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Biology 1020: Assignment #1 (units 1 and 2)
Name: _______________________________
Part A: Multiple Choice (50 marks) Circle the most appropriate answer.
1. This “level of organization” refers to all the individuals of a single species in a particular area.
a. ecosystem
b. community
c. organism
d. population
2. This “level of organization” refers to groups of cells working together.
a. tissues
b. organs
c. organ systems
d. an organism
3. Which represents the correct order from broadest level of organization to most specific?
a. biosphere, ecosystem, community, population
b. biosphere, community, ecosystem, population
c. ecosystem, biosphere, community, population
d. population, biosphere, community, ecosystem
4. The branch of biology that deals with the classification of organisms is known as:
a. cytology
b. mycology
c. taxonomy
d. zoology
5. The branch of biology dealing with the study of animals is known as _____________.
a. zoology
b. mycology
c. entomology
d. physiology
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6. If a hypothesis is supported over and over again by various scientists, over time it becomes
a(n) ____________.
a. deduction
b. conclusion
c. world-view
d. theory
7. Which represents the usual order for the scientific method?
a. conduct an experiment, form a hypothesis, draw a conclusion, analyze data
b. form a hypothesis, conduct an experiment, draw a conclusion, analyze data
c. conduct an experiment, form a hypothesis, analyze data, draw a conclusion
d. form a hypothesis, conduct an experiment, analyze data, draw a conclusion
8. If you were conducting an experiment to determine whether the heart rate of fish changes
increases with increasing water temperature, what would be the independent variable?
a. the type of tank
b. the water temperature
c. the heart rate
d. all of the above
9. The variable(s) that are kept equal or constant in all treatments in an experiment are known
as the:
a. independent variables
b. dependent variables
c. control variables
d. all of the above
10. The smallest unit of matter that still retains the properties of the element is known as a(n):
a. molecule
b. atom
c. compound
d. element
11. If you were conducting an experiment to determine whether the heart rate of fish changes
increases with increasing water temperature, what would be the dependent variable?
a. the type of tank
b. the water temperature
c. the heart rate
d. all of the above
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12. Which of the following is NOT a characteristic of life?
a. homeostasis
b. reproduction
c. stability of cells
d. respiration
13. Which of the following levels of organization goes from lowest to highest?
a. cell, organ, tissue, organ system
b. organ, tissue, organ system, cell
c. cell, tissue, organ, organ system
d. cell, organ system, organ, tissue
14. The variable that the experimenter measures is known as the ____________ variable, and
the variable that is changed by the experimenter is known as the ____________ variable.
a. independent, dependent
b. dependent, independent
c. control, dependent
d. independent, control
15. A study is conducted to determine the effect of the amount of exercise on fitness level.
Which of the following is the dependent variable?
a. the amount of exercise
b. the fitness level
c. the age of the participants
d. the temperature of the room
16. Which of the following is NOT one of the four major categories of large molecules found in
organisms?
a. amino acids
b. carbohydrates
c. lipids
c. nucleic acids
17. Before conducting an experiment, the scientist makes an educated guess about the results
of the experiment, this is known as a(n) ________________.
a. theory
b. deduction
c. interpretation
d. hypothesis
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18. ___________ science is an approach to science that uses the scientific method, while
____________ science is an approach to science that is descriptive in nature.
a. discovery; hypothesis-driven
b. hypothesis-drive; discovery
c. investigative; experimental
d. discovery; deductive
19. A neutral group of atoms that act as a unit is known as a(n) _____________.
a. element
b. compound
c. mixture
d. molecule
20. The study of fungi is known as _______________.
a. cytology
b. ecology
c. zoology
d. mycology
21. A scientist wanted to determine the effect of water temperature on fish growth. What is an
example of a control variable?
a. water temperature
b. fish growth
c. size of the tank
d. all of the above
22. Biology is the study of __________.
a. chemicals
b. animals
c. plants and animals
d. life
23. Compounds that do not contain carbon are known as:
a. organic compounds
b. inorganic compounds
c. lipids
d. carbohydrates
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24. DNA is an example of a:
a. carbohydrate
b. lipid
c. protein
d. nucleic acid
25. What two elements make up a water molecule?
a. nitrogen and oxygen
b. lipids and carbohydrates
c. nitrogen and hydrogen
d. hydrogen and oxygen
26. Which is true about water?
a. it is composed of nitrogen and highly charged
b. it is V-shaped, giving it a slight charge
c. it is spherical shaped with a medium charge
d. it is composed of double bonds that make it neutral
27. What are the monomers of carbohydrates?
a. monosaccharides
b. amino acids
c. nucleotides
d. fatty acids
28. What type of substance is slippery and bitter tasting?
a. acids
b. cases
c. neutral solutions
d. all of the above
29. Monomers are linked together and in the process water molecules are released by:
a. hydrolysis
b. catabolism
c. photosynthesis
d. dehydration synthesis
30. Reactions that build larger molecules from smaller molecules is known as a(n):
a. catabolic reaction
b. anabolic reaction
c. hydrolysis reaction
d. photosynthetic reaction
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31. Carbohydrates made of two linked sugars, such as maltose, are known as:
a. monosaccharides
b. disaccharides
c. polysaccharides
d. carbohydrates
32. These are complex carbohydrates such as glycogen and starch:
a. monosaccharides
b. disaccharides
c. polysaccharides
d. lipids
33. This type of fatty acid is free to move in any direction without any bends or kinks hindering
it:
a. saturated
b. unsaturated
c. glycerol
d. amino acid
34. Cholesterol and sex hormones are examples of:
a. nucleic acids
b. carbohydrates
c. anabolic steroids
d. steroids
35. The amino acid sequence of a protein is referred to as its:
a. final three-dimensional appearance
b. primary structure
c. anabolic structure
d. conformation
36. This property of water allows many, many substances to be taken into a mixture with water
easily.
a. surface tension
b. density
c. solvent
d. heat capacity
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37. The genetic material that organisms inherit form their parents is:
a. DNA
b. proteins
c. carbohydrates
d. lipids
38. Which of the following is not a part of a nucleotide?
a. deoxyribose
b. amino acid
c. a phosphate group
d. nitrogenous bases
39. How are the two DNA strands bonded to one another?
a. randomly
b. by the sugar-phosphate backbone
c. by the nitrogenous bases
d. magnetism
40. Which of the following has the shape of a double-helix?
a. a DNA molecule
b. a protein molecule
c. a carbohydrate molecule
d. a lipid
41. The sum total of all the chemical reactions that occur within cells is known as:
a. anabolism
b. catabolism
c. metabolism
d. photosynthesis
42. The branch of biology that deals with the study of the structure of organisms is known as:
a. anatomy
b. physiology
c. cytology
d. mycology
43. The branch of biology that deals with the study of insects is known as
a. anatomy
b. entomology
c. cytology
d. physiology
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44. This characteristic of living things refers to those processes that increase the amount of
living substance in an organism.
a. homeostasis
b. metabolism
c. respiration
d. growth
45. This characteristic of living things refers to the traits that improve an organism’s ability to
survive in a particular environment.
a. homeostasis
b. adaptations
c. metabolism
d. growth
46. Which of the following is the best, most readily-testable hypothesis?
a. Red cars are cooler.
b. Crackers make people happy.
c. Tylenol is better than Advil.
d. Rats will eat milk chocolate more readily than dark chocolate.
47. In an experiment to investigate whether the amount of sugar in hummingbird feeders
affects the number of birds that visit a feeder, what is the dependent variable?
a. sugar concentration
b. number of birds visiting feeder
c. type of sugar
d. type of feeder
48. The branch of biology dealing with the study of the functions and activities of life or living
matter is known as
a. anatomy
b. physiology
c. cytology
d. mycology
49. Observing a DNA molecule and describing it in detail would be an example of:
a. discovery science
b. hypothesis-driven science
c. experimental science
d. the scientific method
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50. What is the function of a buffer?
a. to make a solution more acidic
b. to react with bases at lower pH values
c. to keep the pH relatively constant when small amounts of acid or base are added
d. to speed up chemical reactions in the presence of acids
Part B:
1. A study was conducted to determine if the amount of sleep affects reaction time. Group 1
received no sleep, Group 2 received 5 hours of sleep, and Group 3 received 10 hours of sleep. (5
marks)
State the independent variable. _____________________________________
State the dependent variable. _______________________________________
Suggest three controlled variables that the experimenter should use.
2. Answer any 5 of the following (10 marks)
a.
b.
c.
d.
e.
f.
g.
h.
Describe the difference between a dehydration synthesis and hydrolysis
reaction.
Explain how DNA is duplicated and how the structure of DNA helps make this
process easier.
Describe the role of any 2 of the following: glycogen, starch, cellulose
Compare and contrast triglyceride fats with steroids.
Compare and contrast saturated and unsaturated fats.
Describe any 3 features common to all living things.
List and explain any 2 properties of water that are vital to life.
Compare and contrast acids, bases and buffers.