BIO 152 EXAM 4 WITH CORRECT
ANSWERS 2025
Autotrophs correct answers >> organism that can use raw
materials from environment to assemble its own carbon based
molecules
(green plants and bacteria)
Heterotrophs correct answers >> consuming other organisms
to obtain essential molecules
(animals)
light reaction correct answers >> part one of photosynthesis
that absorbs energy from light, and transfers it to energy carrier
molecules
calvin cycle correct answers >> part two of photosynthesis
that receives the transferred energy and uses it to make carbon
based molecules
photons correct answers >> packets of kinetic energy found
in light
red correct answers >> what color of light has long
wavelength and low frequency
blue correct answers >> what color of light has short
wavelength and high frequency
, chlorophyll correct answers >> captures waves in plants to
give its color. good at absorbing red and blue but can't absorb
green (why plants are green)
photosynthetic cells correct answers >> where are
chloroplasts found in plants
thylakoid correct answers >> each of a number of flattened
sacs inside a chloroplast, bounded by pigmented membranes on
which the light reactions of photosynthesis take place, and
arranged in stacks or grana.
- photons absorbed in photosystem 2
- energy excites electrons and puts them in higher energy
- excited electrons ejected from photosystem 2 and transferred to
chain correct answers >> explain step 1 of photosynthesis
light energy
- when electrons are ejected, water is split to resupply
photosystem 2 with more electrons
-water produces oxygen gas as byproduct correct answers >>
explain step 2 of photosynthesis light energy
- excited electrons pass through chain of proteins in thylakoid
membrane
- excited again when they go through photosystem 1
ANSWERS 2025
Autotrophs correct answers >> organism that can use raw
materials from environment to assemble its own carbon based
molecules
(green plants and bacteria)
Heterotrophs correct answers >> consuming other organisms
to obtain essential molecules
(animals)
light reaction correct answers >> part one of photosynthesis
that absorbs energy from light, and transfers it to energy carrier
molecules
calvin cycle correct answers >> part two of photosynthesis
that receives the transferred energy and uses it to make carbon
based molecules
photons correct answers >> packets of kinetic energy found
in light
red correct answers >> what color of light has long
wavelength and low frequency
blue correct answers >> what color of light has short
wavelength and high frequency
, chlorophyll correct answers >> captures waves in plants to
give its color. good at absorbing red and blue but can't absorb
green (why plants are green)
photosynthetic cells correct answers >> where are
chloroplasts found in plants
thylakoid correct answers >> each of a number of flattened
sacs inside a chloroplast, bounded by pigmented membranes on
which the light reactions of photosynthesis take place, and
arranged in stacks or grana.
- photons absorbed in photosystem 2
- energy excites electrons and puts them in higher energy
- excited electrons ejected from photosystem 2 and transferred to
chain correct answers >> explain step 1 of photosynthesis
light energy
- when electrons are ejected, water is split to resupply
photosystem 2 with more electrons
-water produces oxygen gas as byproduct correct answers >>
explain step 2 of photosynthesis light energy
- excited electrons pass through chain of proteins in thylakoid
membrane
- excited again when they go through photosystem 1
