Amino acids contain the following elements EXCEPT A. oxygen B. potassium C. carbohydrate D. hydrogen E. nitrogen
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Amino acids contain the following elements EXCEPT
- A. oxygen
- B. potassium
- C. carbohydrate
- D. hydrogen
- E. nitrogen
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- Cellulose and starch are examples of______. a. monosaccharides b. disaccharides c. lipids d. polysaccharidesWhich of the following statements concerning palmitic acid is INCORRECT? a. It can barely be dissolved in water. b. It is an unsaturated fatty acid. c. It is consisted of 16 carbons. d. It is a lipid.Which of the following statements is incorrect about disulfide bonds? a. They form between two cysteine amino acids.b. They are noncovalent.c. They contribute to the tertiary structure of some proteins.d. They contribute to the quaternary structure of some proteins.e. They involve the loss of two hydrogen atoms.
- Which of the following is the characteristic that is common to all lipids?* A. They are made up of lots of double bonds B. They are acidic when mixed with water C. They are insoluble in water D. They do not have high energy contentThe plant dye Henna imparts orangered colour to skin and hairs due to its reaction with which of the following? A) Protein and amino acids B) Lipids C) Carbohydrates D) Amino acidsWhich of the following statements about proteins is FALSE? a They can be hydrophobic, hydrophilic, or both. b They are composed of amino acids. c Their primary function is energy storage. d They have multiple levels of structural organization.
- Polyunsaturated fatty acids a). are solid at room temperature b). have carbon-carbon double bonds c). are polar d). have high melting pointsAdjacent amino acids are linked together by the formation of a peptide bond between which of the following? A. An R group and a carboxyl group B. Two R groups C. An amine group and a carboxyl group D. Two amine groupsWhich of the following is false about carbohydrates? a. they serve as supportive structure; and protective components in the cell walls of the bacteria and plants b. they are essential components of the genetic material c. they can act as ligands and receptors in cellular communication d. they are generally non-polar and supply the body with fat-soluble vitamins
- A triglyceride consists of (a) glycerol plus three fatty acids, (b) a sugar-phosphate backbone to which two amino groups are attached, (c) two to several hexoses, (d) amino acids that have been thoroughly saturated with hydrogen.The monomers that make up the structure of carbohydrates are called which of the following? A. Nucleotides B. Polysaccharides C. Monosaccharides D. Amino acidsWhich of the following is FALSE about carbohydrates? a. They are essential components of the genetic material. b. They serve as supportive structural and protective components in the cell walls of bacteria and plants. c. They can act as ligands and receptors in cellular communication. d. They are generally non-polar and supply the body with fat-soluble vitamins.
