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week 2 midterm
ch 3
| Term | Definition |
|---|---|
| If one side of a DNA molecule is CTAGGCTG, the other side would be: | a.CTAGGCTG b.GATCCGAC. c. CUAGGCUG. d.GAUCCGAC answer b. |
| The alpha helix is an example of which level of protein structure? | a.Primary b. Secondary c. Tertiary d. Quaternary answer: b. |
| The term glycoprotein, a combination of two words, tells you that the compound is made of _____, with _____ being the dominant component. | a. a lipid and a protein; the lipid b. carbohydrate and protein; carbohydrate c. a lipid and a protein; the protein d. carbohydrate and protein; protein answer: d. |
| DNA: | a.a single strand of nucleotides. b. contains the sugar ribose. c. is a double-helix strand of nucleotides. d. transports amino acids during protein synthesis. answer: c. |
| Peptide bonds join together molecules of: | a.glycerol. b.glucose. c. amino acids. d.water. answer: c. |
| Prostaglandins and steroids share which of the following characteristics? | a.Both are found in the cell membrane. b.Both have a ring structure in their molecule. c. Both have a saturated fat in their structure. d. None of the above are shared characteristics. answer: b. |
| A _____ is a functional group that is temporarily unattached and is highly reactive because of unpaired electrons. | a.hydroxyl b.phosphate c. amine group d. free radical answer: d. |
| Which of the following is not true of RNA? | a. It contains ribose sugar. b. It contains adenine. c. It is composed of smaller molecules called nucleotides. d. All of the above are true of RNA. answer: d. |
| Which of the following is not true of both triglycerides and phospholipids? | a. They both contain glycerol. b. They both contain fatty acids. c. They both contain a hydrophobic and hydrophilic end. d. All of the above are true of both triglycerides and phospholipids. answer: c. |
| Which of the following is not one of the major groups of organic substances in the human body? | a. Proteins b. Salts c. Lipids d. Nucleic acids answer: b. |
| The element that is present in all proteins but not in carbohydrates is: | a. carbon. b. hydrogen. c. oxygen. d. nitrogen. answer: d. |
| A structural lipid found in the cell membrane is a: | a. triglyceride. b. phospholipid. c. steroid. d.Both B and C are correct answer: d. |
| Unsaturated fats: | a. Contain all the hydrogen atoms they can hold. b. contain only single bonds between carbon atoms. c. are usually solids at room temperature. d. will kink or bend because of the double bonds between the carbon atoms. answer: d. |
| When two molecules of glucose are joined, they form which disaccharide? | a. Sucrose b. Maltose c. Lactose d. Fructose answer: b. |
| Amino acids frequently become joined by: | a. peptide bonds. b. catabolic reactions. c. atrophic reactions. d. all of the above. answer: a. |
| Which level of protein structure refers to the number, kind, and sequence of amino acids? | a. Primary b. Secondary c.Tertiary d. Quaternary answer: a. |
| Humans can synthesize 13 of 21 basic amino acids; the remaining 8, which must be included in the diet, are called: | a. enzymes. b. essential amino acids. c. structural proteins. d.peptide bonds. answer: b. |
| Sometimes referred to as animal starch, _____ is the main polysaccharide in the body. | a.Sucrose b. maltose c. glucose d. glycogen answer: d. |
| Which of the following is not true of carbohydrates? | a. They include substances commonly called sugars. b. They are the body’s primary source of energy. c. They are a part of both DNA and RNA. d. All of the above are true of carbohydrates. answer: d. |
| The roles played by proteins can be divided into which categories? | a.Structural and functional b. Chemical and functional c. Structural and chemical d. Dehydration synthesis and hydrolysis answer: a. |
| The amino group in an amino acid is | a. NH3+. b. COO–. c. symbolized by the letter R. d. SO2. answer: a. |
| The types of lipids found that form hormones, such as cortisone, estrogen, and testosterone are: | a. triglycerides. b. phosphoglycerides. c. steroids. d. prostaglandins. answer: d. |
| The basic building blocks of fats are: | a. monosaccharides. b. disaccharides. c. amino acids. d. fatty acids and glycerol. answer; d. |
| Which energy-releasing or energy-transferring molecule does not contain a nucleotide? | a. FAD b. Creatine phosphate c. NAD d. ATP answer: b. |
| The type of lipoprotein associated with “bad” cholesterol and the production of atherosclerotic changes in blood vessels is: | a. HDL. b. LDL. c. VHDL. d. none of the above. answer: b. |
| The formation of sucrose involves the removal of a molecule of water. This is called: | a. hydrolysis. b. oxidation. c. decomposition. d. dehydration synthesis. answer : d. |
| Which lipid is part of vitamin D? | a. Glycerol b. Steroids c. Prostaglandins d.Fatty acids answer: b. |
| Which lipid acts as a “tissue hormone”? | a. Triglyceride b. Prostaglandin c. Steroid d. Phospholipid answer: b. |
| What is the most important factor in determining the physical and chemical properties of fatty acids? | a. Degree of saturation b. Presence of glycerol c. Available bonds of hydrocarbons d. Polarity answer: a. |
| All of the following substances are organic except: | a. lipids. b. electrolytes. c. carbohydrates. d. proteins. answer: b. |
Created by:
kristineminer-allen
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