True or False

Question 1

True or False: The light-
independent reaction takes place in the thylakoid
membranes of the
chloroplast.

Answer 1

False

Explanation: The light-
independent reaction (Calvin

cycle) occurs in the stroma, not
the thylakoid membranes.

Question 2

True or False: Oxygen
is the final electron
acceptor in aerobic
respiration.

Answer 2

True
Explanation: Oxygen accepts
electrons and protons at the
end of the electron transport
chain, forming water.

Question 3

True or False: ATP and
reduced NADP are
produced during the
light-independent stage
of photosynthesis.

Answer 3

False
Explanation: ATP and reduced NADP are
produced in the light-dependent stage,
not the light-independent stage.

Question 4

True or False: In plants,
most of the sugars made
in photosynthesis are
used for respiration.

Answer 4

True
Explanation: Most sugars are used
as respiratory substrates; the rest
are converted into other biological
molecules.

Question 5

True or False: Anaerobic
respiration in animals
produces ethanol and
carbon dioxide.

Answer 5

False
Explanation: Anaerobic
respiration in animals produces
lactate, not ethanol or carbon
dioxide.

Question 6

True or False: Rubisco
is the enzyme that
catalyses the first step
of the Calvin cycle.

Answer 6

True
Explanation: Rubisco catalyses
the reaction between CO2 and
RuBP to form glycerate-3-
phosphate (GP).

Question 7

True or False: Biomass
refers to the total
chemical energy store in
the organisms of a
trophic level.

Answer 7

True
Explanation: Biomass is the mass of
living material, often measured as dry
mass, and reflects energy content.

Question 8

True or False: The electron
transport chain in
respiration occurs in the
matrix of the
mitochondrion.

Answer 8

False
Explanation: The electron transport
chain is located on the inner
mitochondrial membrane, not in the
matrix.