EXAM 1
BIOLOGY 111
Dr.
Richard B. Brugam
1/22/98
1. The
chemical bonds in sodium chloride (NaCl) are:
a. Polar
Covalent Bonds b. Non-Polar Covalent Bonds c. Ionic Bonds
2. An
ionic bond is produced when:
a. Two
atoms completely exchange one or more electrons
b. Two
atoms share one or more electrons
c. Two
atoms remain neutral
d. One
atom disintegrates by radioactive decay
3. Many ionic compounds are soluble in water
because:
a.
Water is wet c. Water has polar covalently bonded molecules
b. Water
is an ionic compound itself d. Water has non-polar covalent bonds
4. What
are the subunits of starches?
a.
Sugars b. Amino acids c. Fatty acids d. Nucleotides
5. Both
carbohydrate and lipid are important as energy storage products.
a.
True b. False
6. Starches
are
a.
Proteins involved in the synthesis of chemical compounds c. Structural compounds in plants
b. Energy
storage compounds in plants d. Photosynthetic pigments
7. The
chemical glucose is
a. A
carbohydrate b. An amino acid c. A fat d. None of these
8. Cholesterol
is
a.
A carbohydrate
b. A lipid c. A protein d. A
nucleic acid
9. Radioactivity
results because:
a. Cells
are alive
b. The
atomic nucleii of some elements are unstable and shoot out parts of their
nuclei
c. Electrons
are exchanged between atoms
d. Cosmic
rays cause it
10. A covalent bond is produced when:
a.
Two atoms exchange one or more electrons c. Two atoms remain neutral
b. Two
atoms share one or more electrons d. One atom disintegrates by radioactive decay
11. The nucleus of an atom contains
a.
Positrons b. Electrons c.
Placebos d. Protons
12. Which of the following contains non-polar
covalent bond.
a. NaCl
- sodium chloride b. H2O - water c. H2 - hydrogen
13. All living organisms are slightly
radioactive. Why?
a. They
contain a radioactive form of carbon - C-14
b. They
have all been exposed to debris from the chernobyl explosion
c. They
all have proteins
d. Radioactivity
is a characteristic of life
14. A starch is made up of how many sugar
sub-units.
a. 1
b. 2 c.
3 d. many
15. Cellulose is a major component of paper. It is a:
a.
Polypeptide b. Lipid c. Protein d. Polysaccharide
16. An astronomer cannot do experiments on his
subject. Can he test hypotheses?
a.
Yes b. No
17. What is the placebo effect?
a.
An experimental control.
b. When
a medicine that is known to be ineffective appears to improve the patient’s
condition.
c. When
an effective medicine causes an improvement in the patient’s condition.
d. An
experimental manipulation.
18. “The moon is made out of green cheese” is a
testable scientific hypothesis.
a.
True b. False
19. An hypothesis is:
a. A
kind of South American mammal c. A statement about the natural world that is
testable
b. An
educated guess d. A scientific law
20. An ecologist is testing the effect of a
chemical on a lake. He partitions the
lake into two halves. The chemical
cannot go through the partition. He
adds the chemical to one half and leaves the other half untreated. He observes the changes that occur in both
halves. What can we call the untreated
half?
a.
The experimental half c. The placebo
b.
The control half d. The unknown half
21. Why are there experimental controls?
a.
So that unethical processes do not occur.
b. So
that the scientist can show that the effects that he sees are actually a result
of his experimental treatment.
c. To
prevent the experiment from blowing up.
d. To
avoid offending people.
22. Some radioactive isotopes are made by humans.
a.
True b. False
23. An atom has 12 protons in its nucleus. How many electrons would you expect in the
energy levels around this atom. Assume
the atom has no net charge.
a.
6 electrons b. 92 electrons c. 12
electrons d. 7 electrons
24. What charge is on a neutron?
a.
Positive b. Negative c. No
charge
25. Electrostatic force is the force that
a. Holds
the protons in the nucleus of an atom
b. Causes
water molecules to be attracted to one another
c. Causes
apples to fall to the earth
d. Holds
electrons around nucleii of atoms