BIO 201 Exam 1 Sample, Spring 2011
American University of Beirut · General Biology I · 2 pages
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BIO 201
Which of the following is in a different chemical?
category than the others?
A. Cytosine
B. Thymine
C. Arginine
D. Guanine
E. Uracil
The contractile vacuole of Euglena decreases its
rate of
contraction when the organism is transferred
from fresh
water to sea water. This is explained by
A. an increase in the osmotic pressure of the
environment.
B. a decrease in the osmotic pressure of the
environment.
C. the nitrogenous wastes can remain in the cell
because of a higher salt concentration outside the
cell.
D. excess salts are eliminated without the loss of
water.
E. salt inhibits the contractile apparatus.
Which of the following is a correct association?
A. Mitochondria : transports materials from the
nucleus to the cytoplasm
B. Golgi apparatus : modification and glycosylation
of
proteins
C. Endoplasmic reticulum : selective barrier for the
cell
D. Ribosome : digestive enzymes most active at an
acid
pH
E. Lysosomes : membrane-bound organelles which
convert fat into sugars
Which of the following is NOT a steroid?
A. Cholesterol
B. Vitamin D
C. Testosterone
D. Thyroxine
E. Cortisol
What level(s) of protein structure is
characterized by α-
helices and β-sheets?
A. Primary
B. Secondary
C. Tertiary
D. Quaternary
E. Secondary and tertiary
What is the major difference between
prokaryotes and
eukaryotes?
A. Only eukaryotes have a cell wall
B. Eukaryotes are all autotrophic.
C. Eukaryotes lack ribosomes.
D. Prokaryotes have no nuclear membrane.
E. Prokaryotes have mitochondria.
In which of the following would you find cristae?
A. Endoplasmic reticulum
B. Mitochondria
C. Nucleus
D. Nucleolus
E. Ribosomes
Which enzyme changes disaccharides to
monosaccharides?
A Lactase
B. Kinase
C. Zymogen
D. Lipase
E. Phosphorylase
Which of the following statements about
evolution is correct?
A. Lamarck's theory of use and disuse adequately
describes why giraffes have long necks.
B. Darwin's theory of natural selection relies solely
on genetic mutation.
C. Darwin's theory explains the evolution of man
from present day apes.
D. Darwin's theory of natural selection relies solely
on environmental conditions.
E. Natural selection is the process in which random
mutations are selected for survival by the
environment.
Which of the following is not a lipid derivative?
A. Waxes
B. Steroids
C. Carotenoids
D. Albumins
E. Lecithin