CAMPBELL BIOLOGY:CONCEPTS..W/JUNGLE>IC
15th Edition
ISBN: 9781269930741
Author: Reece
Publisher: PEARSON C
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Chapter 6, Problem 12TYK
Summary Introduction
To explain: Why the daily amount of niacin and riboflavin requirement is very less in comparison to glucose.
Introduction:
Riboflavin or vitamin B2 is used as a component of flavin adenine dinucleotide (FAD) or FADH (reduced FAD) and niacin is an important component of nicotinamide adenine dinucleotide (NAD+) or NADH (reduced NAD+).
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Your body makes NAD+ from two B vitamins, niacin and riboflavin. You need only tiny amounts of these vitamins. The U.S. Food and Drug Administration’s recommended dietary allowances are 20 mg daily for niacin and 1.7 mg daily for riboflavin. These amounts are thousands of times less than the amount of glucose your body needs each day to fuel its energy requirements. How many NAD+ molecules are needed for the breakdown of each glucose molecule? Why do you think your daily requirement for these substances is so small?
In general, the ratio of oxidized versus reduced NAD is best described by which ONE statement below?
A.
the NADH/NAD+ ratio is greater than 1
B.
the NADH/NAD+ ratio is always changing so one cannot make generalized assertions about this ratio
C.
the NAD+/NADH ratio is greater than 1
D.
the NAD+/NADH ratio is equal to 1
If you are given 4 hydrogen atoms (4H) and asked to carry out reduction of NAD+, state all the products that will result from this process. You can use any number of NAD+ but must account for all 4 H atoms and have no full H atoms left.
Chapter 6 Solutions
CAMPBELL BIOLOGY:CONCEPTS..W/JUNGLE>IC
Ch. 6 - Fill in the blanks in this summary map to help you...Ch. 6 - A biochemist wanted to study how various...Ch. 6 - In glycolysis, _____ is oxidized and _____ is...Ch. 6 - Which of the following is the most immediate...Ch. 6 - Which of the following is a true distinction...Ch. 6 - The poison cyanide binds to an electron carrier...Ch. 6 - In which of the following is the first molecule...Ch. 6 - Which of the three stages of cellular respiration...Ch. 6 - Compare and contrast fermentation as it occurs in...Ch. 6 - Prob. 10TYK
Ch. 6 - Prob. 11TYKCh. 6 - Prob. 12TYKCh. 6 - In the citric acid cycle, an enzyme oxidizes...Ch. 6 - ATP synthase enzymes are found in the prokaryotic...Ch. 6 - 15. SCIENTIFIC THINKING Several studies have found...Ch. 6 - For a short time in the 1930s, some physicians...Ch. 6 - Explain how the mechanism of brown fat metabolism...
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- NAD in its reduced form is symbolized as Select one: O a. NAD. O b. NAD. O C. NADP+. O d. NADP. O e. NADH.arrow_forwardIf one mole of glucose goes through glycolysis and TCA cycles, how many moles of NADH are produced? a. 10 b. 6 c. 8 d. 2 e. 4arrow_forwardHow can you identify biological role for the following substances depending on their ratio / porportion within the cells; NAD+/NADH and NADP+/NADPH?arrow_forward
- Along with hydrogen, what else is transferred by NADH to other molecules?arrow_forwardWhich of the following factors favor fatty acid synthesis in liver cells when blood glucose levels are way higher than 10 mM? a.high NADPH and high NADH b low NADPH and low NADH c low NADPH and low NAD+ d high NADPH and high NAD+arrow_forwardIf you were to ferment grapes into wine in an organism that did not have NADH, what would likely be produced from the glucose that is consumed? a) Pyruvate b) Acetaldehydearrow_forward
- Which of the following electron carriers are in the reduced form? Note - there may be more than one. A. FAD B. FADH2 C. NAD+ D. NADH E. NADP+arrow_forwardTotal number of nadh molecules generated as a result of catabolism of one glucose molecule is a. 4 b. 3 c. 10 d. 6arrow_forwardThe energy stored in one molecule of NADH is used to synthesize how many molecules of ATP?arrow_forward
- Given the roles of NAD+ /NADH in dehydrogenation reactions and NADPH/NADP+ in reductions, would you expect the intracellular ratio of NAD+ to NADH to be high or low? What about the ratio of NADP+ to NADPH? Explain your answers.arrow_forwardList three differences in structure or function between NADH and NADPH.arrow_forwardConversion of NAD+ to NADH is accomplished by the addition of A. a proton. B. an electron. C. a hydride ion. D. a hydrogen atom.arrow_forward
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