HORT 201 - Interactive Practice Exam 1
INSTRUCTIONS
Choose the correct answer for each question by clicking the letter button.
Select only one answer for each question the first time through the exam.
Do this because the scoring system is kind of "weird"; it gives points for correct answers, but deducts points if multiple wrong answers are selected.
Your score will be shown only after you have selected a correct answer.

After you have finished the exam, you can go back and select answers until you have selected all the correct answers, then the following information will be given:
"Questions answered correctly first time:"
You can use this to also calculate your score, with each "first" correct answer worth 2 points.
 

1Which area of ornamental horticulture involves the culture and production of flowering and foliage plants?
nursery production
forestry
floriculture
floristry
olericulture

2_____ is the science and technology of culturing, utilizing and improving field crops (grain, fiber and forage crops).
forestry
agronomy
horticulture
pomology
olericulture

3Which tissue system has as its function protection from the environment and water loss?     
dermal tissue system
ground tissue system
peridermal tissue system
cortical tissue system
vascular tissue system

4The mesophyll of the leaf is a tissue in which tissue system?
dermal tissue system
ground tissue system
peridermal tissue system
cortical tissue system
vascular tissue system

5The cell types in a sweet potato that you eat are isodiametric, and have thin, non-lignified primary cell walls. What is their name?
collenchyma
sclerenchyma
fiber
parenchyma
amyloplast

6What is the name of the phenolic polymer that is deposited among the cellulose microfibrils of secondary cell walls to make them very tough and rigid?
pectin
protein
hemicellulose
lignin
suberin

7Where in the cell are the orange and yellow carotenoid pigments stored?
chromoplast
vacuole
microbody
elaioplast
chromosome

8Starch is a polymer of _____.
fructose
amino acids
glucose
nucleic acids
galacturonic acids

9Where is the starch stored in the cell?
elaioplast
amyloplast
chromoplast
vacuole
microbody

10Which layer of the cell wall has the cellulose microfibrils orientated parallel to the cell so the cell wall can expand as the cell grows?
middle lamella
secondary cell wall
plasmalemma
plasmodesmata
primary cell wall

11A protein is composed of a chain of _____.
glucose
amino acids
ribonucleic acids
deoxyribonucleic acids
phenolic compounds

12In the genetic code, which of the following is the correct bonding pair of nucleic acids in DNA?
adenine-uracil (A-U)
adenine-cytosine (A-C)
adenine-guanine (A-G)
adenine-amino acid (A-A)
adenine-thymine (A-T)

13Which of the following is the lateral meristem in stems that produces secondary xylem and phloem?
periderm
phellogen
intercalary meristem
vascular cambium
apical meristem

14A _____ is characterized by leaves that are either needle-like or scale-like.
monocot
gymnosperm
dicot
fern
algae

15Which organ of the plant has as one of its functions storage?
all may have storage as a function
stems
roots
leaves

16The _____ is the bud at the tip of a stem responsible for terminal growth.
tip bud
terminal bud
primary bud
axillary bud
proximal bud

17In the cross section of a herbaceous dicot stem in primary growth, what is the name of the outermost ring of cells?     
epidermis
exodermis
peridermis
endodermis
pericycle

18In the cross section of a monocot stem in primary growth, what is the name of the tubular structures that contain the xylem and phloem?
vein
midrib
pith
vascular bundle
pericycle

19In the root, the Casparian strip occurs in the cell walls of which ring of cells?
pericycle     
epidermis
endodermis
cortex
bundle sheath

20The _____ is the stalk of the leaflet of a compound leaf.
rachis
node
stipule
petiole
petiolule

21Which type of venation has the veins of the leaf arranged in a feather-like, net venation with lateral veins extending from a central midrib?
palmate
parallel
pinnate
featherate

22On leaves, the epidermis is covered with a waxy membrane called the _____.
suberin
periderm
pericarp
cuticle
Casparian strip

23Which part of a dicot leaf is specialized for gas exchange?
cuticle
palisade parenchyma
bundle sheath
spongy parenchyma
lenticel

24A hibiscus flower contains 5 petals, 5 sepals, 5 stamens and 1 pistil. Therefore, which of the following terms completely describes a hibiscus flower?
dioecious
both incomplete and imperfect
both incomplete and perfect
both complete and imperfect
both complete and perfect

25The _____ is the middle layer of the pericarp of the fruit.
mesocarp
mesophyll
endocarp
mesoderm
exocarp

26An oak tree has separate pistillate and staminate flowers, and they both occur on the same plant. Therefore, an oak tree is _____.
hermaphroditic
monogamous
parthenocarpic
dioecious
monoecious

27The _____ is an individual flattened, sack-like membrane that comprises the grana inside a chloroplast; contains the chlorophyll.
plasmalemma
stroma
stroma lamellae
thylakoid
dictyosome

28When water splits in the process of photosynthesis, what does it release that is immediately absorbed by chlorophyll?
electron
hydrogen
carbon dioxide
oxygen
ATP

29When does the Dark Reaction of photosynthesis occur?     
in both light and dark
only when no oxygen is present
only in the dark
only in light when the Light Reaction occurs
all the time

30The Light Reaction occurs in the _____.
stroma of chloroplast
matrix of mitochondrion
grana of chloroplast
inner membranes of mitochondrion

31Oxygen is a by-product of photosynthesis, and is produced by which reaction?
Krebs Cycle
Light Reaction
glycolysis
Dark Reaction
cytochrome system

32What is the name of the metabolic (chemical) energy source produced by the electron transport chain of the Light Reaction of photosynthesis?
glucose
electron
ethanol
oxygen
ATP

33C4 plants open their stomata during the _____.
night
day
both day and night

34Which type of photosynthesis occurs in desert plants as an adaptation to dry conditions?
CAM
C2
C3
C4

35Light _____ refers to the wavelength or color of light.
quantity
quality
luminescence
illuminence

36Chlorophyll mainly absorbs which colors of light?
red light only
green light only
blue light only
both red and blue light
both green and far red light

37Which pigment in the plant can assist chlorophyll in photosynthesis?
phytochrome
chlorochrome
anthocyanin
phytophyll
carotenoid

38Which single light source would be best for you to use to add light to your house plants in your house or apartment?
tungsten
quartz
fluorescent
high intensity discharge
lava lamps

39Landscape plants that require the brightest sunlight for best growth should be planted on which side of a house?
north
south
east
west
it does not matter, all sides would be ok

40In nature, the ambient level of carbon dioxide in the atmosphere is _____ the carbon dioxide saturation range for photosynthesis.
above
below
the same as

41The light saturation range for most plants is _____.
100 to 500 ft-c
500 to 1,000 ft-c
1,200 to 2,000 ft-c
10,000 ft-c

42Which of the following will tend to decrease the rate of photosynthesis?     
none will decrease photosynthesis
all will decrease photosynthesis
temperatures near 100 degrees F
water stress or drought
use of leaf shines

43When does the glycolysis reaction of respiration occur?
all the time when O2 is present
only during the light
only when no O2 is present
only during the night

44Where does anaerobic fermentation of respiration occur?
matrix of mitochondria
stroma of chloroplasts
cytosol of cytoplasm
grana of chloroplasts
inner membranes of mitochondria

45What is the input into the cytochrome system in respiration?
carbon dioxide
ATP
water
carbohydrate
oxygen

46Wine making relies on which reaction of respiration to produce alcohol?
Krebs Cycle
anaerobic fermentation
glycolysis
Dark Reaction
cytochrome system

47Which compound triggers ripening of fruit?
oxygen
carbon dioxide
ATP
ethylene
ethanol

48Which of the following can be added to the atmosphere around fruit to decrease their respiration and therefore store longer?
oxygen
carbon dioxide
ATP
ethylene
ethanol

49As temperature decreases respiration _____.
increases
decreases

50Storing produce at zero oxygen is a good idea because the lack of oxygen will decrease respiration and therefore allow the produce to be stored longer.
true
false