Question 1

For every 2 turns of the Krebs Cycle (or Citric Acid Cycle) the following number of ATP molecules is generated from NADH:

Accepted Answer

A)  22 ATP 
B)  12 ATP 
C)  19 ATP 
D)  9 ATP 
E)  24 ATP 
A)  22 ATP 
B)  12 ATP 
C)  19 ATP 
D)  9 ATP 
E)  24 ATP E

Question 2

Doubling the speed of an enzymatic reaction by increasing the temperature by 10 degrees C is referred to as the ___________________.

Accepted Answer

Q10 effect

Question 3

NAD must be reduced to NADH in the pyruvate to lactate biochemical step in order to keep anaerobic glycolysis running.

Accepted Answer

A) True 
 B)False  False

Question 4

What energy system would primarily be used when performing a pole vault?

Accepted Answer

A)  phosphocreatine system 
B)  glycolytic system 
C)  aerobic system 
D)  all energy systems are contributing equally 
A)  phosphocreatine system 
B)  glycolytic system 
C)  aerobic system 
D)  all energy systems are contributing equally

Question 5

All of the following are characteristics of the Creatine Phosphate Bioenergetic System except:

Accepted Answer

A)  1 PCr = 3 ATP 
B)  short-term (5-10 seconds) 
C)  high-energy phosphates 
D)  1 PCr = 1 ATP 
E)  buffers H+ 
A)  1 PCr = 3 ATP 
B)  short-term (5-10 seconds) 
C)  high-energy phosphates 
D)  1 PCr = 1 ATP 
E)  buffers H+

Question 6

During high-intensity exercise, the ___________________decreases in the muscle cell thus contributing to the onset of muscular fatigue.

Accepted Answer

The answer of During high-intensity exercise, the ___________________decreases in the...

Question 7

During high-intensity exercise an increase in ADP concentration in the muscle cell stimulates the rate-limiting enzyme __________________.

Accepted Answer

The answer of During high-intensity exercise an increase in ADP...

Question 8

During high-intensity exercise, lactate production is greater than lactate removal and contributes to the observed lactate threshold (LT) observed on graph paper.

Accepted Answer

A) True 
 B)False

Question 9

Rate limiting enzymes in bioenergetic pathways play an integral role in controlling the rate of energy yielding pathways.

Accepted Answer

A) True 
 B)False

Question 10

What energy systems are being used predominately during a 6.2 mile race (10K)?

Accepted Answer

Throughout the race oxidative phosphoryl

Question 11

Which of the following factors does NOT influence enzyme activity?

Accepted Answer

A)  temperature 
B)  pH 
C)  increased H+ 
D)  specificity 
A)  temperature 
B)  pH 
C)  increased H+ 
D)  specificity

Question 12

How many ATP molecules are generated from 1 molecule of glucose in glycolysis?

Accepted Answer

A)  4 ATP 
B)  2.5 ATP 
C)  2 ATP 
D)  3 ATP 
A)  4 ATP 
B)  2.5 ATP 
C)  2 ATP 
D)  3 ATP

Question 13

The __________________________ is considered an energy barrier that must be overcome for a chemical reaction to occur.

Accepted Answer

energy of

Question 14

When pyruvate enters the mitochondria, it becomes which of the following:

Accepted Answer

A)  Oxaloacetate 
B)  Pyruvate carboxylase 
C)  Malate 
D)  Acetyl CoA 
A)  Oxaloacetate 
B)  Pyruvate carboxylase 
C)  Malate 
D)  Acetyl CoA

Question 15

Which biochemical reaction provides energy for 5-10 seconds of sustained muscular contraction?

Accepted Answer

A)  ATP + H2O$\rightarrow$
ADP + Pi + Energy 
B)  AMP + PCr +H+$\rightarrow$
 ATP + Cr 
C)  PCr + ADP +H+ $\rightarrow$
 ATP + Cr 
D)  ATP + Pi$\rightarrow$
ADP + Cr 
A)  ATP + H2O$\rightarrow$
ADP + Pi + Energy 
B)  AMP + PCr +H+$\rightarrow$
 ATP + Cr 
C)  PCr + ADP +H+ $\rightarrow$
 ATP + Cr 
D)  ATP + Pi$\rightarrow$
ADP + Cr

Question 16

The two turns of the Krebs Cycle are derived from:

Accepted Answer

A)  2 lactate molecules 
B)  hydrogen Ion Production 
C)  accelerated glycolysis 
D)  2 Pyruvates 
A)  2 lactate molecules 
B)  hydrogen Ion Production 
C)  accelerated glycolysis 
D)  2 Pyruvates

Question 17

During high-intensity exercise (e.g., 800 meter run) which enzyme or enzymes are responsible for regulating the anaerobic glycolytic pathway?

Accepted Answer

A)  Cytochrome oxidase 
B)  LDH 
C)  PFK 
D)  PFK and PFK-1 
A)  Cytochrome oxidase 
B)  LDH 
C)  PFK 
D)  PFK and PFK-1

Question 18

When ATP is broken down within the muscle cells and energy is released from the chemical bonds, this process is illustrative of a/an:

Accepted Answer

A)  endergonic reaction 
B)  enthalapy 
C)  Gibbs free energy 
D)  exergonic reaction 
A)  endergonic reaction 
B)  enthalapy 
C)  Gibbs free energy 
D)  exergonic reaction

Question 19

For every two turns of the Kreb's Cycle, how many ATP molecules are generated from FADH?

Accepted Answer

A)  5 ATP 
B)  5.5 ATP 
C)  4 ATP 
D)  3.5 ATP 
A)  5 ATP 
B)  5.5 ATP 
C)  4 ATP 
D)  3.5 ATP

Question 20

What are the primary characteristics of the glycolytic system?

Accepted Answer

There are eighteen chemical reactions, s

Exam 1: Bioenergetics

For every 2 turns of the Krebs Cycle (or Citric Acid Cycle) the following number of ATP molecules is generated from NADH:

Doubling the speed of an enzymatic reaction by increasing the temperature by 10 degrees C is referred to as the ___________________.

NAD must be reduced to NADH in the pyruvate to lactate biochemical step in order to keep anaerobic glycolysis running.

What energy system would primarily be used when performing a pole vault?

All of the following are characteristics of the Creatine Phosphate Bioenergetic System except:

During high-intensity exercise, the ___________________decreases in the muscle cell thus contributing to the onset of muscular fatigue.

During high-intensity exercise an increase in ADP concentration in the muscle cell stimulates the rate-limiting enzyme __________________.

During high-intensity exercise, lactate production is greater than lactate removal and contributes to the observed lactate threshold (LT) observed on graph paper.

Rate limiting enzymes in bioenergetic pathways play an integral role in controlling the rate of energy yielding pathways.

What energy systems are being used predominately during a 6.2 mile race (10K)?

Which of the following factors does NOT influence enzyme activity?

How many ATP molecules are generated from 1 molecule of glucose in glycolysis?

The __________________________ is considered an energy barrier that must be overcome for a chemical reaction to occur.

When pyruvate enters the mitochondria, it becomes which of the following:

Which biochemical reaction provides energy for 5-10 seconds of sustained muscular contraction?

The two turns of the Krebs Cycle are derived from:

During high-intensity exercise (e.g., 800 meter run) which enzyme or enzymes are responsible for regulating the anaerobic glycolytic pathway?

When ATP is broken down within the muscle cells and energy is released from the chemical bonds, this process is illustrative of a/an:

For every two turns of the Kreb's Cycle, how many ATP molecules are generated from FADH?

What are the primary characteristics of the glycolytic system?

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