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Chapter 28: Problem 76

A molecule in which the energy of metabolism is stored is (a) glucose; (b) DNA; (c) RNA; (d) glycerol; (e) ATP.

Short Answer

Expert verified
The correct answer is (e) ATP.

Step by step solution

01

Understanding Metabolism and Energy Storage

Comprehending the process of metabolism is important. Metabolism involves all the chemical reactions in a cell that are necessary to sustain life. These reactions involve breaking down substances to obtain energy (catabolism) and building new cellular structures and molecules (anabolism). Energy obtained from catabolism is often stored in another molecule, so it can be used by the cell when needed.
02

Analyzing The Choices

Now each of the options can be analyzed: (a) Glucose - This is a sugar molecule used as a source of energy, but it is not the principal store of energy. (b) DNA - This is the molecule that contains our genetic information, not a store of energy. (c) RNA - RNA is involved in protein synthesis and other functions but it doesn't store energy. (d) Glycerol - It is a component of fats but is not where energy is stored. (e) ATP - Known as Adenosine triphosphate, it is the primary molecule for storing and transferring energy in cells.
03

Identifying The Correct Molecule

As it was analyzed in the previous step, among the given options, Adenosine triphosphate (ATP) is the main molecule that cells use to store and transfer energy. Therefore, ATP is the correct answer.

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Most popular questions from this chapter

The \(R\) group of valine is (a) \(-\mathrm{CH}_{2} \mathrm{OH}\) (b) \(-\mathrm{CH}_{2} \mathrm{COOH} ;(\mathrm{c})-\mathrm{CH}\left(\mathrm{CH}_{3}\right)_{2}\) (d) \(-\mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}\); (e) none of these.

Refer to a typical Escherichia coli bacterium. This is a cylindrical cell about \(2 \mu\) m long and \(1 \mu\)m in diameter, weighing about \(2 \times 10^{-12}\)g and containing about \(80 \%\) water by volume. Calculate the number of lipid molecules present, assuming their average molecular mass to be 700 u and the lipid content to be \(2 \%\) by mass.

Write the structure for the straight-chain form of L-glucose. Does the structure determine if this isomer is levorotatory? Explain.

Of the following, the one that is not a constituent of a nucleic acid chain is (a) purine base; (b) phosphate group; (c) glycerol; (d) pentose sugar; (e) pyrimidine base.

The amino acid ( \(R\) )-alanine is found in insect larvae. Draw the Fischer projection of this amino acid.
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