Chapter 5 Part 2 McDermott

In __________ an end-product of an anabolic pathway inhibits the activity of one or more enzymes in a pathway.

• Positive feedback

• Feedback inhibition

• Inhibition

• Negative feedback

Which of the following influence the rate at which enzymes function? (select all that apply)

• Amount of substrate

• Presence of inhibitors

• Temperature

• pH

At the completion of the Kreb’s cycle, the carbons from glucose are found in __________.

• NADH

• CO2

• Pyruvic acid

• FADH2

One of the sites of allosteric regulation of the Kreb’s cycle is the conversion of pyruvic acid to acetyl CoA. Which of the following conditions would you expect to inhibit the conversion of pyruvic acid to acetyl CoA?

• Low ATP and low NADH

• High ATP and high NADH

• High ADP and low NADH

• High ATP and low NADH

• Low ATP and high NADH

Which of the following would you predict to be a feedback inhibitor of the glycolytic enzyme phosphofructokinase?

• FAD

• ADP

• NAD+

• Fructose

• ATP

Correctly match the organisms group with the correct term that describe them

• CO2

• photoheterotroph

• Light

• photoautotroph

• Organic compound

• chemoheterotroph

• Chemical energy

• chemoautotroph

An organism uses glucose as energy source and respires O2. This organism is known as a(n) (a)  

• Photoheterotroph

• Chemoautotroph

• Photooautotroph
• chemoheterotroph

Which of the following best describes metabolism?

• A set of chemical reactions that occur in a cell

• The breakdown of glucose only

• A process exclusive to eukaryotic cells

• The production of ATP exclusively in the mitochondria

What is the primary function of catabolism?

• To use energy to build complex molecules

• To break down molecules and release energy

• To transport molecules across membranes

• To store ATP

In an anabolic reaction, which of the following occurs?

• Large molecules are broken down

• ATP is used to build complex molecules

• Oxygen is always required

• Water is produced as a byproduct