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BSC 2010 - Biology I > Exam #3 > Flashcards

Flashcards in Exam #3 Deck (183)
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91

They would like to repel and come apart, but they can't...because the ________ bond holds these phosphates together. The only way to liberate a phosphate is if you _____ the covalent bond...________ ATP...that's how the energy gets released.

covalent, break, hydrolyze

92

Adenosine refers to the base adenine plus the sugar ______.

ribose

93

ATP hydrolysis is endergonic/exergonic?

EXERGONIC, provides energy

94

What is Pi?

Inorganic phosphate

95

If you put energy on the product side, you show that this is ________. Delta G will be _______.

Exergonic, negative

96

___ kcal/mole is released when a mole of ATP is hydrolyzed

-7.3kcal/mole

97

How is the ATP used to do work?

ATP hydrolysis is coupled to endergonic reaction, allowing it to move forward

98

Delta G will be positive...endergonic..._____ kcal/mole

+3.4 kcal/mole

99

Would the hydrolysis of 1 mole of ATP provide enough energy?

YES. The absolute value of 7.3 is greater than 3.4, therefore there's enough energy.

100

If you add -7.3 + 3.4, you get a negative value. A negative value means...?

you have enough energy

101

How does coupling work?

Glutamic acid + ATP...when they react, a phosphate comes off of the ATP, which becomes ADP, and sticks onto the Glutamic acid. When it does that, the glutamic acid now becomes reactive. It's now easy to replace that phosphate with an amino group. And now you have glutamine
**It works through phosphorylation of a reactant.***

102

What does phosphorylation do?

Adding a phosphate covalently makes that compound unstable, makes it reactive...whenever you have a phosphate, that means you have energy.

103

How does the Na/K pump function?

Through conformational change

104

The Na/K pump was _________ in order to drive the conformational change

phosphorylated

105

Using ATP means _________ it.

hydrolyzing

106

What do we hydrolyze ATP into?

ADP and inorganic phosphate

107

Energy from catabolism is...
Energy from anabolism is...

exergonic
endergonic

108

Using ATP means breaking it down into ____ and ______ _______ and then making it again which means...

ADP and inorganic phosphate
...putting ADP and inorganic phosphate back together

109

We make ATP through _________

catabolism

110

What is the most efficient form of catabolism?

Cellular respiration

111

What is a less efficient, effective way of catabolism?

Fermentation

112

What do all reactions have in effect?

An energy barrier

113

The energy barrier is the energy to ______ bonds.

breaks

114

The barrier makes reactions _______.

slow

115

An energy barrier must be _______ for every single reaction.

overcome

116

How do we increase the rate of a reaction?

Use a catalyst

117

What's an example of a catalyst?

Heat

118

Why is it not a good idea to apply heat to cells?

1) denaturing proteins
2) no specificity

119

What is the biological solution/catalyst?

We accomplish catalysis with ENZYMES.
Enzymes do not damage cells. Moreover...they're very specific for the reaction we desire.

120

T/F: There's an enzyme for every biochemical reaction

TRUE