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Biology > Nad+ Nadh > Flashcards

Nad+ Nadh Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

What does NAD+ stand for?

A

Nicotinamide adenine dinucleotide

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2
Q

True or False: NAD+ is an oxidized form of the molecule.

A

True

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3
Q

What is the reduced form of NAD+?

A

NADH

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4
Q

Fill in the blank: NAD+ plays a crucial role in ________ metabolism.

A

cellular

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5
Q

What is the primary function of NAD+ in the cell?

A

To act as a coenzyme in redox reactions

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6
Q

Which process primarily uses NAD+?

A

Cellular respiration

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7
Q

True or False: NADH can be converted back to NAD+.

A

True

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8
Q

What type of reactions does NAD+ participate in?

A

Oxidation-reduction (redox) reactions

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9
Q

What is the role of NADH in energy production?

A

It acts as an electron carrier.

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10
Q

Multiple Choice: Which of the following is NOT a function of NAD+? A) Energy production B) DNA repair C) Protein synthesis

A

C) Protein synthesis

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11
Q

What vitamin is a precursor to NAD+?

A

Vitamin B3 (niacin)

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12
Q

True or False: NAD+ is involved in glycolysis.

A

True

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13
Q

Fill in the blank: The conversion of NAD+ to NADH is ________ (oxidation/reduction).

A

reduction

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14
Q

What is the significance of NAD+/NADH ratio in cells?

A

It indicates the cellular metabolic state.

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15
Q

Which enzyme is responsible for the conversion of NAD+ to NADH?

A

Dehydrogenases

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16
Q

True or False: NAD+ is only found in eukaryotic cells.

A

False

17
Q

What is one way NAD+ levels can be increased in the body?

A

Through dietary intake of niacin.

18
Q

Multiple Choice: What happens when NAD+ is reduced to NADH? A) Energy is released B) Energy is consumed C) No energy change

A

B) Energy is consumed

19
Q

What role does NADH play in the electron transport chain?

A

It donates electrons to the chain.

20
Q

Fill in the blank: High levels of NADH indicate a ________ energy state in the cell.

A

high

21
Q

What metabolic pathway produces NADH?

A

Glycolysis

22
Q

True or False: NAD+ can be synthesized de novo in the human body.

A

True

23
Q

What is one consequence of depleted NAD+ levels?

A

Reduced energy production

24
Q

Multiple Choice: NAD+ is a derivative of which nucleotide? A) ATP B) GTP C) AMP

A

A) ATP

25
Q

What cellular condition can increase NAD+ consumption?

A

Oxidative stress

26
Q

Fill in the blank: NAD+ is essential for ________ repair.

A

DNA

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