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Chap 4
Week 2 Biomolecules
| Question | Answer |
|---|---|
| A structural lipid found in the cell membrane is a: triglyceride. phospholipid steroid. Both B and C are correct. | Both B and C are correct. |
| The basic building blocks of fats are: | fatty acids and glycerol. |
| Which of the following is not true of carbohydrates? They include substances commonly called sugars. They are the body’s primary source of energy. They are a part of both DNA and RNA. All of the above are true of carbohydrates. | All of the above are true of carbohydrates. |
| When two molecules of glucose are joined, they form which disaccharide? | Maltose |
| Prostaglandins and steroids share which of the following characteristics? | Both have a ring structure in their molecule. |
| The roles played by proteins can be divided into which categories? | Structural & Functional |
| The types of lipids found that form hormones, such as cortisone, estrogen, and testosterone are: | steroids |
| The amino group in an amino acid is: | NH3+. |
| The element that is present in all proteins but not in carbohydrates is: | Nitrogen |
| The alpha helix is an example of which level of protein structure? | secondary |
| Which level of protein structure refers to the number, kind, and sequence of amino acids? | Primary |
| Which of the following is not true of both triglycerides and phospholipids? | They both contain a hydrophobic and hydrophilic end. |
| Peptide bonds join together molecules of: | amino acids |
| f one side of a DNA molecule is CTAGGCTG, the other side would be: | GATCCGAC. |
| Which lipid acts as a “tissue hormone”? | Prostaglandin |
| Humans can synthesize 13 of 21 basic amino acids; the remaining 8, which must be included in the diet, are called: | Essential Amino Acids |
| Sometimes referred to as animal starch, _____ is the main polysaccharide in the body. | Glycogen |
| Which of the following is not one of the major groups of organic substances in the human body? | Salts |
| Amino acids frequently become joined by: | Peptide Bonds |
| Which energy-releasing or energy-transferring molecule does not contain a nucleotide? | Creatine phosphate |
| What is the most important factor in determining the physical and chemical properties of fatty acids? | Degree Saturation |
| Unsaturated fats: | will kink or bend because of the double bonds between the carbon atoms. |
| Which of the following is not true of RNA? It contains ribose sugar. It contains adenine. It is composed of smaller molecules called nucleotides. All of the above are true of RNA. | All of the above are true of RNA. |
| DNA: | is a double-helix strand of nucleotides. |
| The formation of sucrose involves the removal of a molecule of water. This is called: | dehydration synthesis. |
| A _____ is a functional group that is temporarily unattached and is highly reactive because of unpaired electrons. | free radical |
| The type of lipoprotein associated with “bad” cholesterol and the production of atherosclerotic changes in blood vessels is: | LDL |
| The term glycoprotein, a combination of two words, tells you that the compound is made of _____, with _____ being the dominant component. | carbohydrate and protein; protein |
| Which lipid is part of vitamin D? | Steroids |
| All of the following substances are organic except: -lipids -electrolytes. -carbohydrates. - proteins. | -electrolytes. |
| Proteins are polymers of | amino acids. |
| The most important monosaccharide is | glucose. |
| Chaperone proteins assist in the proper folding of other proteins so they can have the correct functional shape. | True |
| ATP | is the form of energy that cells generally use. |
| DNA and RNA are important because | information molecules. |
| In base pairing of DNA molecules, _____ is bound to _____. | adenine; thymine |
| Which of the following is polymer of glucose that is sometimes referred to as animal starch? | Glycogen |
| RNA and DNA have the same pyrimidine bases but different purine bases. | False |
| Which of these is not a lipid? | polysaccharide |
| What determines how a protein performs? | shape |
| The carbon-containing molecules formed by living things are often called | organic molecules. |
| Which term means “water loving” and applies to the phospholipid head? | hydrophilic |
| What term is often used to describe certain arrangements of atoms attached to the carbon core of many organic molecules? | functional group |
| A very large molecule composed of subunits of sugar, a nitrogen base, and a phosphate bond is a | nucleic acid |
| All proteins have which four elements? | carbon, oxygen, hydrogen, and nitrogen |
| The lipid that is often referred to as a tissue hormone is | prostaglandin. |
| When two amino acids are joined, a peptide bond is formed and an H+ ion is released. FALSE | FALSE |
| Any large molecule made up of many identical small molecules is called a(n) | polymer. |
| A triglyceride is composed of a glycerol molecule and three of the same type of fatty acid. FALSE | FALSE |
| A saturated fatty acid is one in which | all available bonds of its hydrocarbon chain are filled. |
Created by:
Crystal C
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