Chapter 02 – The Nature of Life?
Chapter 02
The Nature of Life?
Multiple Choice Questions
1. Which of the following is NOT a form of metabolism?
2. Which of the following metabolic activities of plants produces sugars?
Chapter 02 – The Nature of Life?
3. Determination of whether something is a living organism or a nonliving object is based on
___________.
4. As living individuals grow and reproduce their response to environmental stimuli may
include ___.
5. Which of the following is NOT an attribute of ALL living organisms?
Chapter 02 – The Nature of Life?
6. Which of the following is NOT an attribute of ALL living organisms?
7. If a plant is wounded, some cells near the wound site begin dividing and seal off the wound.
Once the wound is sealed, the cells stop dividing. The criterion /criteria of life illustrated here
is/are
8. Reproduction in living organisms results in __________________.
Chapter 02 – The Nature of Life?
9. Response to a stimulus ___________________.
10. The basic ‘stuff of the universe’ or matter has which of the following characteristics?
11. At present the number of elements naturally occurring on earth is __________.
Chapter 02 – The Nature of Life?
12. The number of protons and electrons in a neutral atom is
13. The atomic number of an element is based on
14. The volume of space in which a given electron occurs 90% of the time is called
Chapter 02 – The Nature of Life?
15. The element with the lowest atomic number and/or mass is
16. Electrons are essentially
17. Which of the following carries a single positive charge?
Chapter 02 – The Nature of Life?
18. The mass of the protons and neutrons added is the
19. What is the maximum number of electrons that can occupy the innermost electron
orbital?
20. Unfilled positions within an electron orbital tend to make the atom
Chapter 02 – The Nature of Life?
21. A substance consisting of two or more elements united by chemical bonds in a definite
ratio is called a
22. The bonds that hold atoms together do so through the sharing or transfer of
23. Which type of chemical bond involves the transfer of electrons?
Chapter 02 – The Nature of Life?
24. Carbon has an atomic number of 6. How many electrons does carbon have in its first and
second electron orbitals, respectively?
25. If there is an asymmetric charge distribution on a molecule creating a positively charged
sector and a negatively charged sector, the type of molecule resulting would be
_____________.
Chapter 02 – The Nature of Life?
27. An acid is a compound that
28. In photosynthesis, light energy is converted into chemical energy plus heat energy.
According to the first law of thermodynamics,
Chapter 02 – The Nature of Life?
29. When an acid and a base are mixed together, which of the following is produced?
30. Which of the following pH values is considered neutral (i.e., neither acidic nor basic)?
31. Laws pertaining to energy are called laws of ___________________.
Chapter 02 – The Nature of Life?
32. Covalent bonds between molecules inside living cells are often formed or broken through
33. Classes of proteins called ___________________ function as organic catalysts for
chemical reactions in cells.
34. ________________ polymers serve as the genetic memory in living cells.
Chapter 02 – The Nature of Life?
35. Structural and functional molecules making up a cell have a skeleton of
___________________.
36. Which of the following is NOT a major component of protoplasm?
37. The basic units or subunits of which a protein is composed are _____________.
Chapter 02 – The Nature of Life?
38. Compounds that consist of carbon, hydrogen, and oxygen in a ratio of CH2O are
___________.
39. Each nucleotide of a DNA molecule consists of a nitrogenous base plus _____________.
40. The number of naturally occurring amino acids is ________________.
Chapter 02 – The Nature of Life?
41. What type of chemical bond joins amino acids together?
42. The linear sequence of amino acids in a polypeptide chain is called the ____________.
43. If a fatty acid contains three or more double bonds between the carbons in the carbon
chains, it would be _______________.
Chapter 02 – The Nature of Life?
True / False Questions
44. Callose is produced on the bark of a plant that has been damaged.
Blooms: 1. Remember
45. Isotopes of an element have the same chemical characteristics but slightly different atomic
mass due to differing number of neutrons.
46. Two different atoms, each with 7 electrons in their outmost energy shell, may share two
pairs of electrons; that is, a double bond is formed between the two atoms.
47. A base is a compound that releases hydrogen ions when dissolved in water.
Chapter 02 – The Nature of Life?
48. Hydrolysis of starch involves the addition of water molecules to the starch molecule.
49. If a lipid has its fatty acids attached to a glycerol molecule, it is called a wax.
50. About 50% of the cytoplasm including structures within are composed of carbon,
hydrogen, oxygen and nitrogen. The other 50% includes phosphorous, sulfur, potassium and
calcium.
51. An ion is neither positively nor negatively charged.
Chapter 02 – The Nature of Life?
52. Nitrogenous bases refer to specific types of amino acids
53. Protein molecules differ from those of carbohydrates and lipids in having nitrogen
present.
54. Peptide bonds link the building blocks of carbohydrates together.
55. Nucleotides and amino acids are both “building blocks” of larger molecules.
Chapter 02 – The Nature of Life?
56. The function of a protein will be either less effective or lost if the three-dimensional shape
of the protein is altered.
57. Assimilation is the conversion of raw materials into protoplasm and other cell substances.
58. Potential energy can be converted to kinetic energy.
59. The combining capacity of an atom or ion is referred to as its valence.
Chapter 02 – The Nature of Life?
60. If hydrogen atoms are attached to every available attachment point of fatty acid carbon
atoms in a fat, the fat is said to be unsaturated.
61. All hormones and enzymes are lipids.