week 6 Flashcards
1) Peptide bonds join together molecules of:
A. glycerol. B. glucose. C. amino acids. D. water E. oxygen.
1) Peptide bonds join together molecules of:
A. glycerol. B. glucose. C. amino acids. * D. E. water. oxygen.
2) Each amino acid differs from another in the
A) number of central carbon atoms. B) size of the amino group. C) number of carboxyl groups. D) nature of the R group. E) number of peptide bonds in the molecule.
2) Each amino acid differs from another in the
A) number of central carbon atoms. B) size of the amino group. C) number of carboxyl groups. D) nature of the R group. * E) number of peptide bonds in the molecule.
3) Glycoproteins and proteoglycans are combinations of proteins and
A) carbohydrates. B) fatty acids. C) lipids. D) nucleic acids. E) none of the above
3) Glycoproteins and proteoglycans are combinations of proteins and
A) carbohydrates. * B) fatty acids. C) lipids. D) nucleic acids. E) none of the above
4) The building blocks of proteins are
A) triglycerides. B) phospholipids. C) amino acids. D) monosaccharides. E) eicosanoids.
4) The building blocks of proteins are
A) triglycerides. B) phospholipids. C) amino acids. * D) monosaccharides. E) eicosanoids.
5) Proteins
A) are the body’s source of immediate energy.
B) are the building blocks of nucleotides.
C) provide much of the structure of body cells and tissues.
D) contain the genetic information of the cell.
E) insulate and cushion the body.
5) Proteins
A) are the body’s source of immediate energy.
B) are the building blocks of nucleotides.
C) provide much of the structure of body cells and tissues. *
D) contain the genetic information of the cell.
E) insulate and cushion the body.
6) Adjacent amino acids in a polypeptide chain are held together by
A) hydrogen bonds. B) ionic bonds. C) Van der Waals bonds. D) peptide bonds. E) high energy bonds.
6) Adjacent amino acids in a polypeptide chain are held together by
A) hydrogen bonds. B) ionic bonds. C) Van der Waals bonds. D) peptide bonds. * E) high energy bonds.
7) The enzyme lactase catalyses the chemical reaction that changes lactose to:
A) glucose only. B) glucose and fructose. C) fructose and galactose. D) glucose and galactose. E) alcohol.
7) The enzyme lactase catalyses the chemical reaction that changes lactose to:
A) glucose only. B) glucose and fructose. C) fructose and galactose. D) glucose and galactose. * E) alcohol.
8) Proteins are composed of ____ commonly occurring amino acids.
A) 10 B) 18 C) 20 D) 22 E) 50
8) Proteins are composed of ____ commonly occurring amino acids.
A) 10 B) 18 C) 20 * D) 22 E) 50
9) Amino acids frequently become joined by:
A) peptide bonds. B) catabolic reactions. C) atrophic reactions. D) all of the above. E) Newton bonds.
9) Amino acids frequently become joined by:
A) peptide bonds. * B) catabolic reactions. C) atrophic reactions. D) all of the above. E) Newton bonds.
10) Which of the following is not a function of protein?
A) Provides structure for the body
B) Acts as a catalyst for chemical reactions
C) Provides energy for the body
D) All of the above are functions of protein
10) Which of the following is not a function of protein?
A) Provides structure for the body
B) Acts as a catalyst for chemical reactions
C) Provides energy for the body
D) All of the above are functions of protein*
11) Which level of protein structure refers to the number, kind, and sequence of amino acids?
A) Primary
B) Secondary
C) Tertiary
D) Quaternary
11) Which level of protein structure refers to the number, kind, and sequence of amino acids?
A) Primary *
B) Secondary
C) Tertiary
D) Quaternary
12) Which level of protein structure is one that contains several polypeptide chains?
A) Primary
B) Secondary
C) Tertiary
D) Quaternary
12) Which level of protein structure is one that contains several polypeptide chains?
A) Primary
B) Secondary
C) Tertiary
D) Quaternary *
13) The function of a catalyst is to:
A) convert strong acids and bases into weak acids and bases.
B) store energy released during exergonic reactions.
C) act as the chemical link between atoms in a covalent bond.
D) lower the activation energy needed for a chemical reaction to occur.
E) keep particles in a colloid from settling out.
13) The function of a catalyst is to:
A) convert strong acids and bases into weak acids and bases.
B) store energy released during exergonic reactions.
C) act as the chemical link between atoms in a covalent bond.
D) lower the activation energy needed for a chemical reaction to occur. *
E) keep particles in a colloid from settling out.
14) Which of the following is true of a catalyst?
A) It is changed by the chemical reaction in which it participates.
B) It helps orient colliding molecules so that a reaction is more likely to occur.
C) It raises the activation energy required for a reaction to occur.
D) It prevents chemical reactions from occurring under physiological conditions.
E) It changes the difference in potential energy between reactants and products.
14) Which of the following is true of a catalyst?
A) It is changed by the chemical reaction in which it participates.
B) It helps orient colliding molecules so that a reaction is more likely to occur. *
C) It raises the activation energy required for a reaction to occur.
D) It prevents chemical reactions from occurring under physiological conditions.
E) It changes the difference in potential energy between reactants and products.
15) Enzymes are
A) biological catalysts. B) usually large proteins. C) specific for a single substrate. D) A and B are true. E) A, B and C are true.
15) Enzymes are
A) biological catalysts. B) usually large proteins. C) specific for a single substrate. D) A and B are true. E) A, B and C are true. *
