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Mader's Concepts in Biology, First Edition
Copyright © The McGraw-Hill Companies, InC) Permission required for reproduction or display.
Sylvia S. Mader
Chapter 3
Question 1
Molecules which speed up chemical reactions in cells are called:
A. vitamins
B. minerals
C. carbohydrates
D. enzymes
E. lipids
Question 2
In general, plants have more types of enzymes when compared to animals due to the process of photosynthesis.
A. true
B. false
Question 3
Which of the following statements is not true?A. plants produce more molecules than animals due to
photosynthesisB. animals produce more molecules than plants due to
their complexityC. plants produce more molecules than animals to
protect themselvesD. animals produce fewer molecules than plants for
supportE. plants produce more molecules than animals for
coloration
Question 4
A chemist is studying organic molecules in her lab. Which of the following molecules would she be least interested in studying?
A. carbohydrates
B. proteins
C. water
D. nucleic acids
E. lipids
Question 5
Which of the following organisms uses chitin for structure and support?
A. a cactus
B. a bacteria
C. a tree
D. a crab
E. a human
Question 6
Which of the following organic molecules would bacteria use to strengthen its cell wall?
A. cellulose
B. starch
C. chitin
D. glycogen
E. peptidoglycans
Question 7
The most essential ingredient in organic molecules is hydrogen.
A. true
B. false
Question 8
Which of the following is not a statement associated with organic molecules?
A. they always form through ionic bondsB. they are quite large and bond with many
atomsC. they are associated with living organismsD. they always contain carbon bonded to other
atomsE. they always form through covalent bonds
Question 9
Because carbon only has four electrons in its outer shell, carbon must:
A. gain four electrons to complete its outer shell
B. lose four electrons to become stable
C. share four electrons to complete its outer shell
D. share two electrons to complete its outer shell
E. gain or lose two electrons depending on what it is bonding with
Question 10
A chemist is studying a specific combination of bonded atoms which always react in the same way. Which of the following would he or she be most likely interested in studying?
A. a hydrophilic groupB. a covalent groupC. a hydrophobic groupD. a functional groupE. an organic group
Question 11
Which of the following molecules transform a carbon chain into an alcohol?
A. carboxyl
B. phosphate
C. carbonyl
D. sulfhydryl
E. hydroxyl
Question 12
Which of the molecules would be associated with nucleotides and phospholipids?
A. carboxyl
B. phosphate
C. carbonyl
D. sulfhydryl
E. hydroxyl
Question 13
Which of the following molecules can ionize and release hydrogen ions to make the solution more acidic?
A. carboxyl
B. phosphate
C. carbonyl
D. sulfhydryl
E. hydroxyl
Question 14
A chemist is in the lab studying a large organic molecule with many subunits. Which of the following terms would best describe the molecule that he or she is studying?
A. monomerB. isomerC. polymerD. hydromerE. hydrophilic
Question 15
A molecule which speeds a reaction by bringing the reactants together is referred to as:
A. a lipid
B. an enzyme
C. a nucleic acid
D. a carbohydrate
E. a glycerol
Question 16
The removal of a hydroxyl group and a hydrogen atom from two molecules to join them together is known as:
A. a hydrolysis reaction
B. a monomer reaction
C. a polymer reaction
D. a dehydration reaction
E. a hydrophilic reaction
Question 17
For a hydrolysis reaction to occur there must be water and many monomers.
A. true
B. false
Question 18
In metabolism, which of the following molecules would be used for an immediate and quick source of energy?
A. protein
B. nucleic acids
C. lipids
D. water
E. carbohydrates
Question 19
Which of the following molecules is not a monosaccharide?
A. sucrose
B. glucose
C. ribose
D. galactose
E. deoxyribose
Question 20
To convert two monosaccharides into a disaccharide, which of the following reactions would be needed?
A. a hydrolysis reaction
B. an isomeric reaction
C. a dehydration reaction
D. a hydrophobic reaction
E. a hydrophilic reaction