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Chapter 2: Problem 6

Glucose is an important example of a a. protein. b. carbohydrate. c. lipid. d. nucleic acid.

Short Answer

Expert verified
Glucose is a carbohydrate.

Step by step solution

01

Understanding the Function of Glucose

Start by identifying what glucose is chemically. Glucose is known as a simple sugar that plays a significant role in the body's use of energy.
02

Categorizing Glucose

Think about the major categories of biological molecules: proteins, carbohydrates, lipids, and nucleic acids. Glucose is not known to be related to either proteins, lipids or nucleic acids.
03

Identifying the Correct Category

Glucose is specifically a simple sugar, which fits into the category known as carbohydrates. Carbohydrates are composed of sugar molecules, and glucose is a fundamental unit of this category.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Biological Molecules
Biological molecules are essential for all forms of life, acting as the building blocks that structure and fuel living organisms. They can be divided into four main categories:
  • Carbohydrates: These are the energy providers of the biological world. Composed of sugar molecules, they are central to cellular energy processes.
  • Proteins: Known for their structural and functional roles, proteins make up muscles, enzymes, and many other components of living organisms.
  • Lipids: These are fats and oils, important for energy storage and constituting cellular membranes.
  • Nucleic acids: These include DNA and RNA, carrying the genetic blueprint of an organism.
It's important to recognize which category a molecule belongs to as this determines its role in biological systems. For instance, glucose is neither a protein, a lipid, nor a nucleic acid, but a carbohydrate, which is critical for its function in energy metabolism.
Simple Sugars
Simple sugars, also known as monosaccharides, are the most basic form of carbohydrates. They consist of single sugar molecules that serve as fundamental energy sources and building blocks for more complex carbohydrates. Two noteworthy simple sugars include:
  • Glucose: Often referred to as blood sugar, it is crucial for cellular respiration, the process cells use to produce energy.
  • Fructose: Found naturally in fruits, it is another common simple sugar.
Unlike complex carbohydrates that consist of long chains of sugar units, simple sugars are "ready-to-go" energy packets that are easily broken down and utilized by the body. They provide quick energy boosts, essential for rapid body activities and functioning.
Glucose
Glucose is arguably the most important simple sugar in the biological world. Known for its role as the primary energy source for cells, glucose is a critical player in metabolism. It is a six-carbon sugar with the chemical formula: \[ C_6H_{12}O_6 \]In the human body, glucose is transported in the bloodstream to provide energy to all cells. Here's why glucose is pivotal:
  • Energy Production: Glucose undergoes glycolysis, a process that breaks it down to release energy, which is stored in molecules like ATP (adenosine triphosphate).
  • Regulation of Blood Sugar Levels: The body maintains glucose levels within a tight range, with insulin and glucagon playing crucial roles in balancing blood sugar levels.
  • Brain Fuel: The brain relies heavily on glucose as its primary energy source due to its high rate of metabolism and energy demand.
Understanding glucose's role in the body reveals its importance in both short-term energy supply and overall metabolic health.

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Most popular questions from this chapter

Which of the following statements about ionic bonds is not true? a. They cannot exist without water molecules. b. They are not the same as hydrogen bonds. c. They involve electrical attraction between atoms with opposite charge. d. They are known to exist in crystals of table salt, \(\mathrm{NaCl}\).

The water molecule \(\left(\mathrm{H}_{2} \mathrm{O}\right)\) a. is nonpolar. b. can form a network around both negatively charged ions and positively charged ions. c. can form hydrogen bonds with hydrophobic as well as hydrophilic chemicals. d. has symmetrical sharing of electrons between the oxygen atom and each of the two hydrogen atoms.

Lactase is a protein whose function is to break apart a milk sugar called lactose. RNA polymerase is a protein whose function is to join nucleotides together to create RNA molecules. The structure and function of these two proteins are different most likely because a. there are different amounts of monosaccharides in the backbone of the two proteins. b. the two proteins differ in their sensitivity to \(\mathrm{pH}\). c. one protein is more abundant in the cytoplasm than the other. d. the two proteins differ in their amino acid sequence.

Hydrogen bonds are especially important for living organisms because a. they occur only inside of organisms. b. they are stronger than covalent bonds and maintain the physical stability of molecules. c. they enable polar molecules to dissolve in water, which is the universal medium for life processes. d. once formed, they never break.

Which of the following statements about the nature of matter is not true? a. Anything that is matter must occupy space. b. Anything that is matter must have mass. c. About 92 different elements and 20 types of matter occur naturally in our universe. d. The smallest unit of matter that has all the properties of a particular element is the atom.
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