecture. Using The Images Of The Results
Below Indicate The Lab Results For Each Test (1–3) As Either Positive Or Negative,
Then Using The Decision Tree Identify The Unknown Bacterium By The Corresponding
Letter.
The Unknown Sample Is:
ANS.
Test 1. Oxidase-Negative (Anaerobic)
Test 2. Catalase Positive And
Test 3. Coagulase-Positive,
Which On The Decision Tree, Corresponds With The Letter O.
Explanation: Test 1 Is Oxidase-Negative (Anaerobic), Test 2 Is Catalase Positive, And
Test 3 Is Coagulase-Positive. These Results Correspond With The Letter O On The
Decision Tree.
8. Why Do Mashed Potatoes Stay White No Matter How Long They Sit Around?
All Versions; Latest Questions With Verified Answers
Institution: Portage Learning
Course Code: BIOL271
Course Title: Microbiology w/ Lab
Exam: Lab 6 Exams
Topic: Enzymatic Reactions
Edition: Updated Version
Student Name: _______________________________
Student Id: _________________________________
Instructor: _________________________________
Instructions:
• Answer All Questions.
• Choose The Correct Answer
QUESTIONS TYPE:
➢ Multiple Choice:
➢ True Or False:
➢ Explain/Describe/ Identification
➢ Fill In The Blank
➢ Short Answer
All The Best!!
, Enzymatic reactions
1. What Are Enzymes?
A. Biological Molecules That Provide Energy For Cells
B. Biological Catalysts That Speed Up Chemical Reactions Without Being Used Up Or
Altered
C. Substances That Stop All Chemical Reactions
D. Proteins That Are Permanently Changed During Chemical Reactions
ANS. B.
Explanation: Enzymes Function As Biological Catalysts And Accelerate Reactions
Without Being Consumed Or Permanently Altered.
2. How Do Catalysts Speed Up Chemical Reactions?
A. By Increasing The Temperature Of The Reaction
B. By Increasing The Amount Of Substrate
C. By Lowering The Activation Energy Of Chemical Reactions
D. By Changing The Final Products Of The Reaction
ANS. C.
Explanation: Catalysts Make Reactions Occur More Readily By Lowering The
Activation Energy Required For The Reaction.
3. The Amount Of Energy Required For A Chemical Reaction To Proceed Is Called?
A. Substrate Energy
B. Activation Energy
C. Enzyme Energy
D. Chemical Energy
ANS. B.
Explanation: Activation Energy Is The Energy Required For A Chemical Reaction To
Proceed.
,4. What Is A Substance Called That An Enzyme Acts Upon?
A. Catalyst
B. Product
C. Substrate
D. Activator
ANS. C.
Explanation: A Substrate Is The Substance Upon Which An Enzyme Acts During An
Enzymatic Reaction.
5. What Is The Effect Of Very High Temperature On Enzyme Activity?
A. The Heat Will Increase Enzyme Activity Permanently.
B. The Heat Will Stop Chemical Activity Of An Enzyme Because Heat Will Denature
The Protein.
C. The Heat Will Convert The Enzyme Into A Substrate.
D. The Heat Will Have No Effect On Enzyme Activity.
ANS. B.
Explanation: Very High Temperatures Can Denature Enzyme Proteins, Causing Them
To Lose Their Functional Structure And Activity.
6. What Is The Effect Of A Ph Change On Enzyme Activity?
The Only Ph Which Effects Enzymes Is _____ Because It Denatures The Protein.
A. 5
B. 6
C. 7
D. 9
ANS. C.
Explanation: The Provided Answer States That The Ph Which Effects Enzymes Is 7
Because It Denatures The Protein.
7. Answer The Following.
, An Unknown Bacterium (Sample B) Was Tested Using Several Of The Rapid,
Qualitative Tests Described Within This Lab Lecture. Using The Images Of The Results
Below Indicate The Lab Results For Each Test (1–3) As Either Positive Or Negative,
Then Using The Decision Tree Identify The Unknown Bacterium By The Corresponding
Letter.
The Unknown Sample Is:
ANS.
Test 1. Oxidase-Negative (Anaerobic)
Test 2. Catalase Positive And
Test 3. Coagulase-Positive,
Which On The Decision Tree, Corresponds With The Letter O.
Explanation: Test 1 Is Oxidase-Negative (Anaerobic), Test 2 Is Catalase Positive, And
Test 3 Is Coagulase-Positive. These Results Correspond With The Letter O On The
Decision Tree.
8. Why Do Mashed Potatoes Stay White No Matter How Long They Sit Around?
