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Physiology Wk 2 Quiz
| Question | Answer |
|---|---|
| Peptide bonds join together molecules of: | amino acids |
| The amino group in an amino acid is: | NH3+. |
| A _____ is a functional group that is temporarily unattached and is highly reactive because of unpaired electrons. | free radical |
| The element that is present in all proteins but not in carbohydrates is: | nitrogen |
| DNA: | is a double-helix strand of nucleotides. |
| The basic building blocks of fats are: | fatty acids and glycerol |
| Which of the following is not true of both triglycerides and phospholipids? | They both contain a hydrophobic and hydrophilic end. |
| The roles played by proteins can be divided into which categories? | Structural and functional |
| When two molecules of glucose are joined, they form which disaccharide? | Maltose |
| Which energy-releasing or energy-transferring molecule does not contain a nucleotide? | Creatine phosphate |
| Amino acids frequently become joined by: | Peptide Bonds |
| All of the following substances are organic except: | electrolytes |
| The type of lipoprotein associated with “bad” cholesterol and the production of atherosclerotic changes in blood vessels is: | LDL |
| Which level of protein structure refers to the number, kind, and sequence of amino acids? | Primary |
| 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 |
| What is the most important factor in determining the physical and chemical properties of fatty acids? | Degree of Saturation |
| If one side of a DNA molecule is CTAGGCTG, the other side would be: | GATCCGAC |
| Which of the following is not true of RNA? | None; RNA contains a ribose sugar, adenine, and is composed of smaller molecules called nucleotides. |
| A structural lipid found in the cell membrane is a: | phospholipid and steroid |
| The types of lipids found that form hormones, such as cortisone, estrogen, and testosterone are: | steroids |
| Unsaturated fats: | will kink or bend because of the double bonds between the carbon atoms. |
| Which of the following is not one of the major groups of organic substances in the human body? | Salts |
| Humans can synthesize 13 of 21 basic amino acids; the remaining 8, which must be included in the diet, are called: | essential amino acids |
| Which lipid acts as a “tissue hormone”? | protaglandin |
| The formation of sucrose involves the removal of a molecule of water. This is called: | dehydration synthesis |
| Which lipid is part of vitamin D?. | steroids |
| Sometimes referred to as animal starch, _____ is the main polysaccharide in the body. | glycogen |
| Which of the following is not true of carbohydrates? | none, The include starches commonly called sugars, are the body's primary source of energy, and are a part of both DNA and RNA |
| Prostaglandins and steroids share which of the following characteristics? | Both have a ring structure in their molecule. |
| The alpha helix is an example of which level of protein structure? | Secondary |
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