• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

Card Range To Study

through

image

Play button

image

Play button

image

Progress

1/20

Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

20 Cards in this Set

  • Front
  • Back
Which of the following is NOT an activator of steps of glycolysis?
Ac-CoA
Moles which signal high cellular energy_____ glycolysis, whereas molecules which signal low cellular energy _____ glycolysis
(High energy) inhibit; (low energy) activate
Under cellular conditions, _____ steps of glycolysis have deltaG-actual = 0, meaning that they are at equilibrim
7, step 1 short plateau step 2, long plateau 4-9, Downhill step = 1,3,10
ATP is an immediate substrate in step 3 of glycolysis: F6P + ATP -> 1,6FBP + ADP. it also is a "long-range" ___ of that step
product (and therefore feedback inhibitor)
In Phosphofructokinase, ATP binds...
Strongly to a C site & weakly to regulatory site
The carbohydrates sucrose, lactose, mannose, glucose, and fructose all feed into reaction #2 or #3 of glycolysis because they all consist of...
hexoses
Many carbs feed into one of the components of the glycolysis series...
F6P
Synthesis of glucose-6-phosphate from glucose (Pi + Glc -> G6P) with nothing else involved is ___ . It is coupled to the reaction ___ , and the combination is favorable.
Unfavorable; ATP & H2O-> ADP +Pi
Which of the following is not AN INHIBITOR OF STEPS OF GLYCOLYSIS?
Pi
In the list below, the phosphate releasing reaction with the least favorable delta-G-nult is ___ .
G6P -> Glc + Pi
In the list below, the phosphate releasing reaction with the most favorable delta-G-nult is ___ .
PEP -> pyruvate + Pi
The most highly regulated step of glycolysis is step 3, since many hexoses feed into...
F6P -> reactant of step 3
The regulated steps of glycolysis have a delta-G-actual value which is...
Strongly negative
The enzyme kinetics curve for phosphofructokinase shows a peak at intermediate [ATP]. ATP binds as a substrate to a catalytic site and as an inhibitor to a regulatory site. The tighter binding is to the ___ site.
Catalytic- The tighter (and therefore initial) binding is to the catalytic site, binding ATP as a substrate and leading to faster formation of product. The weaker (and therefore final binding at high [ATP]) is at the regulatory site, shutting down catalysis by long-range allosteric effects.
Phosphofructokinase catalyzes step 3 of glycolysis: F6P+ATP -> 1,6 F6P + ADP. A plot of V-init vs ATP shows a velocity which____ as ATP increases
increases at first and then decreases
Step 10 of glycolysis is PEP + ADP -> ATP + pyr. Synthesis of ATP is an unfavorable factor, but this is paid for by ___ .
enol -> keto tautomerization
Step 6 of glycolysis is G3P(aldehyde) + Pi + (NAD+) -> 1,3BPG(carboylic acid derivative) + NADH. Since NADH has enough energy to make 3 ATP, creation of NADH is highly unfavorable. Synthesis of NADH is paid for by...
oxidation of an aldehyde to a carboxylic acid (derivative)
Step 6 of glycolysis is G3P(aldehyde) + Pi + (NAD+) -> 1,3BPG(carboxyl derivative) + NADH. The unfavorable factor(s) in this reaction include :
Attachment of happy Pi to an organic molecule and formation of NADH
Step 7 of glycolysis is 1,3BPG + ADP -> 3PG + ATP. Synthesis of ATP is an unfavorable factor by this is paid for by...
Creation of a resonance-stabilized ionized COO- group
Of the 10 steps of glycolysis, _____ are also used in gluconeogneeis
7 - The three regulated steps with large negative delta-G-actual values also have large delta-G-nult values. Thus if they were allowed to proceed to equilibrium, they would lie far to the right (glucose -> pyruvate) and would not be appropriate for gluconeogenesis (which requires moving molecules to the left).