Science Bowl

BIOLOGY

Biology - 43

BIOL-91; Multiple Choice:  In osmosis the flow of SOLVENT moves in what direction of
tonicity?

a)  isotonic to hypotonic
b)  hypotonic to hypertonic
c)  hypertonic to isotonic
d)  hypertonic to hypotonic

ANSWER:  B -- HYPOTONIC TO HYPERTONIC

BIOL-91; Multiple Choice:  If a red blood cell is placed in a hypotonic solution, it:

a)  swells
b)  shrinks
c)  crenates
d)  remains the same

ANSWER:  A -- SWELLS

BIOL-91; Multiple Choice:  Substances insoluble in a membrane are carried across the membrane
with the concentration gradient by means of a carrier molecule in a process known as:

a)  osmosis.
b)  diffusion.
c)  active transport.
d)  facilitated diffusion.

ANSWER:  D -- FACILITATED DIFFUSION.

BIOL-91; Short Answer:  The process of moving molecules against an electro-chemical gradient
is:

ANSWER:  ACTIVE TRANSPORT

BIOL-91; Multiple Choice:  Invagination by a cell membrane forming a vesicle around a solid
particle is a:

a)  lysosome
b)  phagocytosis

(pron: fag-o-sigh-toe-sis)

c)  pinocytosis

(pron: pin-o-sigh-toe-sis)

d)  peroxisomes

(pron: pay-rak-se-som)

ANSWER:  B -- PHAGOCYTOSIS