Test Three - Phys of Ex

The enzyme that catalyzes the formation of lactate from pyruvate is

• lactate dehydrogenase

• lactate kinase

• lactate hydrolase

• pyruvate kinase

Enzymes called kinases are responsible for

• removing electrons from substrates.

• adding hydrogens to substrates.

• adding phosphate groups (i.e., phosphorylation of substrates).

• transferring protons from one molecule to another.

The rate limiting enzyme in glycolysis is

• lactate dehydrogenase.

• hexokinase

• phosphofructokinase.

• pyruvate kinase.

Aerobic production of ATP occurs in the

• mitochondria in a process called glycolysis.

• mitochondria in a process called oxidative phosphorylation.

• mitochondria in a process called beta oxidation.

• cytoplasm

Tags

NGSS.HS-LS1-7

A high level of ________ in the muscle fiber would slow glycolysis by inhibiting its rate limiting enzyme.

• ADP

• ATP

• 
  P _i

• 
  none of these answers is correct

The process of beta-oxidation involves

• breaking down stored triglycerides to FFA.

• the addition of oxygen to a fatty acid.

• the breakdown of a fatty acid to acetyl-CoA.

• none of these

Rate limiting enzymes are often located

• near the beginning of a metabolic pathway.

• near the end of a metabolic pathway.

• outside of the main metabolic pathway.

• None of these answers is correct.

The metabolic process of converting foodstuffs into a biological usable form of energy is called

• bioenergetics.

• metabolism.

• glycolysis.

• coupled reactions.

Tags

NGSS.HS-LS1-7

If muscle glycogen is the initial substrate, the net production of ATP resulting during glycolysis is

• 2 molecules

• 3 molecules

• 32 molecules

• 33 molecules

Elevated blood levels of lactate dehydrogenase can assist in the diagnosis of which medical condition?

• paget's disease

• pancreatitis

• muscular dystrophy

• myocardial infarction