24 Questions
Which type of fat has been altered by the addition of hydrogen atoms?
Trans fats
What is the main difference between hydrophilic and hydrophobic molecules?
Hydrophilic molecules have polar ends that are attracted to water, while hydrophobic molecules have non-polar ends that are repelled by water.
Which of the following is NOT a characteristic of proteins?
Are made up of only carbon, hydrogen, oxygen, and nitrogen atoms
Which of the following is an important regulatory molecule derived from fatty acids?
Prostaglandins
What is the role of cholesterol in the body?
Both a and b
What is the process called when ions separate in an ionic compound dissolved in polar water?
Dissociation
What is the effect of denaturation on the shape of proteins?
Denaturation causes the proteins to change their shape.
Which of the following is NOT a classification of chemical reactions?
Substitution
What is the term used for the substances that result from a chemical reaction?
Products
Which type of energy is stored in chemical bonds?
Chemical energy
What is the term used for synthesis reactions that occur in the body?
Anabolism
What is the term used for a substance that increases the rate of a chemical reaction without being permanently changed or depleted?
Catalyst
What is the normal pH range of blood?
7.35 - 7.45
Which type of fatty acid has one or more double covalent bonds?
Polyunsaturated Fatty Acid
What molecule is the by-product of the breakdown of food molecules?
Carbon Dioxide
What type of carbohydrates are the smallest and considered simple sugars?
Monosaccharides
In which situation does blood pH drop below 7.35?
Acidosis
Which type of molecules do not contain carbon?
Inorganic Molecules
What is the difference between mass and weight?
Mass is the amount of matter in an object, while weight is the gravitational force acting on an object.
Which of the following best describes the structure of an atom?
An atom consists of a dense core called the nucleus, surrounded by a cloud of negatively charged electrons.
What is the difference between an ionic bond and a covalent bond?
In an ionic bond, electrons are transferred between atoms, while in a covalent bond, electrons are shared between atoms.
What is the difference between a polar covalent bond and a nonpolar covalent bond?
Polar covalent bonds involve the unequal sharing of electrons between atoms, while nonpolar covalent bonds involve the equal sharing of electrons.
What is the difference between a molecule and a compound?
A molecule consists of two or more atoms that are chemically combined, while a compound consists of two or more different elements that are chemically combined.
What is the role of hydrogen bonds in biological systems?
Hydrogen bonds are weak attractions between polar molecules that play a crucial role in the structure and function of biological molecules like DNA and proteins.
Test your knowledge on the basic principles of chemistry related to the atomic composition, structure of substances, and reactions they undergo in the context of life. Explore concepts such as matter, mass, weight, elements, atoms, and atomic structure.
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