Section 3 Quizzes

Question 1

In animals, the formula for cell respiration is?

Answer 1

food + O2 —> CO2 + H2O + Energy

Question 2

The four stages of metabolism and ATP production in order (1-4) include:

Answer 2

digestion, acetyl-CoA production, citric acid cycle, ATP production

Question 3

How many ATP are directly produced from a single Citric Acid Cycle?

Answer 3

1

Question 4

How many reduced coenzymes are produced from the two carbons introduced into one round of the citric acid cycle?

Answer 4

4

Question 5

Which Reaction is exergonic?
A. Hydrolysis of ATP
B. Hydrolysis of Acetyl-CoA
C. None
D. Both

Answer 5

D. both

Question 6

What is the effect of increased levels of hydrogen ions in the intermembrane space of the mitochondria?

Answer 6

increased ATP production

Question 7

What powers the ATP synthase rotary motor?

Answer 7

hydrogen ion gradient

Question 8

All of the chemical reactions that occur in the body are collectively known as __________.

Answer 8

metabolism

Question 9

How many complexes are used in the electron transport chain?

Answer 9

4

Question 10

definition of glycolysis

Answer 10

conversion of glucose to pyruvate

Question 11

definition of gluconeogenesis

Answer 11

synthesis of glucose from noncarbohydrates

Question 12

definition of glycogenesis

Answer 12

synthesis of glycogen from glucose

Question 13

definition of glycogenolysis

Answer 13

breakdown of glycogen to glucose

Question 14

When glucose enters a cell from the bloodstream, it is immediately converted to:

Answer 14

glucose-6-phosphate

Question 15

Digestion involves enzyme-catalyzed hydrolysis of carbohydrates, proteins, and fats. Which of the following is an enzyme found in saliva?

Answer 15

alpha-amylase

Question 16

The three carbon end product of glycolysis is?

Answer 16

pyruvate

Question 17

The net energy result of glycolysis is the production of:

Answer 17

2 ATP, 2 NADH/H+

Question 18

The body uses the hormones ______________ and _________________ to control blood glucose levels along with mechanisms to store and release glucose as needed.

Answer 18

glucagon and insulin

Question 19

What is a risk factor for diabetes Type II?
A. high cholesterol diet
B. smoking
C. all of these
D. high blood pressure

Answer 19

C. all of these

Question 20

____________________________ is an autoimmune disease, in which the body misidentifies some part of itself (islet cells) as an invader resulting in inability of pancreas to make insulin.

Answer 20

diabetes type I

Question 21

Hypoglycemia may be defined as:

Answer 21

Lower than normal blood glucose concentration

Question 22

What is the name of this type of lipid?
(glycerol backbone and 3 fatty acids)

Answer 22

triacylglycerol

Question 23

Cholesterol synthesized in the liver is transported into the bloodstream by _______.

Answer 23

LDLs

Question 24

How many molecules of acetyl-SCoA are produced in the catabolism of stearic acid, CH3(CH2)16CO2H?

Answer 24

9

Question 25

The common intermediate in the breakdown of all classes of food is?

Answer 25

acetyl-coa

Question 26

Metabolism during starvation results in a decrease of all but which of the following?

Answer 26

ketone bodies

Question 27

Which of the following best describes the structure of a biological membrane?

Answer 27

two layers of phospholipids with proteins either crossing the layers or on the surface of the layers

Question 28

Lipids are defined by their solubility in nonpolar solvents, such as diethyl ether. Although there are a great variety of lipid structures, all lipids contain _______.

Answer 28

large hydrocarbon portions and few polar groups

Question 29

Which lipid group is known to support health of our neurons ?

Answer 29

sphingomyelin

Question 30

Roughly what is the ratio of energy from a mole of fatty acids and a mole of glucose?

Answer 30

3

Question 31

What is the term for the catabolic break down of fatty acids?

Answer 31

Beta-oxidation