Bio 152 Exam #3 UPDATED ACTUAL
Exam Questions and CORRECT Answers
Cell size - CORRECT ANSWER - 40 microliters
Characteristics of Plant Cells - CORRECT ANSWER - -cell walls
-plasma membrane
-large vacuoles
-chloroplasts
-starch grains can be present
-plasmodesmata
What do plant cell lack that animal cells have? - CORRECT ANSWER - lysosomes and
centrioles
Describe primary cell wall - CORRECT ANSWER - -flexible
-cellulose
Describe secondary cell wall - CORRECT ANSWER - -cellulose
-lignin
-other components
Describe Middle Lamella - CORRECT ANSWER - -protein rich layer
-cements together cell walls of adjacent cells
Describe Plasmodesmata - CORRECT ANSWER - -small tubes (cytoplamsic channels)
joining plant cells though pores in primary and secondary cell walls
-living bridge allowing molecules to pass cell to cell
,-provide cell to cell communication
Plant Cell Types (4) - CORRECT ANSWER - -Parenchyma
-Collenchyma
-Sclererchyma
-Vascular (Xylem and Phloem)
Parenchyma Description - CORRECT ANSWER - -workhouse cells
-primary walls thin and flexible (no secondary)
-large vacuoles
-ALIVE at functional maturity
-abundant in fleshy part of fruit
What are vacuoles used for? - CORRECT ANSWER - water and solute storage
Parenchyma Function - CORRECT ANSWER - -totipotent "stem cells" regenerate cells
that are damaged
-metabolism
-photosynthesis
-starch storage in stems and roots
Collenchyma Description - CORRECT ANSWER - -thick primary walls
-grouped in strands or cylinders
-ALIVE at functional maturity
Collenchyma Function - CORRECT ANSWER - -can elongate and expand with stem/leaf
growth
-flexible support for herbaceous and young woody plants
, Sclerenchyma Description - CORRECT ANSWER - -thick secondary walls
-strengthened by lignin
-DEAD at functional maturity (lack protoplasts)
-contain Fibers and Sclereids
Sclerenchyma Function - CORRECT ANSWER - -cannot elongate with growth
-used for support
Fibers (Sclerenchyma) Description - CORRECT ANSWER - long slender and tapering in
bundles (rope,flax)
Sclereids a.k.a "stone cells" (Sclerenchyma) Description - CORRECT ANSWER - -short,
irregular shape
-make hard seed coat/nut shells
-gritty texture in pears
Groups of cells make up.... - CORRECT ANSWER - tissues
Root or shoot meristems produce... - CORRECT ANSWER - -protoderm
-ground meristem
-procambium
Protoderm creates.... - CORRECT ANSWER - dermal tissue system
Ground meristem creates... - CORRECT ANSWER - ground tissue system
Procambium creates... - CORRECT ANSWER - vascular tissue system
Exam Questions and CORRECT Answers
Cell size - CORRECT ANSWER - 40 microliters
Characteristics of Plant Cells - CORRECT ANSWER - -cell walls
-plasma membrane
-large vacuoles
-chloroplasts
-starch grains can be present
-plasmodesmata
What do plant cell lack that animal cells have? - CORRECT ANSWER - lysosomes and
centrioles
Describe primary cell wall - CORRECT ANSWER - -flexible
-cellulose
Describe secondary cell wall - CORRECT ANSWER - -cellulose
-lignin
-other components
Describe Middle Lamella - CORRECT ANSWER - -protein rich layer
-cements together cell walls of adjacent cells
Describe Plasmodesmata - CORRECT ANSWER - -small tubes (cytoplamsic channels)
joining plant cells though pores in primary and secondary cell walls
-living bridge allowing molecules to pass cell to cell
,-provide cell to cell communication
Plant Cell Types (4) - CORRECT ANSWER - -Parenchyma
-Collenchyma
-Sclererchyma
-Vascular (Xylem and Phloem)
Parenchyma Description - CORRECT ANSWER - -workhouse cells
-primary walls thin and flexible (no secondary)
-large vacuoles
-ALIVE at functional maturity
-abundant in fleshy part of fruit
What are vacuoles used for? - CORRECT ANSWER - water and solute storage
Parenchyma Function - CORRECT ANSWER - -totipotent "stem cells" regenerate cells
that are damaged
-metabolism
-photosynthesis
-starch storage in stems and roots
Collenchyma Description - CORRECT ANSWER - -thick primary walls
-grouped in strands or cylinders
-ALIVE at functional maturity
Collenchyma Function - CORRECT ANSWER - -can elongate and expand with stem/leaf
growth
-flexible support for herbaceous and young woody plants
, Sclerenchyma Description - CORRECT ANSWER - -thick secondary walls
-strengthened by lignin
-DEAD at functional maturity (lack protoplasts)
-contain Fibers and Sclereids
Sclerenchyma Function - CORRECT ANSWER - -cannot elongate with growth
-used for support
Fibers (Sclerenchyma) Description - CORRECT ANSWER - long slender and tapering in
bundles (rope,flax)
Sclereids a.k.a "stone cells" (Sclerenchyma) Description - CORRECT ANSWER - -short,
irregular shape
-make hard seed coat/nut shells
-gritty texture in pears
Groups of cells make up.... - CORRECT ANSWER - tissues
Root or shoot meristems produce... - CORRECT ANSWER - -protoderm
-ground meristem
-procambium
Protoderm creates.... - CORRECT ANSWER - dermal tissue system
Ground meristem creates... - CORRECT ANSWER - ground tissue system
Procambium creates... - CORRECT ANSWER - vascular tissue system
