HSCI Exam 1 study guide

How is glucose stored and why is it stored that way?

• Stored as glycogen, saves space, doesn't have as much influence on osmotic flux compared to glucose

• stored as glucagon. so it is ready to break down glycogen

• stored as glucose in our cell membranes. this is so cells have a quick source of energy.

• Stored as alanine. This is because we are resting, and do not need to use it.

Where are the NADs in glycolysis coming from?

• The electron transport chain

• The Krebs cycle

• From the conversion of pyruvate to lactate

• From the Endoplasmic reticulum

What are the precursors to acetyl Coa?

• pyruvate and glycogen

• glycogen and lactate

• fatty acids and Co2

• pyruvate and fatty acids

Sam holds his breath for an impossibly long length of time. What kind of effect would this have on his enzymes?

• Would increase the efficiency of his enzymes by up regulating their production

• Would inhibit/denature them due to a lowering in pH

• Would inhibit/denature them due to a raise in pH

• Would inhibit/denature them due to lowering the alkalinity

You lay in your bed for hours upon hours consuming large amounts of fries and sugary soda for your week off. What process is mainly taking place to the glucose being consumed?

• glycogenesis

• gluconeogenesis

• glycogenolysis

• lactic acid fermentation

Where does glycolysis take place? Does it need oxygen?

• cytosol, no

• inter-membrane matrix, no

• Matrix of the mitochondria, yes

• outside of the cell, no

Our Krebs cycle has stopped working. Why would this mainly have such a huge effect on the ETC?

• CO2 buildup would occur and would halt our ETC

• No O2 being brought into the ETC

• No FADHS or NADHs to funnel into the ETC

• No effect; our ETC functions independently of the Krebs cycle

Where is ATP produced throughout the glycolysis-Krebs-oxidative phosphorylation pathway?

• 2 net from glycolysis, 4 from Krebs, 28 from ETC

• 0 net from glycolysis, 2 from Krebs, 28 from ETC

• 4 net from glycolysis, 1 from Krebs, up to 34 from ETC

• 2 net from glycolysis, 2 from Krebs, up to 34 from ETC

If the weight of pyruvate is 88, what is the molecular weight of lactate?

• 86 daltons

• 90 daltons

• 90 frisch-hertz

• 90 joules

What is a rate limiting enzyme and which enzyme in glycolysis can be considered one?

• hexokinase- a rate limiting enzyme is the slowest reaction of the bunch.

• hexokinase- a rate limiting enzyme is the fastest reaction of the bunch

• Glucokinase-a rate limiting enzyme is the slowest enzyme of the bunch

• phosphofructokinase-a rate limiting enzyme is the slowest reaction of the bunch