Chapter 7 - Chapter 11

Question 1

It is easier for glucose to pass through the plasma membrane unassisted than it is for carbon dioxide. T or F?

Answer 1

False

Question 2

If a K+ channel opens, K+ ions move from inside the cell to outside the cell following the concentration gradient. This is an example of

Answer 2

Facilitated diffusion

Question 3

In class we viewed several slides that displayed a membrane potential. What kind of charge is the resting membrane potential and how is that beneficial to the cell?

Answer 3

A negative internal charge, helps to attract positively charged ions into the cell

Question 4

Bulk transport occurs by

Answer 4

Exocytosis and Endocytosis

Question 5

Exocytosis

Answer 5

Transport vesicles migrate to the membrane, fuse with it, and release their contents

Question 6

Endocytosis

Answer 6

the cell takes in macromolecules by forming vesicles from the plasma membrane

Question 7

3 types of endocytosis

Answer 7

1) Phagocytosis (“cellular eating”)
2) Pinocytosis (“cellular drinking”)
3) Receptor-mediated endocytosis

Question 8

Isotonic solution

Answer 8

Solute concentration is the same as that inside the cell; no net water movement across the plasma membrane

Question 9

Hypertonic solution

Answer 9

Solute concentration is greater than that inside the cell; the cell loses water

Question 10

Hypotonic solution

Answer 10

Solute concentration is less than that inside the cell; cell gains water

Question 11

Membrane potential

Answer 11

the voltage difference across a membrane (all cells)

Question 12

An anabolic pathway uses energy to build products. T or F

Answer 12

True

Question 13

Suppose a cell wanted to run a reaction with delta G = 45.

Which option would allow the reaction to occur?

Selected Answer:
It could be paired with a reaction with delta G = -49

Answers:
It must be paired with a reaction with a delta G of greater than 45

It could be paired with a reaction with delta G = -49

It could be paired with a reaction with delta G = -15

Any of these would work because the original reaction is exergonic and spontaneous.

Answer 13

It could be paired with a reaction with delta G = -49

Question 14

An allosteric inhibitor is noncompetitive because

Answer 14

it binds to a region of the enzyme outside the active site

Question 15

How many NADH does 1 molecule of glucose produce in Glycolysis and the Citric acid cycle combined?

Answer 15

8

Question 16

Glycolysis

Answer 16

inputs: 2ATP, Glucose (6C)
outputs: 4ATP, 2NADH, 2Pyruvate(2C)

Question 17

Citric Acid

Answer 17

inputs: ACoA (2C)
outputs: 2CO2, 3NADH, 1ATP, 1FADH2

Question 18

Pyruvate AGA

Answer 18

inputs: pyruvate (3C)
outputs: ACoA (2C), CO2, NADH

Question 19

The Citric acid cycle occurs in the

Answer 19

Matrix of the mitochondria

Question 20

Why is oxygen an important part of this chapter?

Answer 20

You need oxygen to run the electron transport chain

Question 21

How do fats contribute to energy production?

Answer 21

They can be broken down to produce intermediates for glycolysis and the citric acid cycle

Question 22

Which of the following can turn off glycolysis via feedback inhibition?

Answer 22

ATP and Citrate

Question 23

What is the name of the cycle used to create glucose in plant cells?

Answer 23

Calvin cycle

Question 24

What are the direct products of the light reactions in photosynthesis?

Answer 24

ATP, NADPH, and Oxygen

Question 25

Identify one similarity between mitochondria and chloroplasts.

Answer 25

They both use internal membranes to create H+ gradients

Question 26

How is an intracellular receptor different from a membrane receptor?

Answer 26

intracellular receptors bind to ligands that travel into the cell, membrane receptors bind to ligands outside the cell.

Question 27

Adenylyl cyclase

Answer 27

converts ATP to cAMP

Question 28

When a G protein is attached to a GTP it is in

Answer 28

the active state

Question 29

A kinase…

Answer 29

adds a phosphate to a protein