-KEY-
Exam #1
Biology 102 Fall 2001
Version A
1) In the film "Mysteries of Mankind" how large of a difference is there between the DNA of
chimpanzees and our own DNA?
A) They differ by only 1%
B) They differ by 90%
C) Chimpanzees do not have DNA
D) There are no differences between chimpanzee DNA and our own DNA
2) What is the maximum number of atoms that an oxygen atom can form covalent bonds with?
A) 1
B) 2
C) 3
D) 4
E) 5
3) Which of the following is true for all carbon atoms?
A) They all have the same number of electrons
B) They all have the same number of neutrons
C) They all have the same number of protons
D) All of the above
4) Which of the following statements best describes the plasma membrane
surrounding animal cells such as your body’s own cells?
A) The membrane is highly permeable to all substances
B) The membrane is impermeable to all substances
C) Some substances can cross the membrane easily, others cannot
D) My cells do not have a plasma membrane only bacteria have this structure
5) DNA in the nucleus is combined with proteins to form chromatin.
A) True
B) False
6) Which of the following is an energy source used by all living cells?
A) Proteins
B) Enzymes
C) ATP
D) DNA
E) Ribosomes
7) The pH scale measures the concentration of what?
A) Electrons
B) Water molecules
C) Acids
D) H+
E) Neutrons
Matching
Use the following list to answer questions 8, 9, 10, 11, and 12. Each answer may be used once, more than once, or not at all.
A) Nucleus
B) Ribosome
C) Mitochondrion
D) Endoplasmic Reticulum
E) Golgi Aparatus
8) Controls the destination of proteins made in the endoplasmic reticulum
E)
9) Involved in translating RNA into protein
B)
10) Energy producing organelle of eukaryotic cells
C)
11) Defining organelle of eukaryotic cells
A)
12) Site of lipid synthesis in the cell
D)
13) What is one of the functions of the central vacuole of plant cells?
A) Energy production
B) Site of chlorophyll function
C) Storage of sugars
D) Protein synthesis
E) Contains the cell’s DNA
14) As you know two things are necessary for the process of evolution to occur, the production of mutational changes in DNA and______________.
A) Selection for and against mutants in the population by man or nature
B) Millions and millions of years of time
C) Geographic isolation
D) Interbreeding of populations
E) Large numbers of offspring
15) What is homeostasis?
A) A rapid response to external stimuli
B) Maintenance of constant conditions
C) A type of chemical reaction
D) The use of homeopathic medicine to treat illness
E) A non-scientific thought process
16) Which types of bonds formed between biological molecules are the strongest?
A) Ionic bonds
B) Hydrogen bonds
C) Covalent bonds
17) How many naturally occurring chemical elements are there on earth?
A) Roughly 12
B) Roughly 10,000
C) Roughly 1,000,000
D) Roughly 100
E) No one knows
18) Cholesterol is an important part of animal cell membranes, it is also used for:
A) A universal source of energy by all cells.
B) Making the cell walls of bacteria and plants
C) A precursor to make hormones
D) The storage of electrons
E) A pigment in the skin of animals
19) Which of the following statements is true regarding biological polymers?
A) Water is used in the assembly and breakdown
B) They can vary greatly in length
C) They can be used to store information
D) They can be used to store energy
E) All of the above
20) How many different types of nucleotides are used to form a DNA molecule?
A) 2
B) 4
C) 12
D) 20
E) 150
21) What do monosaccharides refer to?
A) Polysaccharides made of only one type of sugar molecule
B) Un-branched polysaccharides
C) Individual sugar molecules such as glucose
D) Sugar structures in the absence of water
E) None of the above
22) Which of the following macromolecules are not true polymers?
A) Triglycerides
B) Proteins
C) Polysaccharides
D) Polynucleotides
E) Starch molecules
23) ATP the energy currency of all cells is what type of molecule?
A) A hydrocarbon
B) A nucleotide
C) An amino acid
D) A protein
24) All amino acids are hydrophilic and can interact with water equally
A) True
B) False
25) How many membrane bound compartments does a chloroplast contain?
A) 1
B) 2
C) 3
D) 4
E) 5
26) The control group in an experiment is under the control of the experimenter and receives some treatment which is being studied (drug, chemical, etc.)
A) True
B) False
27) How many nucleotides are used to encode each individual amino acid for the
translation of RNA into proteins?
A) 1
B) 2
C) 3
D) 4
E) The number varies for different amino acids
28) DNA and proteins never interact normally in the cell
A) True
B) False
29) Where are proteins synthesized in animal cells?
A) The nucleus
B) The nucleolus
C) The mitochondrion
D) The Golgi apparatus
E) The cytoplasm
30) What happens to organelles such as mitochondria that have stopped functioning?
A) They are expelled from the cell into the surrounding environment
B) The remain in the cytoplasm and accumulate with age
C) They are broken down and recycled
D) Organelles never stop functioning until the death of the cell
31) Water molecules cannot pass easily through a cell’s membranes
A) True
B) False
32) Which of the structures of eukaryotic cells is not found in a prokaryotic cell?
A) A nucleus
B) A plasma membrane
C) Ribosomes
D) None of these structures is found in a prokaryotic cell
E) All of these structures are found in a prokaryotic cell
33) A friend of yours describes an "experiment" he performed. Rather than following his usual route to biology class, he tried a "short cut". Since he got to class 5 minutes earlier he wants you to adopt his short cut as well. What is wrong with his scientific method?
A) He only tried on alternate route
B) Taking a different route to class isn’t really an experiment
C) He did not include a control
D) He hasn’t been trained as scientist so he can’t perform experiments
34) Intermediate filaments are the largest components of the cytoskeleton
A) True
B) False
35) Molecules containing only hydrogen and carbon can be quite soluble in water.
A) True
B) False
36) Saturated fats are characterized by what property?
A) They have the maximum number of double bonds in their fatty acids
B) They contain extremely long fatty acids
C) Their fatty acids contain all single bonds
D) They are more water soluble than unsaturated fats
37) What type of bond is formed by atoms that share electrons equally?
A) Ionic Bond
B) Covalent Bond
C) Hydrogen Bond
D) Valence Bond
E) Equalateral Bond
38) Cilia are only found in small numbers (1 or 2 ) on the surface of animal cells
which possess them.
A) True
B) False
39) How many phospholipids are used to make up the thickness of the plasma
membrane of a cell?
A) 1
B) 2
C) 4
D) 12
E) Hundreds
40) What is osmosis?
A) The crawling of a cell on a surface
B) The diffusion of ions down a gradient
C) The diffusion of water across a semipermeable membrane
D) A property of the cytoskeleton
E) A disease carried by insects in Africa
Extra Credit!
41) In the film mysteries of mankind, where were most of the ancient hominid skeletons found?
A) New Jersey
B) South America
C) Australia
D) Africa
E) Antarctica
42) Detergent molecules like those found in "Mr. BubbleTm" have properties similar to what
kinds of biological molecules?
A) Proteins
B) Fats
C) Polynucleotides
D) Polysaccharides
E) Phospholipids