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GENERAL BIOLOGY 1 FALL 2017-LENTZ EXAM 1
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GENERAL BIOLOGY 1FALL 2017-LENTZ
EXAM 1
BE SURE TO (1 point):
Bubble in your n#
Bubble in the test form (last page)
Read all questions carefully
1. Humans are eukaryotes.
A. True
B. False
2. Which statement is not a component of the cell theory?
A. The earliest cells had no nucleus.
B. All organisms are made of cells.
C. All cells come from pre-existing cells.
D. All of the above are components of the cell theory.
3. Which of the following is not a property of life?
A. Living things have the ability to store and use information.
B. Living things have the ability to create energy.
C. Living things are composed of cells.
D. Living things undergo evolutionary adaptation.
E. Living things have the ability to replicate.
4. There are some individuals in the human population that have heritable traits that make
them resistant to HIV (the AIDS virus) infection. In central Africa, where HIV infection rates are
high, humans must be evolving.
A. True
B. False
5. Pasteur's results from his swan-neck flask experiments showed that:
A. With enough time, any sterile environment will become contaminated with cells.
B. When growth medium is not contaminated by pre-existing cells, the growth medium
remains sterile.
C. When growth medium is not contaminated by pre-existing cells, cells still grow there.
6. Which choice is an example of artificial selection?
A. The long neck of a giraffe.
B. Unique breeds of dogs.
C. Ants trying to find their nest while walking on stilts.
D. All of the above result from artificial selection.
, 7. You have isolated and purified a new species of single-celled organism from Lake
Okeechobee and you want to place this new species in the appropriate branch of the tree of
life. You sequence the ribosomal RNA genes from these cells and discover that for one
particular region of the ribosomal gene (the rRNA) the RNA sequence is AAUGAAGG.
You have sequences from the same region of the ribosomal genes from each of these
organisms: bacteria, eukaryote, and archaea, which are listed below.
bacteria AUAGAUGG
eukaryote AAAGAAGG
archaea AAUGGAGU
Based on these sequence results, to which branch of the tree of life should you assign your new
organism?
A. Archaea
B. Bacteria
C. Bacteria and archaea
D. Eukaryote
E. There is not enough information
8. Sarah and Todd go to a new restaurant and do not like the food they are served. Their
hypothesis is that if they go to the restaurant again, they will not like the food. If they continue
to follow the scientific method, what should they do next?
A. Never go near the restaurant again and tell all their friends to avoid it.
B. Go back to the restaurant several times and order different items.
C. Survey other customers to see if they like the food.
D. Call the city health inspectors and suggest they inspect the restaurant.
E. Get some friends to go to the restaurant and order what Sarah and Todd didn’t like.
9. In an experiment, investigators try to control all of the variables except one—the one that
tests the hypothesis. Which of the following reasons is the primary rationale for controlling
variables in an experiment?
A. To enable investigators to repeat the test.
B. To eliminate alternative explanations for the results of an experiment.
C. To reduce statistical reliability.
D. To create a control group.
10. One ml (milliliter) of an experimental drug diluted in a saline (salt) solution is injected into
20 pregnant mice to determine possible drug side effects. Which of the following is a suitable
"control" for this experiment?
A. 20 male mice injected with 1 ml of saline.
B. 20 male mice injected with 1 ml of the drug.
C. 20 pregnant mice injected with 1 ml of saline.
D. 20 non-pregnant mice injected with 1 ml of the drug.
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