Download File - Mastep4802

Biology
l. A scientific theory is:
(A) Another word for hypothesis
(B) A well-tested explanation that unifies a broad range of observations (C) the same as the conclusion of an
experiment
(D)the first step in a controlled experiment
2. The statement "the worm is 2 cm long" is a(n):
(A) quantitative observation
(B) Qualitative observation
(C) Inference
(D) hypothesis
3. An instrument that produces images by focusing light rays is called a(n):
(A) light microscope
(B) Transmission electron microscope
(C) Scanning electron microscope
(D) Electronic balance
4. The term spontaneous generation means that:
(A) living things evolve over time
(B) A maggot is part of the life cycle of a fly
(C) living things arise from other living things
(D) living things can arise from nonliving matter
5. The process by which organisms keep their internal conditions relatively stable is called:
(A) metabolism
(B) A genome
(C) homeostasis
(D) evolution
6. Which of the following statements about a controlled experiment is true?
(A) All the variables must be kept the same.
(B) Controlled experiments cannot be performed on living things.
(C) Scientists always use controlled experiments.
(D) Only one variable is studied at a time.
7 The process in which cells from two different parents unite to produce the first cell of a new organism is
called:
(A) Development
(B) Asexual reproduction
(C) Sexual reproduction
(D) Homeostasis
8. To be useful in science, a hypothesis must be:
(A) measurable
(B) Testable
(C) Observable
(D) Correct
1
9. An inference is:
(A) The same as an observation
(B) A logical interpretation of an observation
(C) a statement involving numbers
(D) A way to avoid bias
10. In a chemical reaction, a reactant binds to an enzyme at a region known as the:
(A) catalyst
(B) Product
(C) Substrate
(D) Active site
1l. The positively charged particle in an atom is the:
(A) neutron
(B) Ion
(C) Proton
(D) Electron
l2. An enzyme speeds up a reaction by:
(A) lowering the activation energy
(B) raising the activation energy
(C) releasing energy
(D) Absorbing energy
l3. Two or more different atoms are combined in definite proportions in any:
(A) symbol
(B) Isotope
(C) Element
(d) Compound
14. Proteins are polymers formed from:
(A) lipids
(B) Carbohydrates
(C) Amino acids
(D) Nucleic acids
15. A covalent bond is formed by the:
(A) transfer of electrons
(B) Sharing of electrons
(C) Gaining of electrons
(D) Losing of electrons
16. In polymerization, complex molecules are formed by the joining together of:
(A) monomers
(B) Polymers
(C) Carbohydrates
(D) Macromolecules
17. A compound that produces hydrogen ions in solution is a(n):
2
(A) salt;
(B) Polymer;
(C) Acid;
(D) Base
18. When you shake sugar and sand together in a test tube, you cause them to form a:
(A) compound
(B) Suspension
(C) Solution
(D) Mixture
19. Which organelle converts the chemical energy in food into a form that cells can use?
(A) Mitochondrion
(B) Chloroplast
(C) Chromosome
(D) Nucleolus
20. A tissue is composed of a group of: (A) related organelles
(B) Similar cells
(C) Organ systems;
(D) Related Organs
21. In many cells, the structure that controls the cell's activities is the: (A) cell membrane
(B) Organelle
(C) Nucleolus
(D) Nucleus
22. If a cell of an organism contains a nucleus, the organism is a(n): (A) plant
(B) Animal
(C) Eukaryote
(D) Prokaryote
23. Despite differences in size and shape, all cells have cytoplasm and a: (A) cell wall
(B) Nucleus
(C) Cell membrane
(D) Mitochondrion
24. The products of photosynthesis are: (A) sugars and oxygen
(B) Sugars and carbon dioxide
(C) Water and carbon dioxide
(D) Hydrogen and oxygen
25. Which of the following are autotrophs? (A) Impalas
(B) Plants
(C) Leopards
(D) Mushrooms
26. The leaves of a plant appear green because chlorophyll: (A) reflects blue light
(B) Absorbs blue light
(C) Absorbs green light
(D) Reflects green light
27. In addition to light and chlorophyll, photosynthesis requires: (A) water and carbon dioxide
(B) Oxygen and carbon dioxide
3
(C) Water and oxygen
28. One of the principal chemical compounds that living things use to store energy is: (A) DNA
(B)ATP
(C) H2O
(D) CO2
29. Information gathered from observing a plant that grows 3 cm over a two-week period results in:
(A) Inferences
(B) Variables
(C) Hypotheses
(D) Data
30. Scientific hypotheses must be proposed in a way that: (A) ensures that an experiment will be valid
(B) enables them to be proved valid
(C) Enables them to be tested
(D) Doesn’t contradict previous hypotheses
31. A controlled experiment allows the scientist to isolate and test: (A) a single variable
(B) Several variables
(C) A mass of information
(D) A conclusion
32. The ability to reproduce results is an important part of any: (A) law
(B) Experiment
(C) Theory
(D) Hypothesis
33. A theory:
(A) is always true
(B) Is the opening statement of an experiment (C) may be revised or replaced
(D) Is a problem to be solved?
34. Which of the following is NOT a characteristic of all living things? (A) Growth and development
(B) Ability to move
(C) Response to the environment
(D) ability to reproduce
35. The amount of light and temperature are examples of:
(A) methods of energy production
(B) Factors necessary for life
(C) Factors that affect reproduction
(D) Factors to which living things respond
36. To observe a small living organism, a scientist might use a(n): (A) compound light microscope
(B) Electron microscope
(C) TEM
(D) Electronic balance
37. Which of the following is NOT considered a safety procedure? (A) Read all the steps in your activity
4
before doing it.
(B) If in doubt about any part of an activity, trust your instincts
(C) Follow your teacher's instructions.
(D) Follow the textbook direction exactly.
38. Because you may come in contact with organisms you cannot see, what safety procedures MUST be
followed?
(A) Read over your activity.
(B) Open the windows of the laboratory.
(C) Do not wear long sleeves.
(D) Wash your hands thoroughly after completing the activity.
39. The space surrounding the nucleus of an atom contains: (A) electrons
(B) Ions
(C) Protons
(D) Neutrons
40. Which of the following makes up a molecule of water? (A) one atom of hydrogen and one atom of oxygen
(B) one atom of hydrogen and two atoms of oxygen
(C) two atoms of hydrogen, and one atom of oxygen
(D) one atom of sodium and one atom of chlorine
41. What type of electron is available to form bonds? (A) valence
(B) Nucleus
(C) Ionic
42. What type of ion forms when an atom loses electrons? (A) neutral
(B) Positive
(C) Negative
(D) Possibly negative or positive
43. The most abundant compound in most living things is: (A) carbon dioxide
(B) Sodium chloride
(C) Sugar
(D) Water
44. When salt is dissolved in water, water is the: (A) reactant
(B) Solution
(C) Solvent
(D) Solute
45. A substance with a pH of 6 is called: (A) an acid
(B) A base
(C) Both an acid and a base
(D) Neither an acid nor a base
46. Which cell structure contains the cell's genetic material and controls many of the cell's activities?
(A) Organelle
(B) Cell envelope
(C) Cytoplasm
5
(D) Nucleus
47. Cells fall into two broad categories, depending on whether they: (A) have a cell wall
(B) Contain genetic material
(C) Have a nucleus
(D) Contain chloroplasts
48. Which of the following is a function of the cell membrane? (A) Keeps the cell wall in place
(B) regulates which materials enter and leave the cell
(C) stores water, salt, proteins, and carbohydrates
49. Energy is released from ATP when:
(A) A phosphate group is added
(B) A phosphate group is removed
(C) Adenine bonds to ribose
(D)ATP is exposed to sunlight
50. Which of the following are used in the overall reactions for photosynthesis?
(A) Carbon dioxide
(B) Water
(C) Light
(D) All of the above
6