AP Biology Midterm
Study online at https://quizlet.com/_ff856g
1. Which of the following best describes what causes Water molecules
water molecules to exhibit properties such as cohe- are polar, hav-
sive and adhesive behavior? ing partially pos-
itive and partially
negative ends.
2. Which statement correctly compares the pH of water The pH of water is
to that of other substances? neutral; it is high-
er than the pH
of acids and low-
er than the pH of
bases.
3. The slight negative charge at one end of one water A hydrogen bond
molecule is attracted to the slight positive charge
of another water molecule. What is this attraction
called?
4. Which of the following best explains how water is able The positive and
to dissolve ionic substances? negative charges
of the water mol-
ecule pull on the
negative and pos-
itive ends of the
ionic molecule to
break them apart.
5. During winter's freezing temperatures, some plants The expansion of
can remove water from their cells to reduce the excess water as
amount of water that will freeze inside them. Why it turns to ice
would plants need to do this? inside the cells
would break the
cells apart.
6. Which of the following best describes how the densi- The density of wa-
ty of water differs from that of other substances? ter depends on its
temperature, un-
like other sub-
stances.
, AP Biology Midterm
Study online at https://quizlet.com/_ff856g
7. Carbon atoms are able to bond with other
carbon atoms to
form long chains
8. What is true of carbon atoms? They can form up
to four covalent
bonds.
9. Carbon atoms can form four single cova-
lent bonds
10. Why should farmers plant crops that improve the These crops have
levels of nitrogen in the soil during the winter? root nodules that
contain bacteria.
11. Bacteria in the soil convert ammonia into a form that Nitrogen cycle
can be reabsorbed by a plant. Which geochemical
cycle does this sequence describe?
12. Why are bacteria an essential part of the nitrogen Bacteria are re-
cycle? sponsible for fixing
nitrogen into us-
able forms for oth-
er organisms.
13. Carbohydrates are polymers composed of linked Proteins, carbohy-
monosaccharides. Which of the following is a true drates, and nucle-
statement about polymers? ic acids are all
polymers.
14. What process links monomers of carbohydrates? Spontaneous gly-
cosidic links
15. What are the functional units of a monosaccharide? Carbonyl and hy-
droxyl groups
16. Suppose you have an unknown chemical reaction Determine
involving carbohydrates. What is one way to test whether water is
whether the reaction is dehydration synthesis or hy- formed.
drolysis reaction?
, AP Biology Midterm
Study online at https://quizlet.com/_ff856g
17. Which of the following correctly lists the functions Energy storage,
lipids serve in the body? cell structure, sig-
naling
18. One of the properties of cellulose is that it is not Cell walls of plants
soluble in water. What would happen if cellulose was would no longer
water-soluble? maintain their rigid
form.
19. Why is the sequence of nucleotides important to the It retains and
properties of a nucleic acid? transmits impor-
tant biological in-
formation.
20. Why is the sequence of amino acids important to It determines how
the properties of a protein and determination of the the biochemi-
protein produced? cal folds into
a three-dimen-
sional structure.
21. Why is the sequence of monosaccharides important It stores ener-
to the properties of a carbohydrate? gy and provides
structural support
for cells.
22. How do components of a DNA molecule influence its Deoxyribose and
physical properties? phosphate, linked
by phosphodiester
bonds, form re-
peating units to
make up the back-
bone of DNA.
23. How do RNA's subcomponents affect its properties? Base pairing oc-
curs within an
RNA molecule
to give RNA
the three-dimen-
sional shape
Study online at https://quizlet.com/_ff856g
1. Which of the following best describes what causes Water molecules
water molecules to exhibit properties such as cohe- are polar, hav-
sive and adhesive behavior? ing partially pos-
itive and partially
negative ends.
2. Which statement correctly compares the pH of water The pH of water is
to that of other substances? neutral; it is high-
er than the pH
of acids and low-
er than the pH of
bases.
3. The slight negative charge at one end of one water A hydrogen bond
molecule is attracted to the slight positive charge
of another water molecule. What is this attraction
called?
4. Which of the following best explains how water is able The positive and
to dissolve ionic substances? negative charges
of the water mol-
ecule pull on the
negative and pos-
itive ends of the
ionic molecule to
break them apart.
5. During winter's freezing temperatures, some plants The expansion of
can remove water from their cells to reduce the excess water as
amount of water that will freeze inside them. Why it turns to ice
would plants need to do this? inside the cells
would break the
cells apart.
6. Which of the following best describes how the densi- The density of wa-
ty of water differs from that of other substances? ter depends on its
temperature, un-
like other sub-
stances.
, AP Biology Midterm
Study online at https://quizlet.com/_ff856g
7. Carbon atoms are able to bond with other
carbon atoms to
form long chains
8. What is true of carbon atoms? They can form up
to four covalent
bonds.
9. Carbon atoms can form four single cova-
lent bonds
10. Why should farmers plant crops that improve the These crops have
levels of nitrogen in the soil during the winter? root nodules that
contain bacteria.
11. Bacteria in the soil convert ammonia into a form that Nitrogen cycle
can be reabsorbed by a plant. Which geochemical
cycle does this sequence describe?
12. Why are bacteria an essential part of the nitrogen Bacteria are re-
cycle? sponsible for fixing
nitrogen into us-
able forms for oth-
er organisms.
13. Carbohydrates are polymers composed of linked Proteins, carbohy-
monosaccharides. Which of the following is a true drates, and nucle-
statement about polymers? ic acids are all
polymers.
14. What process links monomers of carbohydrates? Spontaneous gly-
cosidic links
15. What are the functional units of a monosaccharide? Carbonyl and hy-
droxyl groups
16. Suppose you have an unknown chemical reaction Determine
involving carbohydrates. What is one way to test whether water is
whether the reaction is dehydration synthesis or hy- formed.
drolysis reaction?
, AP Biology Midterm
Study online at https://quizlet.com/_ff856g
17. Which of the following correctly lists the functions Energy storage,
lipids serve in the body? cell structure, sig-
naling
18. One of the properties of cellulose is that it is not Cell walls of plants
soluble in water. What would happen if cellulose was would no longer
water-soluble? maintain their rigid
form.
19. Why is the sequence of nucleotides important to the It retains and
properties of a nucleic acid? transmits impor-
tant biological in-
formation.
20. Why is the sequence of amino acids important to It determines how
the properties of a protein and determination of the the biochemi-
protein produced? cal folds into
a three-dimen-
sional structure.
21. Why is the sequence of monosaccharides important It stores ener-
to the properties of a carbohydrate? gy and provides
structural support
for cells.
22. How do components of a DNA molecule influence its Deoxyribose and
physical properties? phosphate, linked
by phosphodiester
bonds, form re-
peating units to
make up the back-
bone of DNA.
23. How do RNA's subcomponents affect its properties? Base pairing oc-
curs within an
RNA molecule
to give RNA
the three-dimen-
sional shape
