> Biochemistry : Proteins Quiz
Biochemistry : Proteins Quiz
Proteins are organic polymers made up of amino acids linked together and folded in specific ways. Proteins are involved in many biological functions, including catalyzing reactions, transporting substances, regulating cellular processes, forming structures, digesting foods, recycling wastes and serving as energy sources. Proteins can be synthesized to be used as medicines.
The largest number of different proteins function as enzymes. Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy of a reaction.
Some proteins are involved in transporting smaller molecules throughout the body. Hemoglobin is a protein that carries oxygen through the blood. Other proteins bond with lipids to transport them throughout the body.
Structural proteins are proteins whose sole function is to form structures vital to organisms. The most abundant structural protein in most animals is collagen, which is part of skin, ligaments, tendons and bones.
Hormones are messenger molecules that carry signals from one part of the body to another. Some hormones are proteins. Insulin is a small protein that is made in the pancreas. It signals the body that blood sugar is abundant and should be stored. Diabetics do not produce enough insulin. Another protein hormone, gonadotropin, is synthesized by an embryo. Release of gonadotropin signals the development of a placenta to nourish the embryo.
For the following quiz, review the above summary to assist you in answering the question. Select the best choice from the given answers.
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