Micro Chapter 2

5 Written Questions

1. C. Contains thymine
2. C. Chains of repeating monomers
3. C. Nitrogen and phosphorus
4. E. Amino acids
5. A. Nucleic acids

5 Matching Questions

1. The purine___ always binds with the pyrimidine__ in DNA and RNA.
   A. guanine, cytosine
   B. cytosine, guanine
   C. adenine, guanine
   D. thymine, guanine
2. All of the following are lipids except
   A. Cholesterol
   B. Starch
   C. Phospholipid
   D. Wax
   E. Triglyceride
3. An amino acid contains all of the following except
   A. An amino group
   B. A carboxyl group
   C. A variable R group
   D. An a carbon
   E. A nitrogen base
4. Organic chemicals always have a basic framework of the element _____ bonded to other atoms.
   A. Carbon
   B. Nitrogen
   C. Oxygen
   D. Hydrogen
   E. Phosphorous
5. You are asked to make a 1M solution of Sodium Bicarbonate or Baking Soda (NaHCO3) for a DNA extraction lab. How many gram(s) of sodium bicarbonate (NaHCO3) should be added to 1L of water to make the required solution? Use the table of atomic masses to help you.
   A. 29 g
   B. 62 g
   C. 84 g
   D. 91.1 g

1. a A. guanine, cytosine
2. b E. A nitrogen base
3. c A. Carbon
4. d B. Starch
5. e C. 84 g

5 Multiple Choice Questions

1. D. All of the choices are correct
   1. One nucleotide contains
      A. One phosphate
      B. One pentose sugar
      C. One nitrogen base
      D. All of the choices are correct
      E. None of the choices are correct
   2. ATP is best described as
      A. An enzyme
      B. A double helix
      C. An electron carrier
      D. The energy molecule of cells
      E. All of the choices are correct
   3. An amino acid contains all of the following except
      A. An amino group
      B. A carboxyl group
      C. A variable R group
      D. An a carbon
      E. A nitrogen base
   4. Which is not true about enzymes?
      A. Found in all cells
      B. Are catalysts
      C. Participate in the cell's chemical reactions
      D. Can be denaturated by heat and other agents
      E. Have high-energy bonds between phosphates
2. D. Saturated
   1. A fat is called _____ if all carbons of the fatty acid chain are single bonded to 2 other carbons and 2 hydrogens.
      A. Unsaturated
      B. Polyunsaturated
      C. Monounsaturated
      D. Saturated
      E. None of the choices are correct
   2. Organic chemicals always have a basic framework of the element _____ bonded to other atoms.
      A. Carbon
      B. Nitrogen
      C. Oxygen
      D. Hydrogen
      E. Phosphorous
   3. A solution of pH 7 compared to a solution of pH 9
      A. Is more basic
      B. Has no OH- ions
      C. Has more H+ ions
      D. Has a higher pH
      E. All of the choices are correct
   4. All of the following are polysaccharides except
      A. Dextran in some bacterial slime layers
      B. Agar used to make solid culture media
      C. A cell's glycocalyx
      D. Cellulose in certain cell walls
      E. Prostaglandins in inflammation
3. C. Animals
   1. Which is not true about enzymes?
      A. Found in all cells
      B. Are catalysts
      C. Participate in the cell's chemical reactions
      D. Can be denaturated by heat and other agents
      E. Have high-energy bonds between phosphates
   2. The lipid group that serves as energy storage molecules are
      A. Prostaglandins
      B. Waxes
      C. Phospholipids
      D. Steroids
      E. Triglycerides
   3. An amino acid contains all of the following except
      A. An amino group
      B. A carboxyl group
      C. A variable R group
      D. An a carbon
      E. A nitrogen base
   4. Starch is the primary storage food for all of the following except
      A. Green plants
      B. Algae
      C. Animals
      D. Some fungi
      E. All of these store food as starch
4. D. 100 times more acidic
   1. One nucleotide contains
      A. One phosphate
      B. One pentose sugar
      C. One nitrogen base
      D. All of the choices are correct
      E. None of the choices are correct
   2. A solution of pH 7 compared to a solution of pH 9
      A. 2 times more acidic
      B. 20 times more acidic
      C. 20 times more basic
      D. 100 times more acidic
      E. 100 times more basic
   3. An amino acid contains all of the following except
      A. An amino group
      B. A carboxyl group
      C. A variable R group
      D. An a carbon
      E. A nitrogen base
   4. A solution of pH 7 compared to a solution of pH 9
      A. Is more basic
      B. Has no OH- ions
      C. Has more H+ ions
      D. Has a higher pH
      E. All of the choices are correct
5. A. Fatty acids
   1. What part of a phospholipid forms hydrophobic tails?
      A. Fatty acids
      B. Glycerol
      C. Phosphate
      D. Alcohol
      E. All of the choices are correct
   2. Which of the following is not a pyrimidine?
      A. Uracil
      B. Adenine
      C. Thymine
      D. Cytosine
      E. All of these are pyrimidines
   3. Which of the following would have glycosidic bonds?
      A. Triglycerides
      B. Monosaccharides
      C. Polypeptides
      D. Polysaccharides
      E. ATP
   4. An amino acid contains all of the following except
      A. An amino group
      B. A carboxyl group
      C. A variable R group
      D. An a carbon
      E. A nitrogen base

5 True/False Questions

1. All of the following are polysaccharides except
   A. Dextran in some bacterial slime layers
   B. Agar used to make solid culture media
   C. A cell's glycocalyx
   D. Cellulose in certain cell walls
   E. Prostaglandins in inflammation → E. Prostaglandins in inflammation

   True        False

2. The lipid group that serves as energy storage molecules are
   A. Prostaglandins
   B. Waxes
   C. Phospholipids
   D. Steroids
   E. Triglycerides → C. Phospholipids

   True        False

3. The lipid group that is the major component of cell membranes are the
   A. Prostaglandins
   B. Waxes
   C. Phospholipids
   D. Steroids
   E. Triglycerides → E. Triglycerides

   True        False

4. What type of bonds are formed by dehydration synthesis between adjacent amino acids?
   A. Glycosilic
   B. Ester
   C. Peptide
   D. Disulfide
   E. Phosphate → A. Fatty acids

   True        False

5. Which is not true about enzymes?
   A. Found in all cells
   B. Are catalysts
   C. Participate in the cell's chemical reactions
   D. Can be denaturated by heat and other agents
   E. Have high-energy bonds between phosphates → E. Have high-energy bonds between phosphates

   True        False